Rotary engine oil metering pump

Claim 2

An oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle comprising a pump body having a bore, a pump drive shaft rotatably mounted in said bore, means drivingly connecting said output shaft to rotate said pump drive shaft, a follower rotatably mounted in said bore, said follower having a bore with a closed inner end, said pump drive shaft having a reduced diameter portion received in said bore in said follower, means for drivingly connecting said pump drive shaft and said follower while permitting said follower to move axially in said bore relative to said pump drive shaft, said pump drive shaft having a central axially extending cylinder in one end thereof, a doubleended plunger of constant diameter mounted in said cylinder, one end of said plunger projecting out of said cylinder to engage said closed end of said bore in said follower, the other end of said plunger and said cylinder cooperatively defining a chamber in said pump drive shaft whose volume varies when said plunger is reciprocated, a stroke adjustment member mounted in said pump body, a roller rotatably supported on said stroke adjustment member, said follower having a cam surface engageable with said roller and cooperating therewith to effect movement of said plunger in one direction to contract said chamber during a portion of a follower revolution and permitting said plunger to move in the opposite direction to expand said chamber during the remainder of the follower revolution with the stroke of said plunger increasing as the location of contact of said roller with said follower is increased from the axis of said follower, a spring seat secured to said plunger adjacent said one end thereof, spring means arranged in said bore in said follower between said one end of said pump drive shaft and said spring seat for maintaining said plunger against said follower while forcing said follower to follow said roller during movement of said plunger in said opposite direction, 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 for delivering oil from said chamber to lubricate said gas seals, a timing port in said follower member For alternatively connecting said inlet port to said chamber during chamber expansion and said outlet port to said chamber during chamber contraction all during each revolution of said pump drive shaft, means for operatively connecting said throttle and said stroke adjustment member so that said stroke adjustment member is moved to increase the stroke of said plunger as said throttle is opened whereby oil is metered from said inlet port to said outlet port for gas seal lubrication at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 3

An oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle comprising a pump body having a bore, a pump drive shaft rotatably mounted in said bore, means drivingly connecting said output shaft to rotate said pump drive shaft, a follower rotatably mounted in said bore, said follower having a bore with a closed inner end, said pump drive shaft having a reduced diameter portion received in said bore in said follower, means for drivingly connecting said pump drive shaft and said follower while permitting said follower to move axially in said bore relative to said pump drive shaft, said pump drive shaft having a central axially extending cylinder in one end thereof, a double-ended plunger of constant diameter mounted in said cylinder, one end of said plunger projecting out of said cylinder to engage said closed end of said bore in said follower, the other end of said plunger and said cylinder cooperatively defining a chamber in said pump drive shaft whose volume varies when said plunger is reciprocated, a stroke adjustment member mounted in said pump body, a roller rotatably supported on said stroke adjustment member, said follower having a cam surface engageable with said roller and cooperating therewith to effect movement of said plunger in one direction to contract said chamber during a portion of a follower revolution and permitting said plunger to move in the opposite direction to expand said chamber during the remainder of the follower revolution with the stroke of said plunger increasing as the location of contact of said roller with said follower is increased from the axis of said follower, a spring seat secured to said plunger adjacent said one end thereof, spring means arranged in said bore in said follower between said one end of said pump drive shaft and said spring seat for biasing said plunger to follow said follower in the opposite direction while also biasing said follower to follow said roller during movement of said plunger in said opposite direction, 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 for delivering oil from said chamber to lubricate said gas seals, a timing port in said follower for alternatively connecting said inlet port to said chamber during chamber expansion and said outlet port to said chamber during chamber contraction all during each revolution of said pump drive shaft, means for causing said stroke adjustment member to move to adjust the contact location of said roller when said stroke adjustment member is turned, means for operatively connecting said throttle and said stroke adjustment member so that said stroke adjustment member is turned to increase the stroke of said plunger as said throttle is opened whereby oil is metered from said inlet port to said outlet port for gas seal lubrication at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 4

An oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle comprising a pump body having a bore, a pump drive shaft rotatably mounted in said bore, means drivingly connecting said output shaft to rotate said pump drive shaft, a follower rotatably mounted in said bore, said follower having a bore with a closed inner end, said pump drive shaft having a reduced diameter portion received in said bore in said follower, means for drivingly connecting said pump drive shaft and said follower while permitting said follower to move axially in said bore relative to said pump drive shaft, said pump drive shaft having a central axially extending cylinder in one end thereof, a double-ended plunger of constant diameter mounted in said cylinder, one end of said plunger projecting out of said cylinder to engage said closed end of said bore in said follower, the other end of said plunger and said cylinder cooperatively defining a chamber in said pump drive shaft whose volume varies when said plunger is reciprocated, a stroke adjustment member mounted in said pump body, a roller rotatably supported on said stroke adjustment member, said follower having a cam surface engageable with said roller and cooperating therewith to effect movement of said plunger in one direction to contract said chamber during a portion of a follower revolution and permitting said plunger to move in the opposite direction to expand said chamber during the remainder of the follower revolution with the stroke of said plunger increasing as the location of contact of said roller with said follower is increased from the axis of said follower, a spring seat secured to said plunger adjacent said one end thereof, spring means arranged in said bore in said follower between said one end of said pump drive shaft and said spring seat for biasing said plunger to follow said follower in the opposite direction while also biasing said follower to follow said roller during movement of said plunger in said opposite direction, 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 for delivering oil from said chamber to lubricate said gas seals, a timing port in said follower for alternatively connecting said inlet port to said chamber during chamber expansion and said outlet port to said chamber during chamber contraction all during each revolution of said pump drive shaft, means for causing said stroke adjustment member to move to adjust the contact location of said roller when said stroke adjustment member is turned, means for operatively connecting said throttle and said stroke adjustment member so that said stroke adjustment member is turned to increase the stroke of said plunger as said throttle is opened whereby oil is metered from said inlet port to said outlet port for gas seal lubrication at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 5

An oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle comprising a pump body having a bore, a pump drive shaft rotatably mounted in said bore, said follower having a bore with a closed inner end, said pump drive shaft having a reduced diameter portion received in said bore in said follower, means drivingly connecting said output shaft to rotate said pump drive shaft, a follower having an external cylindrical surface rotatably mounted in said bore, means for drivingly connecting said pump drive shaft and said follower while permitting said follower to move axially in said bore relative to said pump drive shaft, said pump drive shaft having a central axially extending cylinder in one end thereof, a double-ended plunger of constant diameter mounted in said cylinder, one end of said plunger projecting out of said cylinder to engage said closed end of said bore in said follower, the other end of said plunger and said cylinder cooperatively defining a chamber in said pump drive shaft whose volume varies when said plunger is reciprocated, a stroke adjustment member mounted in said pump body, a spherical roller supported on said stroke adjustment member for rotation about an axis that intersects with the axis of said follower, said follower having a flat cam surface inclined to the axis of said follower engageable with said roller and cooperating therewith to effect movement of said plunger in one direction to contract said chamber during a portion of a follower revolution and permitting said plunger to move in the opposite direction to expand said chamber during the remainder of the follower revolution with the stroke of said plunger increasing as the location of contact of said roller with said follower is increased in a radial direction from the axis of said follower, a coil spring arranged in said bore in said follower about said plunger and between said one end of said pump drive shaft and said spring seat for biasing said plunger to follow said follower in the opposite direction while also biasing said follower to follow said roller during movement of said plunger in said opposite direction, 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 for delivering oil from said chamber to lubricate said gas seals, a timing port in said follower through said cylindrical surface for alternatively connecting said inlet port to said chamber during chamber expansion and said outlet port to said chamber during chamber contraction all during each revolution of said pump drive shaft, means for causing said stroke adjustment member to move to adjust the contact location of said roller when said stroke adjustment member is turned, means for operatively connecting said throttle and said stroke adjustment member so that said stroke adjustment member is turned to increase the stroke of said plunger as said throttle is opened whereby oil is metered from said inlet port to said outlet port for gas seal lubrication at a rate which increases with increasing output shaft speed and increasing throttle opening.

Claim 6

An oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle comprising a pump body having a bore, a pump drive shaft rotatably mounted in said bore, said follower having a bore with a closed inner end, said pump drive shaft having a reduced diameter portion received in said bore in said follower, means drivingly connecting said output shaft to rotate said pump drive shaft, a follower having an external cylindrical surface rotatably mounted in said bore, means for drivingly connecting said pump drive shaft and said follower while permitting said follower to move axially in said bore relative to said pump drive shaft, said pump drive shaft having a central axially extending cylinder in one end thereof, a double-ended plunger of constant diameter mounted in said cylinder, one end of said plunger projecting out of said cylinder to engage said closed end of said bore in said follower, the other end of said plunger and said cylinder cooperatively defining a chamber in said pump drive shaft whose volume varies when said plunger is reciprocated, a stroke adjustment member mounted in said pump body, a spherical roller supported on said stroke adjustment member for rotation about an axis that intersects with the axis of said follower, said follower having a flat cam surface inclined to the axis of said follower engageable with said roller and cooperating therewith to effect movement of said plunger in one direction to contract said chamber during a portion of a follower revolution and permitting said plunger to move in the opposite direction to expand said chamber during the remainder of the follower revolution with the stroke of said plunger increasing as the location of contact of said roller with said follower is increased in a radial direction from the axis of said follower, a coil spring arranged in said bore in said follower about said plunger and between said one end of said pump drive shaft and said spring seat for biasing said plunger to follow said follower in the opposite direction while also biasing said follower to follow said roller during movement of said plunger in said opposite direction, 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 for delivering oil from said chamber to lubricate said gas seals, a timing port in said follower through said cylindrical surface for alternatively connecting said inlet port to said chamber during chamber expansion and said outlet port to said chamber during chamber contraction all during each revolution of said pump drive shaft, means for causing said stroke adjustment member to move to adjust the contact location of said roller when said stroke adjustment member is turned, means for operatively connecting said throttle and said stroke adjustment member so that said stroke adjustment member is turned to increase the stroke of said plunger as said throttle is opened whereby oil is metered from said inlet port to said outlet port for gas seal lubrication at a rate which increases with increasing output shaft speed and increasing throttle opening.