Quiet wrench
US10335928B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Feb 16, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0007
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides a wrench comprising a handle, having a cylindrical inner surface as a first surface; a torque output member, arranged within the first surface of the handle, the torque output member having a cylindrical outer surface as a second surface; one or more wedging member(s), arranged between the first surface and the second surface; varied distance being between the first surface and the second surface, so that the wedge members can prevent the rotation of the first surface relative to the second surface in a predetermined direction. The wrench according to the present invention adopts wedge member to prevent the rotation of the handle relative to the torque output member. When the handle idles relative to the torque output member, only the wedge member will leave the stop position and no sound will be made. Such a wrench is a quiet wrench. Adopting such a configuration not only can reduce wearing of the wrench, extend the service life of the wrench, and improve the user's experience. Providing pre-tightening force can effectively reduce the interval and make the operation smoother.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.