Power stage servo valve for a seismic vibrator
US4442755A · kind A · utility
11Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1982 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Jan 25, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86638
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power stage servo valve for a seismic vibrator includes a stationary orifice plate defining a plurality of valve ports having a first shape. A rotary orifice plate, abutting the stationary orifice plate, defines a like plurality of valve ports that have a shape different from the valve ports in the stationary orifice plate. The configuration and shape of the rotary valve ports is such that the valve opens more quickly than it shuts off when the plate is rotating continuously in one direction at a desired angular velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.