Driving surface configuration for hand tools

Details Driving surface configuration for hand tools Driving surface configuration for hand tools

2008-08-10

2010-02-16

Meislin, D. S. (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Jaw faces

C081S119000, C081S121100

Reexamination Certificate

active

07661339

ABSTRACT:
A wrench includes a handle and an open-end with two jaws and each jaw has a driving surface. Each driving surface has a contacting area and two yielding areas. The contacting area is located between the two yielding areas and includes a contact portion and two notches. The contact portion is located between the two notches, and two extension areas each are connected between the yielding area and the notch corresponding thereto. A corner is formed at a joint area of the contact portion and an inside of the notch so as to bite a rounded fastener head. The contact portions are matched with straight sides of a normal fastener head.

REFERENCES:
patent: 5406868 (1995-04-01), Foster
patent: 6145414 (2000-11-01), Hsieh
patent: 7168347 (2007-01-01), Hsieh
patent: 2006/0156869 (2006-07-01), Hsieh

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