Rotary positioning structure of a ratchet screwdriver

Details Rotary positioning structure of a ratchet screwdriver Rotary positioning structure of a ratchet screwdriver

2008-07-15

2008-07-15

Meislin, D. S (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S177800, C192S043200

Reexamination Certificate

active

07398710

ABSTRACT:
The present invention provides rotary positioning structure of the ratchet screwdriver. The rotary positioning structure includes two radial grooves, penetrating radially between the body of the ratchet screwdriver and the central axle hole. There are two-shaped snappers having a transverse rack and two vertical racks, and each is mounted separately into two radial grooves. The two vertical racks are inserted into two vertical slots. The transverse rack is placed opposite to the top flange of gear of the shaft lever. A flexible locker is used to press down the two-shaped snappers. A rotating drum is mounted and limited externally onto the body, while two troughs are arranged at intervals onto an inner wall of the retaining block opposite to the lower rivet holder, thereby forming a rotary positioning structure and offering a higher stability of positioning and ease-of-operation.

REFERENCES:
patent: 6047802 (2000-04-01), Huang
patent: 6435061 (2002-08-01), Ho
patent: 6450067 (2002-09-01), Liao
patent: 7174810 (2007-02-01), Lin
patent: 7237459 (2007-07-01), Shiao
patent: 2002/0079181 (2002-06-01), Hsiao
patent: 2004/0089109 (2004-05-01), Chen
patent: 2004/0144217 (2004-07-01), Hu
patent: 2004/0177731 (2004-09-01), Chen
patent: 2007/0240544 (2007-10-01), Hu

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