Variable displacement pump
US5356269A · kind A · utility
3Cited by
8References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Aug 17, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/785
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable displacement pump (3) comprises a piston (4) reciprocable within a cylinder (2), a displaceable inlet valve (5) adapted to control admission of lower pressure hydraulic fluid (9) to the swept volume area (10) of the piston (4) and cylinder (2), a displaceable outlet valve (7) adapted to control delivery of higher pressure fluid (9) from the swept volume area (10), and means (13, 13A, 26-28, 29-44) to control the position of the inlet valve (5) so as to control the volume of fluid (9) delivered by the pump (3) in accordance with demand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.