US3672168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump and power transmission system
Assignee: Individual
•
Filing: 1970-11-06
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Granted: 1972-06-27
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Expires: 1990-11-06
Abstract
Abstract A rotary pump and power transmission system in which multiple cam grooves are formed in a rotor and a follower engages in the grooves to form a rotary pump and a rotary motor. A secondary pump is connected in the system to increase the fluid flow to the motor. A four-way reversing valve provides means for reversing the direction of rotation of the motor while continuing to operate the pump in the original direction. A valve is provided in the system actuated by the hydraulic brakes of the vehicle to retard the flow of drive fluid to or from the motor to retard the speed of the vehicle.
Inventors
- 👤 Leonard M Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/08; B60K; B60K17/00; B60K17/04; B60K17/10; F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/044; F15B11/0445; F16; F16D; F16D57/00; F16D57/06; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/415; F15B2211/41509; F15B2211/45; F15B2211/70; F15B2211/705; F15B2211/7058
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A rotary displacement pump comprising a housing, a rotor mounted in said housing, a pair of spaced apart parallel cam shaped displacement grooves formed in the peripheral surface of said rotor arranged with the deepest portion of each groove aligned with the shallowest portion of the adjacent groove, and a spring pressed piston follower on said housing engaging in each of said grooves, said housing having inlet and outlet ports for each groove on opposite sides of the piston engaging in each groove.
Claim 2
Dependent Claim
83 words
A rotary displacement pump comprising a housing, a rotor mounted in said housing, a pair of spaced apart parallel cam shaped displacement grooves formed in the peripheral surface of said rotor arranged with the deepest portion of each groove aligned with the shallowest portion of the adjacent groove, and a spring pressed piston follower on said housing engaging in each of said grooves, said housing having inlet and outlet ports for each groove on opposite sides of the piston engaging in each groove.
Claim 3
Dependent Claim
150 words
A hydraulic power transmission system comprising a rotary displacement pump, a rotary displacement motor, means communicating said pump and said motor for conducting fluid from said pump to said motor and from said motor back to said pump, means for reversing the direction of flow of fluid from said pump to said motor to effect a reversal of rotation of said motor, a valve in the means connecting said pump and said motor, brake means for actuating said valve for controlling the flow of fluid to and from said motor, a cylinder in each said pump and said motor, a cylindrical rotor mounted for rotation in each said cylinder, a pair of spaced apart parallel cam shaped displacement grooves formed in each of said rotors, and a spring pressed piston follower mounted on each of said cylinders and engaged in each of said grooves to form a moving barrier therein.
Claim 4
Dependent Claim
150 words
A hydraulic power transmission system comprising a rotary displacement pump, a rotary displacement motor, means communicating said pump and said motor for conducting fluid from said pump to said motor and from said motor back to said pump, means for reversing the direction of flow of fluid from said pump to said motor to effect a reversal of rotation of said motor, a valve in the means connecting said pump and said motor, brake means for actuating said valve for controlling the flow of fluid to and from said motor, a cylinder in each said pump and said motor, a cylindrical rotor mounted for rotation in each said cylinder, a pair of spaced apart parallel cam shaped displacement grooves formed in each of said rotors, and a spring pressed piston follower mounted on each of said cylinders and engaged in each of said grooves to form a moving barrier therein.
Claim 5
Dependent Claim
39 words
A device as claimed in claim 2 wherein said pair of displacement grooves are arranged with the deepest portions of each groove in each rotor being aligned with the shallowest portion of the adjacent groove in the same rotor.
Claim 6
Dependent Claim
31 words
A device as claimed in claim 3 wherein a pair of rollers are mounted on each of said piston followers for rolling engagement in the bottom of each of said grooves.
Claim 7
Dependent Claim
35 words
A device as claimed in claim 2 wherein two pair of cam shaped displacement grooves are formed in the peripheral face of said rotor with each of said grooves having a piston follower engaged therein.
References Cited (Backward Citations)
US1156818A
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US1354777A
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US1770141A
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US1999288A
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US2276895A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |