Combination of screw and screw driver bit and header punch...

Details Combination of screw and screw driver bit and header punch... Combination of screw and screw driver bit and header punch...

2005-05-03

2005-05-03

Smith, James G. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S436000, C411S404000

Reexamination Certificate

active

06886433

ABSTRACT:
A combination of a screw and a screw driver bit and a header punch for its manufacture capable of effectively preventing a come-out phenomenon of the screw driver bit by improving the structure of a groove part in a cross groove part in a cross groove of a screw to prevent a conventional damage.

REFERENCES:
patent: 2216381 (1940-10-01), West et al.
patent: 4084478 (1978-04-01), Simmons
patent: 6341546 (2002-01-01), Totsu
patent: 6378406 (2002-04-01), Totsu
patent: 6393953 (2002-05-01), Totsu
patent: 6584876 (2003-07-01), Totsu
patent: 48-1552 (1973-01-01), None
patent: 49-21720 (1974-06-01), None
patent: 52-032454 (1977-03-01), None
patent: 56-44208 (1981-04-01), None
patent: 3-292407 (1991-12-01), None
patent: 08-145024 (1996-06-01), None

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