Ratchet wrench
US9975222B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 25, 2015 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Jun 26, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0028
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A ratchet wrench includes a head with two lugs extending therefrom, and a ratchet wheel and a pawl are received in the head. A handle has a tongue which is pivotably inserted between the two lugs, and a resilient unit is connected to the tongue. The resilient unit is engaged with a concavity in the rear side of the pawl to push the pawl to be engaged with the ratchet wheel. The handle has two blocks on the top and the bottom thereof, each block has two inclined faces which contact the end faces of the two lugs when pivoting the handle. The resilient unit is moved with the tongue so as to change the position of the pawl to decide the ratcheting direction of the ratchet wrench.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.