Pump control using overpressure source
US8297943B2 · kind B2 · utility
2Cited by
16References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2007 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Nov 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7905
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary positive displacement pump employs the higher pressure available at a region within the rotor chamber after the outlet port to augment the force of a biasing spring in a control system. A biasing spring with a lower spring force can thus be employed in the control system, resulting in a pump pressure output characteristic which can more closely match the operating speed varying working fluid requirements for devices supplied by the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.