Electrohydraulic flow control apparatus
US4236690A · kind A · utility
5Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jan 22, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7764
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
This invention relates to an electrically controlled flow control valve in which it is possible for the pilot fluid pressure which controls the main metering spool to build to full inlet pressure if necessary to initiate movement of the spool. An electrically operated solenoid operates a control poppet which regulates the pressure of the pilot fluid to position the metering spool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.