Variable volume liquid pumping system
US3975910A · kind A · utility
Inventor
Key dates
| Filing date | Mar 12, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Mar 12, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/07
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary input shaft is provided having an axially shiftable cam mounted thereon including circumferentially spaced and axially tapering cam lobes. A pair of reciprocating piston oil pumps are provided and include piston actuating followers engaged with the cam and operable thereby to pump oil through the pumps. An oil turbine is also provided and oil lines extend to and from the turbine from the pumps whereby operation of the pumps will cause oil to be pumped through the turbine which includes a rotary output shaft. By axially shifting the cam on the rotary input shaft the volume of oil pumped by the pumps during each cycle of operation thereof is varied whereby the input of oil to the turbine is similarly varied. The hydraulic system connecting the pumps to the turbine includes oil reservoir means from which oil may be admitted into the working portion of the system and into which oil from the working portion of the system may be withdrawn. Further, structure is provided for expressing oil from the reservoir in response to shifting of the cam to increase the discharge from the pumps and to withdraw oil from the working portion of the hydraulic system into the reservoir in respons…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.