Full authority propeller pitch control
US5364231A · kind A · utility
22Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Dec 22, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/38
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control for a hydraulic propeller pitch actuator includes a low power pilot valve responsive to digital electronic input signals to control movement of a hydraulic servomotor driving a higher power servovalve. Negative feedback motion is delivered from the servomotor to both the pilot valve and the servovalve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.