US 6,981,434 B2
Reinforcement structure for wrench head
Terence Chen, No. 325, Yungching Rd., Dungshan Shiang, Ilan (Taiwan)
Filed on May 27, 2004, as Appl. No. 10/854,344.
Application 10/854344 is a continuation in part of application No. 10/428114, filed on May 02, 2003, granted, now 6,857,339.
Prior Publication US 2004/0216564 A1, Nov. 04, 2004
Int. Cl. B25B 13/46 (2006.01)
U.S. Cl. 81—63.1 4 Claims
OG exemplary drawing
 
1. A wrench (10) comprising:
a head (11) having a through hole (12) defined therethrough and a recess (14) defined in an inner periphery of the through hole (12), a recessed area (13) defined in a surface of the head (11) and a bridge portion (16) located between the through hole (12) and the recessed area (13), a space (17) defined in an underside of the bridge portion (16) and in communication with the through hole (12);
an engaging wheel (20) rotatably received in the through hole (12);
two pawls (30) and a spring (31) connected between the two pawls (30), the two pawls (30) movably received in the recess (14), each pawl (30) having a protrusion (303) which extends into the recessed area (13), and
a control member (40) rotatably received in the recessed area (13) and having a concavity (412) in which the two protrusions (303) are retained, the two pawls (30) being moved when the control member (40) is rotated.