Wrench with flexible ring
US6988430B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Sep 27, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A ratchet wrench is provided having a flexible ring forming the head where the flexible ring may have serrations on its inner surface and forms a free end having a pawl thereon. The flexible ring is formed as one piece with the handle of the wrench. Upon tightening, the flexible ring will tighten down on a fastener and upon a non-tightening rotation, the pawl will ratchet against the corners of the fastener according to the self energizing geometry of the wrench where an arc is provided on a shoe of the handle which is eccentric to the arc of the flexible ring. In an embodiment, a gear insert is provided within the flexible ring for engagement with the fastener, torquing and ratcheting of the flexible ring being relative to the gear insert. In an embodiment, the a insert may be provided that has a substantially smooth outer surface including circumferential engagement features for engaging a substantially smooth facing surface of the flexible ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.