Negative torque sensor for a gas turbine engine
US3973873A · kind A · utility
11Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1975 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Apr 4, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A negative torque sensing and control system is disclosed which is useful with a differential geared or fixed shaft gas turbine engine of the type installed in general aviation aircraft. Negative torque is sensed in the gear train between the propeller and the aircraft engine whenever there is a powerplant failure. When the reverse torque exceeds a selected threshold, hydraulic valves are actuated which remove oil pressure from the pitch control mechanism of the propeller. Loss of oil pressure causes the propeller to assume the feathered position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.