Hydraulic pump with pistons and controlled suction valves
US4629400A · kind A · utility
2Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Nov 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86405
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic pump comprising at least a reciprocating piston, each piston being associated with one suction valve returned to its closing position by a return spring. The return spring is associated on the one hand with the valve and on the other hand with a push-piece cyclically actuated by a cam driven by the pump driving shaft in such manner that the action of the spring on the suction valve is cancelled during the suction phase and reestablished at the end of the suction phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.