Hydraulic servo valve
US4342334A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Apr 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87209
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic servo valve suitable for controlling flow of a pressurized fluid in dirty and explosive environments, comprises a control valve actuated by a contamination-free sealed pilot circuit of electroviscous fluid commanded by electroviscous valves requiring minimal electrical power. Fluid is circulated in the pilot circuit by pressure pulses derived from the pressurized fluid by means of a fluidic oscillator and transmitted to the pilot circuit via flexible diaphragms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.