Rotary engine oil metering pump

Claim 2

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an airfuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; plate control means mounted in said pump body for tilting said plate about said plate axis from a position perpendicular to said pump shaft axis whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to said plate control means so that said plate control means is effective to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port and oil is supplied to said passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 3

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; cam means mounted in said pump body opposite said plate for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam means is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam means to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port and oil is supplied to said passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 4

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; cam means mounted in said pump body opposite said plate for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam means is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam means to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port and oil is supplied to said passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 5

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for Movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; and cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port and oil is supplied to said passage means at a rate which inreases with increasing output shaft speed an increasing throttle opening.

Claim 6

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for Movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; and cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port and oil is supplied to said passage means at a rate which inreases with increasing output shaft speed an increasing throttle opening.

Claim 7

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively conNecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and pressure regulator valve means in said passage means remote from said outlet port for maintaining positive oil pressure in said passage means between said regulator valve means and said outlet port whereby oil is supplied from said passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 8

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite said inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; biasing means for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively conNecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; and pressure regulator valve means in said passage means remote from said outlet port for maintaining positive oil pressure in said passage means between said regulator valve means and said outlet port whereby oil is supplied from said passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 9

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis, means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite sai inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; a spring mounted in said chamber for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port; and pressure regulator valve means in said passage means remote from said outlet port for maintaiNing positive oil pressure in said passage means between said regulator valve means and said outlet port whereby oil is supplied from said passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 10

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a rotor rotatably mounted on said output shaft, gas seals mounted on said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis, means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having an axially extending cylinder open through one end thereof and spaced from said axis; a piston mounted for reciprocal movement in said cylinder; said piston and cylinder cooperatively defining a chamber whose volume varies when said piston is reciprocated in opposite expanding and contracting directions; an inlet port in said pump body opening through said bore for supplying oil to said chamber; an outlet port in said pump body opening through said bore at an axial location opposite sai inlet port for receiving oil from said chamber; a discharge passage in said pump body connected to said outlet port; passage means for delivering oil from said discharge passage to lubricate said gas seals; a timing port in said pump shaft at the same axial location as said inlet and outlet ports for alternately connecting said inlet and outlet ports to said chamber during each revolution of said pump shaft; a plate mounted in said pump body opposite said piston for movement about an axis intersecting and at right angles to said axis of said pump shaft; a spring mounted in said chamber for biasing said piston outward of said cylinder in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said piston is caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said inlet port connects with said chamber during chamber expansion and said outlet port connects with said chamber during chamber contraction; balance valve means mounted for reciprocal movement in said outlet port and acted on in opposite directions by oil pressure in said outlet port and said inlet port, respectively, for providing controlled valve connection between said outlet port and said discharge passage to establish pressure balance between said inlet port and said outlet port so that the oil being displaced by said piston is pumped at a pressure equalling the pressure at said inlet port; and pressure regulator valve means in said passage means remote from said outlet port for maintaiNing positive oil pressure in said passage means between said regulator valve means and said outlet port whereby oil is supplied from said passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 11

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; plate control means mounted in said pump body for tilting said plate about said plate axis from a position perpendicular to said pump shaft axis whereby on turing of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to said plate control means so that said plate control means is effective to increase piston stroke with increasing throttle opening, said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressUre at said inlet ports and oil is supplied to said first and second passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 12

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; plate control means mounted in said pump body for tilting said plate about said plate axis from a position perpendicular to said pump shaft axis whereby on turing of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to said plate control means so that said plate control means is effective to increase piston stroke with increasing throttle opening, said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressUre at said inlet ports and oil is supplied to said first and second passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 13

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers; respectively, first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; cam means mounted in said pump body opposite said plate for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam means is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam means to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at said inlet ports and oil is supplied to said first and second passage means at a rate wHich increases with increasing output shaft speed and increasing throttle opening.

Claim 14

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers; respectively, first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; cam means mounted in said pump body opposite said plate for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam means is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam means to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at said inlet ports and oil is supplied to said first and second passage means at a rate wHich increases with increasing output shaft speed and increasing throttle opening.

Claim 15

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at Said inlet ports and oil is supplied to said first and second passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 16

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the pivot direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at Said inlet ports and oil is supplied to said first and second passage means at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 17

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotor; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second pressure regulator valve means in said first and second passage means, respectively, remote from said first and second outlet ports, respectively, for maintaining positive oil pressure in said passage means between said first and second regulator valve means and said first and second outlet ports, respectively, whereby oil is supplied from said first and second passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 18

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotor; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second biasing means for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; and first and second pressure regulator valve means in said first and second passage means, respectively, remote from said first and second outlet ports, respectively, for maintaining positive oil pressure in said passage means between said first and second regulator valve means and said first and second outlet ports, respectively, whereby oil is supplied from said first and second passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 19

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second springs mounted in said first and second chambers for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at said inlet ports; and first and second pressure regulatOr valve means in said first and second passage means, respectively, remote from said first and second outlet ports, respectively, for maintaining positive oil pressure in said passage means between said first and second regulator valve means and said first and second outlet ports, respectively, whereby oil is supplied from said first and second passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.

Claim 20

A rotary engine comprising a housing, an output shaft rotatably mounted in said housing, a pair of rotors rotatably mounted on said output shaft, gas seals mounted on each said rotor and engaging said housing, and a throttle for controlling delivery of an air-fuel mixture to run said engine, an oil metering pump comprising a pump body having a bore; a pump shaft mounted in said bore for rotation about an axis; means drivingly connecting said output shaft to rotate said pump shaft; said pump shaft having first and second axially extending diametrically oppositely located cylinders open through one end thereof; first and second pistons mounted for reciprocal movement in said first and second cylinders, respectively; said first and second pistons and cylinders cooperatively defining first and second chambers, respectively, whose volumes vary when said pistons are reciprocated in opposite expanding and contracting directions; first and second inlet ports in said pump body opening through said bore at different axial locations for supplying oil to said first and second chambers, respectively; first and second outlet ports in said pump body opening through said bore at axial locations opposite said first and second inlet ports, respectively, for receiving oil from said first and second chambers; first and second discharge passages in said pump body connected to said first and second outlet ports, respectively; first and second passage means for delivering oil from said first and second discharge passages, respectively, to separately lubricate said gas seals on said rotors; first and second timing ports in said pump shaft at the same axial locations as said first and second inlet ports and outlet ports for alternately connecting said first and second inlet ports and said first and second outlet ports to said first and second chambers, respectively, during each revolution of said pump shaft; a plate mounted in said pump body opposite said pistons for movement about an axis intersecting and at right angles to said axis of said pump shaft; first and second springs mounted in said first and second chambers for biasing said first and second pistons, respectively, outward of said cylinders in said expanding direction against said plate; a cam member mounted in said pump body opposite said plate for turning movement about said axis of said pump shaft; said cam member having two diametrically opposite axially projecting cams of different height and opposite inclination for engaging said plate so that said plate is tilted about said plate axis from a position perpendicular to said pump shaft axis as said cam member is turned whereby on turning of said pump shaft said pistons are caused to move in said contracting direction and have a stroke that increases with increasing tilting of said plate; means operatively connecting said throttle to turn said cam member to increase piston stroke with increasing throttle opening; said inlet ports and outlet ports located on radially opposite sides of said plate axis and relative to the tilting direction of said plate with increasing throttle opening so that said first and second inlet ports connect with said first and second chambers, respectively, during chamber expansion and said first and second outlet ports connect with said first and second chambers, respectively, during chamber contraction; first and second balance valve means mounted for reciprocal movement in said first and second outlet ports, respectively, and acted on in opposite directions by oil pressure in said first and second outlet ports and said first and second inlet ports, respectively, for providing controlled valve connections between said first and second outlet ports and said first and second discharge passages to establish pressure balance between said first and second inlet ports and said first and second outlet ports, respectively, so that the oil being displaced by said pistons is pumped at a pressure equalling the pressure at said inlet ports; and first and second pressure regulatOr valve means in said first and second passage means, respectively, remote from said first and second outlet ports, respectively, for maintaining positive oil pressure in said passage means between said first and second regulator valve means and said first and second outlet ports, respectively, whereby oil is supplied from said first and second passage means for the gas seal lubrication at a rate which always increases with increasing output shaft speed and increasing throttle opening.