Clutch type screwdriver

Details Clutch type screwdriver Clutch type screwdriver

2007-04-24

2007-04-24

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S063100

Reexamination Certificate

active

11295772

ABSTRACT:
A screwdriver includes a clutch mechanism, a handle mounted on a first end of the clutch mechanism, and a replaceable screwdriver tip mounted on a second end of the clutch mechanism. The clutch mechanism includes a mounting seat, an annular sleeve, a positioning member, first and second limit units, a press member, a rotation disk, and a threaded sleeve. Thus, the handle can be rotated to drive the screwdriver tip to rotate in two opposite directions and to rotate in one direction only, thereby facilitating a user operating the screwdriver tip. In addition, the user only needs to rotate the rotation disk to change the operation direction of the screwdriver, thereby facilitating the user operating the screwdriver.

REFERENCES:
patent: 1474798 (1923-11-01), Stark
patent: 5737982 (1998-04-01), Lin
patent: 6047617 (2000-04-01), Chen
patent: 6058812 (2000-05-01), Casel et al.
patent: 6568693 (2003-05-01), Glass
patent: 6935211 (2005-08-01), Chen
patent: 7036398 (2006-05-01), Chen
patent: 7055411 (2006-06-01), Huang
patent: 2005/0155462 (2005-07-01), Chen
patent: 2005/0193870 (2005-09-01), Chen

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