Reversible rachet wrench with integrated dual pawl and spring and cam unit
US5174176A · kind A · utility
31Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A reversible ratchet wrench has a housing containing a ratchet wheel and a reversing pawl unit which includes two pawls respectively connected by leaf springs to a pivotally mounted reversing cam, all in a unitary one-piece construction. The reversing pawl unit is pivotally movable by a reversing lever between first and second conditions, wherein the two pawls respectively engage the ratchet wheel for accommodating rotation thereof in opposite directions. The reversing lever has a cam follower which cammingly engages a cam surface on the housing to resiliently hold the reversing lever in the selected one of its two positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.