Tandem fixed displacement pump with torque control
US6293765A · kind A · utility
7Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/781
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A tandem fixed displacement pump circuit with torque control includes first and second pumps that draw fluid from a reservoir to supply respective load circuits, pressure relief valves for each of the load circuits, and a pilot operated sequence valve that monitors the pressure for each of the circuits and reduces the pressure of one of the circuits as the pressure in the other circuit rises. The sequence valve modulates to control the pressure in the secondary priority circuit so that a predetermined input torque value is not exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.