Rotary engine oil metering pump

Claim 2

An oil metering pump for a rotary engine having gas seals, an output shaft and a throttle, said pump comprising a pump body having a stepped diameter bore, a stepped diameter plunger reciprocably and rotatably mounted in said bore and cooperating therewith to provide a variable volume chamber between the steps of said bore and said plunger having a displacement determined by the extent of plunger stroke, means drivingly connecting said output shaft to rotate said plunger while permitting said plunger to reciprocate, a cam pivotably mounted in said pump body, means operatively connecting said throttle to vary the angular position of said cam with the opening of said throttle said plunger having a cam follower at one end contactable with said cam, a spring arranged in said bore between said plunger and said pump body for continuously biasing said cam follower to follow said cam, said cam and said spring biased cam follower cooperating to effect reciprocal plunger movement on rotation of said plunger with the plunger stroke varying with the angular position of said cam, an inlet port for receiving oil open to said bore in the path of rotary motion of said plunger, an outlet port for delivering oil to lubricate said gas seals open to said bore in the path of rotary motion of said plunger, and said plunger having an external relieved portion cooperating with said bore to define a passage for successively connecting said inlet port to said chamber when said chamber is expanding and said chamber to said outlet port when said chamber is contracting during one plunger revolution.

Claim 3

An oil metering pump for a rotary engine having gas seals, an output shaft and a throttle, said pump comprising a pump body having a stepped diameter bore, a stepped diameter plunger reciprocably and rotatably mounted in said bore and cooperating therewith to provide a variable volume chamber between the steps of said bore and said plunger having a displacement determined by the extent of plunger stroke, means drivingly connecting said output shaft to rotate said plunger while permitting said plunger to reciprocate, a cam pivotably mounted in said pump body, means operatively connecting said throttle to vary the angular position of said cam with the opening of said throttle said plunger having a cam follower at one end contactable with said cam, a spring arranged in said bore between said plunger and said pump body for continuously biasing said cam follower to follow said cam, said cam and said spring biased cam follower cooperating to effect two complete reciprocating plunger strokes on one complete rotation of said plunger with the plunger stroke varying with the angular position of said cam to increase plunger stroke with increasing throttle opening, a pair of inlet ports for receiving oil open to said bore at diametrically opposite locations in the path of rotary motion of said plunger, a pair of outlet ports for delivering oil to lubricate said gas seals open to said bore at diametrically opposite locations in the path of rotary motion of said plunger, said plunger having an external relieved portion cooperating with said bore to define a passage for successively connecting one of said inlet ports to said chamber when said chamber is expanding and said chamber to one of said outlet ports when said chamber is contracting during one-half of a plunger revolution and also for successively connecting the other of said inlet ports to said chamber when said chamber is expanding and said chamber to the other of said outlet ports when said chamber is contracting during the remaining one-half of a plunger revolution.

Claim 4

An oil metering pump for a rotary engine having gas seals, an output shaft and a throttle, said pump comprising a pump body having a stepped diameter bore, a stepped diameter plunger reciprocably and rotatably mounted in said bore and cooperating therewith to provide a variable volume chamber between the steps of said bore and said plunger having a displacement determined by the extent of plunger stroke, means drivingly connecting said output shaft to rotate said plunger while permitting said plunger to reciprocate, a cam pivotably mounted in said pump body, means operatively connecting said throttle to vary the angular position of said cam with the opening of said throttle said plunger having a cam follower at one end contactable with said cam, a spring arranged in said bore between said plunger and said pump body for continuously biasing said cam follower to follow said cam, said cam and said spring biased cam follower cooperating to effect two complete reciprocating plunger strokes on one complete rotation of said plunger with the plunger stroke varying with the angular position of said cam to increase plunger stroke with increasing throttle opening, a pair of inlet ports for receiving oil open to said bore at diametrically opposite locations in the path of rotary motion of said plunger, a pair of outlet ports for delivering oil to lubricate said gas seals open to said bore at diametrically opposite locations in the path of rotary motion of said plunger, said plunger having an external relieved portion cooperating with said bore to define a passage for successively connecting one of said inlet ports to said chamber when said chamber is expanding and said chamber to one of said outlet ports when said chamber is contracting during one-half of a plunger revolution and also for successively connecting the other of said inlet ports to said chamber when said chamber is expanding and said chamber to the other of said outlet ports when said chamber is contracting during the remaining one-half of a plunger revolution.

Claim 5

An oil metering pump for a rotary engine having gas seals, an output shaft and a throttle, said pump comprising a pump body having a stepped diameter bore, a stepped diameter plunger having a large diameter land and a small diameter land reciprocably and rotatably mounted in said bore and cooperating therewith to provide a variable volume chamber between the steps of said bore and said plunger having a displacement determined by the extent of plunger stroke, means drivingly connecting said output shaft to rotate said plunger while permitting said plunger to reciprocate, a cam pivotably mounted in said pump body, means operatively connecting said throttle to vary the angular position of said cam with the opening of said throttle said plunger having a cam follower at one end contactable with said cam, a spring arranged in said bore between said plunger and said pump body for continuously biasing said cam follower to follow said cam, said cam and said spring biased cam follower cooperating to effect reciprocal plunger movement on rotation of said plunger with the plunger stroke varying with the angular position of said cam, to increase plunger stroke with increasing throttle opening, an inlet port for receiving oil open to said bore in the path of rotary motion of said large diameter land of said plunger, an outlet port for delivering oil to lubricate said gas seals open to said bore in the path of rotary motion of said large diameter land of said plunger, and said large diameter land of said plunger having a relieved portion openable to said ports throughout the range of plunger stroke cooperating with said bore to define a passage for successively connecting said inlet port to said chamber when said chamber is expanding and said chamber to said outlet port when said chamber is contracting during one plunger revolution.

Claim 6

An oil metering pump for a rotary engine having gas seals, an output shaft and a throttle, said pump comprising a pump body having a stepped diameter bore, a stepped diameter plunger having a large diameter land and a small diameter land reciprocably and rotatably mounted in said bore and cooperating therewith to provide a variable volume chamber between the steps of said bore and said plunger having a displacement determined by the extent of plunger stroke, means drivingly connecting said output shaft to rotate said plunger while permitting said plunger to reciprocate, a cam pivotably mounted in said pump body, means operatively connecting said throttle to vary the angular position of said cam with the opening of said throttle said plunger having a cam follower at one end contactable with said cam, a spring arranged in said bore between said plunger and said pump body for continuously biasing said cam follower to follow said cam, said cam and said spring biased cam follower cooperating to effect reciprocal plunger movement on rotation of said plunger with the plunger stroke varying with the angular position of said cam, to increase plunger stroke with increasing throttle opening, an inlet port for receiving oil open to said bore in the path of rotary motion of said large diameter land of said plunger, an outlet port for delivering oil to lubricate said gas seals open to said bore in the path of rotary motion of said large diameter land of said plunger, and said large diameter land of said plunger having a relieved portion openable to said ports throughout the range of plunger stroke cooperating with said bore to define a passage for successively connecting said inlet port to said chamber when said chamber is expanding and said chamber to said outlet port when said chamber is contracting during one plunger revolution.