Overspeed protection system for aircraft fan engine
US4986734A · kind A · utility
4Cited by
18References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An overspeed protection system for an aircraft fan engine wherein blades are rotatable from a coarse pitch to a fine pitch to a thrust-reverse condition. A wobbler-type hydraulic motor is provided for rotating the blade. An overspeed governor is operatively associated with the motor for effecting rotation of the blades in a direction toward the coarse pitch condition. A control, including a solenoid valve actuatable in thrust-reverse mode, changes the sense of the hydraulic motor to drive the motor further into thrust-reverse on actuation of the overspeed governor means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.