Screwdriver bits

Details Screwdriver bits Screwdriver bits

2007-01-30

2007-01-30

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S436000

Reexamination Certificate

active

10441135

ABSTRACT:
The invention pertains to a screwdriver bit with a drive section (14) and a front section (1) that contains a profiled penetrating section (2) and is manufactured by compression molding and subsequently sintering a hard metal powder, where the front section is connected to the drive section. Thus, according to the invention, the length of the front section (1) is not greater than 2.5-times the length of the penetrating section (2) and/or the ratio of the length of the front section (1) to the diameter or the width across corners of the penetrating section (2) is not greater than 2.2 (FIG.7).

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patent: WO 01/66312 (2001-09-01), None

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