Propeller blade angle control system
US10793256B2 · kind B2 · utility
0Cited by
7References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 2, 2017 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Oct 22, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2220/323
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control circuit for changing the angle of propeller blades includes a propeller pitch change mechanism, and a fixed-displacement pump providing the supply of oil from an engine oil return system. A valve has an outlet port to direct oil from a cavity of the valve, and a pitch port in fluid communication with the pitch change mechanism. A spool of the valve is operable between a first position and a second position to respectively open and close the outlet port, and direct oil flow away from or to the pitch change mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.