Solenoid operated hydraulic control valve
US4988967A · kind A · utility
28Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2500/106
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A solenoid operated hydraulic control valve which has a specially ported spool valve to statically balance spool force in the opened and closed positions, and a specially designed solenoid operator which includes very small ratios of gaps to cross-sectional areas for the working and non-working gaps between the armature and stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.