Reversible ratchet wrench with thin head construction
US4903554A · kind A · utility
Inventor
Key dates
| Filing date | Jan 4, 1989 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Jan 4, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B13/463
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A reversible ratchet wrench (10) includes a wrench body (11) having a unitary head (12,12') including a driver opening (20) and pawl recess (24). A driver (26) having a ratchet portion (28) received within the driver opening (20) includes ratchet teeth (30) located between oppositely facing first and second planar surfaces (16,18) of the wrench head. A pawl (38) is received within the pawl recess (24) of the opening (20) and includes pawl teeth (40a,40b) that extend between the first planar surface (16) and a pawl skirt (25) that closes the pawl recess (24) adjacent the second planar surface (8). The ratchet and pawl teeth (30 and 40a,40b) have continuous engagement between the wrench head surfaces (16,18) to selectively lock the driver in one direction and permit ratcheting in the other direction. Driver opening (20) and pawl recess (24) of the wrench head (12) have cylindrical shapes which facilitate manufacturing and the support of both the driver and the pawl upon assembly. A ball (34) of a releasable detent mechanism (35) is provided to secure a socket to a driving tang (32) of the driver (26). A tab (42) of a pawl (38) is provided for changing the direction of locking, and a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.