Control spool valve
US4531546A · kind A · utility
2Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1985 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Feb 5, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86879
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A spool valve having a pressure inlet port, a work port and a tank port. A spool valve is responsible for selectively communicating the pressure inlet port to the work port and the work port to the tank port. The work port is located between the pressure inlet port and the tank port. The spool contains a passageway which receives fluid from the pressure inlet port and directs the fluid between the work port and the tank port to provide a pressurized fluid seal between the work port and the tank port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.