Hydraulic control valve
US4022425A · kind A · utility
10Cited by
4References
2Claims
0Family size
Inventors
Key dates
| Filing date | Oct 3, 1975 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Oct 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a hydraulic control valve a spool accommodating bore of a valve body has eccentric circular grooves. Hydraulic resistance to the fluid flow in shallow portion of the grooves is more than that in deep portions, owing to which the fluid flow by-passes the high-resistance zones in the shallow portions, so that the total hydraulic resistance and the path of the fluid flow through the valve is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.