Rotary engine oil metering pump

Claim 2

In an oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shafT and a throttle, a pump body having a pump shaft bore, a pump shaft rotatably mounted in said bore, means operatively drivingly connecting said pump shaft to be driven by said output shaft at a speed proportional thereto, said pump shaft having an oil chamber including a radial plunger bore, a plunger reciprocally mounted in said plunger bore operative to increase the volume of said oil chamber on radially outward movement and decrease the volume on radially inward movement, a plunger stroke control ring mounted in said pump body about said pump shaft having a radially inwardly facing circular stroke control surface arranged radially opposite said plunger, means for biasing said plunger radially outward to continuously contact said stroke control surface of said stroke control ring, means for preventing rotation of said stroke control ring while permitting movement of said stroke control ring in fixed opposite radial directions relative to said pump shaft between positions where said stroke control surface is eccentric with respect to said pump shaft whereby said plunger is caused to reciprocate as said pump shaft turns with a plunger stroke that increases with increasing eccentricity of said stroke control surface to provide a pump displacement that increases with increasing eccentricity of said stroke control surface and a pump displacement per unit of time that increases with increasing pump shaft speed, means for increasing the eccentricity of said stroke control surface as said throttle is opened, an oil supply passage in said pump body for supplying oil to be metered, an oil delivery passage in said pump body for delivering metered oil to lubricate the gas seals of the engine, said pump shaft bore having an inlet recess cooperating with said pump shaft to define an inlet port connected to said oil supply passage, said pump shaft bore further having an outlet recess cooperating with said pump shaft to define an outlet port angularly spaced from said inlet port, said outlet port connected to said oil delivery passage, all of said ports being located at the same axial location along said pump shaft, said oil chamber in said pump shaft having an oil inlet-oil outlet port at the same axial location as said inlet port and said outlet port for sequentially connecting said inlet port to said oil chamber when said oil chamber is expanding and then connecting said oil chamber to said outlet port when said oil chamber is contracting all during one pump shaft revolution whereby oil is metered from said oil supply passage to said oil delivery passage at a rate that increases with increasing output shaft speed and throttle opening.

Claim 3

In an oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle, a pump body having a cylindrical pump shaft bore, a cylindrical pump shaft rotatably mounted in said bore, means operatively drivingly connecting said pump shaft to be driven by said output shaft at a speed proportional thereto, said pump shaft having an oil chamber including a cylindrical radial plunger bore, a cylindrical plunger reciprocally mounted in said plunger bore operative to increase the volume of said oil chamber on radially outward movement and decrease the volume on radially inward movement, a plunger stroke control ring mounted in said pump body about said pump shaft having a radially inwardly facing circular stroke control surface arranged radially opposite said plunger, a spring mounted in said oil chamber for biasing said plunger radially outward to continuously contact said stroke control surface of said stroke control ring, means for preventing rotation of said stroke control ring while permitting movement of said stroke control ring in fixed opposite radial directions relative to said pump shaft between positions where said stroke control surface is eccentric with respect to said pump shaft whereby said plunger is caused to reciprocate as said pump shaft turns with a plunger stroke that increases with increasiNg eccentricity of said stroke control surface to provide a pump displacement that increases with increasing eccentricity of said stroke control surface and a pump displacement per unit of time that increases with increasing pump shaft speed, a displacement control shaft mounted on said pump body engaging said stroke control ring, means for causing said displacement control shaft to positively move said stroke control ring in one of its fixed radial directions to increase the eccentricity of said stroke control surface when said displacement control shaft is turned in one angular direction, a spring mounted in said pump body for biasing said stroke control ring to follow said displacement control shaft and move in the opposite radial direction to decrease the eccentricity of said stroke control surface when said displacement control shaft is turned in the opposite angular direction, means operatively connecting said throttle and said displacement control shaft to vary the angular position of said displacement control shaft with opening of said control valve wherein said displacement control shaft is turned in said one angular direction as said throttle valve is opened, an oil supply passage in said pump body for supplying oil to be metered, an oil delivery passage in said pump body for delivering metered oil to lubricate the gas seals of the engine, said pump shaft bore having an inlet recess cooperating with said pump shaft to define an inlet port connected to said oil supply passage, said pump shaft bore further having an outlet recess cooperating with said pump shaft to define an outlet port angularly spaced from said inlet port, said outlet port connected to said oil delivery passage, all of said ports being located at the same axial location along said pump shaft, said oil chamber in said pump shaft having an oil inlet-oil outlet port at the same axial location as said inlet port and said outlet ports for sequentially connecting said inlet port to said oil chamber when said oil chamber is expanding and then connecting said oil chamber to said outlet port when said oil chamber is contracting all during one pump shaft revolution whereby oil is metered from said oil supply passage to said oil delivery passage at a rate that increases with increasing output shaft speed and throttle opening.

Claim 4

In an oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle, a pump body having a cylindrical pump shaft bore, a cylindrical pump shaft rotatably mounted in said bore, means operatively drivingly connecting said pump shaft to be driven by said output shaft at a speed proportional thereto, said pump shaft having an oil chamber including a cylindrical radial plunger bore, a cylindrical plunger reciprocally mounted in said plunger bore operative to increase the volume of said oil chamber on radially outward movement and decrease the volume on radially inward movement, a plunger stroke control ring mounted in said pump body about said pump shaft having a radially inwardly facing circular stroke control surface arranged radially opposite said plunger, a spring mounted in said oil chamber for biasing said plunger radially outward to continuously contact said stroke control surface of said stroke control ring, means for preventing rotation of said stroke control ring while permitting movement of said stroke control ring in fixed opposite radial directions relative to said pump shaft between positions where said stroke control surface is eccentric with respect to said pump shaft whereby said plunger is caused to reciprocate as said pump shaft turns with a plunger stroke that increases with increasiNg eccentricity of said stroke control surface to provide a pump displacement that increases with increasing eccentricity of said stroke control surface and a pump displacement per unit of time that increases with increasing pump shaft speed, a displacement control shaft mounted on said pump body engaging said stroke control ring, means for causing said displacement control shaft to positively move said stroke control ring in one of its fixed radial directions to increase the eccentricity of said stroke control surface when said displacement control shaft is turned in one angular direction, a spring mounted in said pump body for biasing said stroke control ring to follow said displacement control shaft and move in the opposite radial direction to decrease the eccentricity of said stroke control surface when said displacement control shaft is turned in the opposite angular direction, means operatively connecting said throttle and said displacement control shaft to vary the angular position of said displacement control shaft with opening of said control valve wherein said displacement control shaft is turned in said one angular direction as said throttle valve is opened, an oil supply passage in said pump body for supplying oil to be metered, an oil delivery passage in said pump body for delivering metered oil to lubricate the gas seals of the engine, said pump shaft bore having an inlet recess cooperating with said pump shaft to define an inlet port connected to said oil supply passage, said pump shaft bore further having an outlet recess cooperating with said pump shaft to define an outlet port angularly spaced from said inlet port, said outlet port connected to said oil delivery passage, all of said ports being located at the same axial location along said pump shaft, said oil chamber in said pump shaft having an oil inlet-oil outlet port at the same axial location as said inlet port and said outlet ports for sequentially connecting said inlet port to said oil chamber when said oil chamber is expanding and then connecting said oil chamber to said outlet port when said oil chamber is contracting all during one pump shaft revolution whereby oil is metered from said oil supply passage to said oil delivery passage at a rate that increases with increasing output shaft speed and throttle opening.

Claim 5

In an oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle, a pump body having a cylindrical pump shaft bore, a cylindrical pump shaft rotatably mounted in said bore, means operatively drivingly connecting said pump shaft to be driven by said output shaft at a speed proportional thereto, said pump shaft having an oil chamber including a cylindrical radial plunger bore, a cylindrical plunger reciprocally mounted in said plunger bore operative to increase the volume of said oil chamber on radially outward movement and decrease the volume on radially inward movement, a plunger stroke control ring mounted in said pump body about said pump shaft having a radially inwardly facing circular stroke control surface arranged radially opposite said plunger, a spring mounted in said oil chamber for biasing said plunger radially outward to continuously contact said stroke control surface of said stroke control ring, means for preventing rotation of said stroke control ring while permitting movement of said stroke control ring in fixed opposite radial directions relative to said pump shaft between positions where said stroke control surface is eccentric with respect to said pump shaft whereby said plunger is caused to reciprocate as said pump shaft turns with a plunger stroke that increases with increasing eccentricity of said stroke control surface to provide a pump displacement that increases with increasing eccentricity of said stroke control surface and a pump displacement per unit of time that increases with increasing pump shaft speed, a displacement control shaft mounted on said pump body engaging said stroke control ring, means fOr causing said displacement control shaft to positively move said stroke control ring in one of its fixed radial directions to increase the eccentricity of said stroke control surface when said displacement control shaft is turned in one angular direction, a spring mounted in said pump body for biasing said stroke control ring to follow said displacement control shaft and move in the opposite radial direction to decrease the eccentricity of said stroke control surface when said displacement control shaft is turned in the opposite angular direction, means operatively connecting said throttle and said displacement control shaft to vary the angular position of said displacement control shaft with opening of said control valve wherein said displacement control shaft is turned in said one angular direction as said throttle is opened, an oil supply passage in said pump body for supplying oil to be metered, a pair of oil delivery passages in said pump body for delivering metered oil to lubricate the gas seals of the engine, said pump shaft bore having an inlet recess cooperating with said pump shaft to define an inlet port connected to said oil supply passage, said pump shaft bore further having a pair of angularly spaced outlet recesses cooperating with said pump shaft to define a pair of angular spaced outlet ports angularly spaced from said inlet port, each of said outlet ports connected to one of said oil delivery passages, all of said ports being located at the same axial location along said pump shaft, said oil chamber in said pump shaft having an oil inlet-oil outlet port at the same axial location as said inlet port and said outlet ports for sequentially connecting said inlet port to said oil chamber when said oil chamber is expanding and then successively connecting said oil chamber to said outlet ports when said oil chamber is contracting all during one pump shaft revolution whereby oil is metered from said oil supply passage to said oil delivery passages at a rate that increases with increasing output shaft speed and throttle opening.

Claim 6

In an oil metering pump for metering oil to lubricate a rotary engine having gas seals, an output shaft and a throttle, a pump body having a cylindrical pump shaft bore, a cylindrical pump shaft rotatably mounted in said bore, means operatively drivingly connecting said pump shaft to be driven by said output shaft at a speed proportional thereto, said pump shaft having an oil chamber including a cylindrical radial plunger bore, a cylindrical plunger reciprocally mounted in said plunger bore operative to increase the volume of said oil chamber on radially outward movement and decrease the volume on radially inward movement, a plunger stroke control ring mounted in said pump body about said pump shaft having a radially inwardly facing circular stroke control surface arranged radially opposite said plunger, a spring mounted in said oil chamber for biasing said plunger radially outward to continuously contact said stroke control surface of said stroke control ring, means for preventing rotation of said stroke control ring while permitting movement of said stroke control ring in fixed opposite radial directions relative to said pump shaft between positions where said stroke control surface is eccentric with respect to said pump shaft whereby said plunger is caused to reciprocate as said pump shaft turns with a plunger stroke that increases with increasing eccentricity of said stroke control surface to provide a pump displacement that increases with increasing eccentricity of said stroke control surface and a pump displacement per unit of time that increases with increasing pump shaft speed, a displacement control shaft mounted on said pump body engaging said stroke control ring, means fOr causing said displacement control shaft to positively move said stroke control ring in one of its fixed radial directions to increase the eccentricity of said stroke control surface when said displacement control shaft is turned in one angular direction, a spring mounted in said pump body for biasing said stroke control ring to follow said displacement control shaft and move in the opposite radial direction to decrease the eccentricity of said stroke control surface when said displacement control shaft is turned in the opposite angular direction, means operatively connecting said throttle and said displacement control shaft to vary the angular position of said displacement control shaft with opening of said control valve wherein said displacement control shaft is turned in said one angular direction as said throttle is opened, an oil supply passage in said pump body for supplying oil to be metered, a pair of oil delivery passages in said pump body for delivering metered oil to lubricate the gas seals of the engine, said pump shaft bore having an inlet recess cooperating with said pump shaft to define an inlet port connected to said oil supply passage, said pump shaft bore further having a pair of angularly spaced outlet recesses cooperating with said pump shaft to define a pair of angular spaced outlet ports angularly spaced from said inlet port, each of said outlet ports connected to one of said oil delivery passages, all of said ports being located at the same axial location along said pump shaft, said oil chamber in said pump shaft having an oil inlet-oil outlet port at the same axial location as said inlet port and said outlet ports for sequentially connecting said inlet port to said oil chamber when said oil chamber is expanding and then successively connecting said oil chamber to said outlet ports when said oil chamber is contracting all during one pump shaft revolution whereby oil is metered from said oil supply passage to said oil delivery passages at a rate that increases with increasing output shaft speed and throttle opening.