Apparatus to eliminate back drive in push pull system of rotor aircraft and related methods
US8739679B2 · kind B2 · utility
2Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2012 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Nov 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7838
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Apparatus and methods for eliminating back drive in a push pull type control system, are provided. An exemplary apparatus includes a control rod including a pair of spaced apart piston displacement members each configured to carry a check valve. The apparatus also includes a pair of opposite-face check valves each configured to seal against respective opposing face of a piston head to form a hydraulic lock, preventing back drive in the control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.