Servo valve having a piezoelectric element as a control motor
US4959581A · kind A · utility
40Cited by
11References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86622
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control motor for a servo valve is provided. The control motor comprises a control element which can carry out a pivotal movement due to an electric input signal supplied to said motor. The movement of the control element causes a corresponding change of hydraulic resistances and, as a consequence, changes in hydraulic output signals of an hydraulic amplifier actuated by said motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.