Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1989-01-04
1990-02-27
Hartman, Judy
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
81 632, B25B 1346
Patent
active
049035541
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 spring biaser (44) operates on the pawl to maintain the pawl teeth (40a or 40b) in engagement with the ratchet teeth (30) on the driver (26) in order to provide locking in one direction and ratcheting in the other direction.
REFERENCES:
patent: 2764048 (1956-09-01), Thompson
patent: 2891434 (1959-06-01), Lozensky
patent: 2957377 (1960-10-01), Hare
patent: 3713356 (1973-01-01), Knudsen
patent: 4274311 (1981-06-01), Ebert
patent: 4485700 (1984-12-01), Colvin
patent: 4631988 (1986-12-01), Colvin
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