Open end ratchet wrench
US5456143A · kind A · utility
Inventor
Key dates
| Filing date | Mar 29, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Mar 29, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An open-end ratchet wrench has a pair of elongated plates that are pivotally mounted to a pair of spaced jaws on the wrench handle and that include at least one elongated surface for engaging a face of a workpiece onto which the jaws are inserted. A spring mounted on the handle biases the elongated plates toward each other so that the elongated plates grasp the workpiece between the elongated surfaces and rotate the workpiece when said handle is rotated in a first direction. The biasing of the spring is overcome when the handle is rotated in a second, opposite direction so that the elongated surfaces of the plates slide over faces of the workpiece (e.g., in a ratcheting manner), allowing the workpiece to remain stationary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.