Variable displacement hydraulic pump with quiet timing
US5230274A · kind A · utility
12Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1992 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Feb 11, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/2042
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid pressure energy translating device of the rotary, variable displacement type having a timing device providing gradual rise and reduction of pressure between the cylinder bores and the inlet and outlet ports. The timing device is in the form of a valve plate having a metering groove with a double notch design which exits into an associated outlet port, and a long single "V" notch metering groove which exits into a associated inlet port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.