Ratchet structure for a wrench

Details Ratchet structure for a wrench Ratchet structure for a wrench

2007-09-04

2007-09-04

Meislin, D. S. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C192S043200

Reexamination Certificate

active

11428773

ABSTRACT:
A ratchet structure of a wrench includes a handle, a socket, a first detent, a first elastic element, a second detent, a second elastic element, a lid and a knob. The outer periphery of the socket is formed with gear teeth. The socket is accommodated in the handle. The first and second detents and the first and second elastic elements are also accommodated in the handle, respectively. Each of the first and second detents is provided with gear teeth and a stud. The lid is secured to the handle and covers the detents and the elastic elements. The knob is pivotally connected to the handle. By turning the knob, the studs are linked to turn to change the turning direction of the socket.

REFERENCES:
patent: 657512 (1900-09-01), Carter et al.
patent: 849230 (1907-04-01), Gobel
patent: 973779 (1910-10-01), Hansen
patent: 1050312 (1913-01-01), Stenersen
patent: 1890213 (1932-12-01), Cameron et al.
patent: 2193984 (1940-03-01), Rhinevault
patent: 5174176 (1992-12-01), Krivec
patent: 5501124 (1996-03-01), Ashby
patent: 5622089 (1997-04-01), Gifford, Sr.
patent: 6308594 (2001-10-01), Cheng
patent: 7146881 (2006-12-01), Chang
patent: 2006/0090608 (2006-05-01), Tsai

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