Post pressure compensated unitary hydraulic valve
US4693272A · kind A · utility
34Cited by
20References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87169
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pressure compensated hydraulic valve (2) is provided with a housing (4) having a reciprocal spool (6) for communicating hydraulic fluid to work ports (8,10). Pressure compensating means (58) is provided in the same housing with the valve and senses work port pressure by hydraulic fluid flow through the spool from the work port and creates a substantially fixed differential pressure across the spool by controlling the pressure after the flow has passed through the spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.