Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Reexamination Certificate
2011-08-09
2011-08-09
Meislin, Debra S (Department: 3727)
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
Reexamination Certificate
active
07992471
ABSTRACT:
A positioning apparatus for hand tool includes a shank, a driving head, a switch, and a positioning device. The shank has a connecting end having a receiving space and a slot communicated with the receiving space. The driving head has multiple positioning holes. The switch includes a screw. The positioning device is received in the receiving space. The positioning device includes a spring, a pusher, and a base. The base is received in the receiving space. The base has a recess for receiving the spring and the pusher and a slot communicated with the recess. The spring has one end abutting against a bottom of the recess and the other end abutting against the pusher. The screw passes the switch and fastens with the pusher via the slot in the shank and the slot in the base. The pusher selectively engages with one of the multiple positioning holes.
REFERENCES:
patent: 6167787 (2001-01-01), Jarvis
patent: 6220125 (2001-04-01), Lan
patent: 7174815 (2007-02-01), Hsieh
patent: 7472631 (2009-01-01), Wu
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