Direct-drive type electro-hydraulic servo valve
US4648580A · kind A · utility
14Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1986 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Mar 20, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86622
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a direct-drive type electro-hydraulic servo valve in which dynamic characteristics of a spool are simulated by an electronic circuit or a computor to derive a signal representative of the spool velocity and the derived signal is negatively fed back to an input of a power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.