Hydraulic spool valves with controlled by-pass
US4413650A · kind A · utility
4Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Apr 24, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87185
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic spool valve is provided for controlling the flow of fluid between a pump, a consumer of hydraulic energy and a reservoir which spool has pressure controlled by-pass means by-passing fluid from the fluid inlet of the valve to tank while the valve is moving from a neutral to a work position and the reverse thereof at a pre-selected pressure level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.