Electrical system for driving a propeller pitch change mechanism
US8167553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/44
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system adjusts the pitch of a variable pitch propeller having a non-rotating side and a rotating side. The rotating side of the propeller has a hub, a propeller blade mounted to the hub, a propeller shaft that rotates the hub and propeller blade, and an actuation system. The actuation system has a screw and a piston. A motor has a non-rotating component in communication with the non-rotating side of the propeller and a rotating component in communication with the actuation system. When the motor increases speed, the screw rotates and the piston moves laterally in a first axial direction to decrease the pitch of the propeller and, when the motor decreases speed, the screw rotates and the piston moves laterally in a second axial direction to increase the pitch of the propeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.