Positive displacement pump systems with a variable control orifice
US6296456A · kind A · utility
24Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C14/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive displacement pump system has first and second delivery passages for pumped fluid and a main delivery passage receiving flow from the first delivery passage and, via a non return valve, from the second delivery passage. A control valve is provided to apportion flow from the first and second delivery passage to an overspill port. A pressure sensitive control orifice is provided in the main discharge passage to receive the combined flows and the control orifice is of variable size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.