No-back device having malfunction detection
US8146858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2005 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Jun 23, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2133
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a no-back device for a mobile element actuating device including a screw shaft having first and second braking means each comprising a ratchet wheel. These ratchet wheels are mounted opposite one another so that the first braking means are adapted to resist an unwanted movement of the screw shaft in a first direction, and the second braking means are adapted to resist an unwanted movement of the screw shaft in an opposite direction. The no-back device also includes means for detecting the state of the rotation of the ratchet wheels and indicating means for furnishing, according to the state of the rotation of the wheels, an indication concerning the operating state of the no-back device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.