Variable displacement pump system
US4518319A · kind A · utility
4Cited by
12References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1984 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Feb 3, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87185
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in series between the displacement control valve and the pistons. When an override pressure is achieved, the override valve blocks communication of the control valve with the pair of pistons and communicates the pump workports directly to the pistons for rapid destroking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.