Pump control with fluid responsive standby pressure
US4553904A · kind A · utility
12Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump control assembly (16) controls the displacement of a pump (11) and provides a standby pressure (87) that is greater than the difference (96) between the load pressure and the pump discharge pressure. A valve mechanism (38) provides a predetermined pressure signal to a valve member (23) for adding a force to the valve member to provide a control signal to an actuating member (17) which adjusts the pump's flow and pressure to a standby condition. The pump control assembly provides a more precise control of the standby position while eliminating large, bulky springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.