Propeller blade pitch actuation system
US9120559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2012 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jun 13, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/38
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A propeller blade pitch actuation system includes a propeller control module (PCM), a PCM drain line, a first drain line, a drain line restriction, a second drain line, and a valve. The PCM drain line connects to the PCM to drain hydraulic fluid. The first drain line is downstream of the PCM drain line and the drain line restriction is downstream of the first drain line. The second drain line is downstream of the PCM drain line. The valve includes a first valve position and a second valve position. The first valve position connects the PCM drain line to the first drain line and the second valve position connects the PCM drain line to the second drain line. Hydraulic pressure of the first drain line between the valve and the drain line restriction is greater than hydraulic pressure of the second drain line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.