Friction clutch hand tool
US5509332A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/462
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A friction clutch hand tool in the style of a socket wrench for tightening and loosening common mechanical fasteners. Socket may be received from either side into a cylindrical opening through the wrench head. Once received inside the head, socket is gripped by rollers held captive within notches provided in cylindrical wall of opening in wrench head. Rollers grip outside surface of socket directly. Rotation of head relative to socket causes rollers to roll up ramps out of notches and wedge tight against socket, thereby simultaneously imparting torsion to fastener while clamping socket down on fastener. Socket may be assembled around fastener from multiple interlocking pieces. Socket may also be hollow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.