Torque limiting ratchet device
US8757035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Sep 11, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A ratchet tool, including a shaft defining a longitudinal axis; a handle coaxial to the shaft; a first gear immovably fixed to the shaft and disposed in the handle; a second gear rotatably and longitudinally movable with respect to the shaft, where the second gear engages the first gear to limit torque transfer from the handle to the shaft in a first direction and provides substantially zero torque transfer in a second direction; a first spring disposed between the second gear and the handle; a third gear rotatably and longitudinally movable with respect to the shaft, where the third gear engages the first gear to limit torque transfer from the handle to the shaft in the second direction and provides substantially zero torque transfer in the first direction; and a second spring disposed between the third gear and the handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.