Double open-end claded-head wrench

Details Double open-end claded-head wrench Double open-end claded-head wrench

2006-10-10

2006-10-10

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

C081S119000

Reexamination Certificate

active

07117767

ABSTRACT:
A double open-end claded-head wrench (10) that is particularly designed to loosen and tighten hexagon bolts and nuts that are made of a relatively soft metal such as aluminum. The wrench (10) is made of aluminum and includes a wrench handle (12), a first open-end head (28), and a second open-end head (56), a notch (50) that is cut into the corners of each of the wrenches hexagon angles, and a stainless steel head clad (80–86) that covers the upper and lower surfaces (14,16) of the first and second open end heads (28,56). The notches prevent the corners of the aluminum bolts or nuts from being worn by the gripping pressure applied by the heads of the wrench (10). The stainless steel claded heads (28,56) protect the wrench heads (28,56) from being worn from repeated uses of the wrench (10).

REFERENCES:
patent: 3709073 (1973-01-01), Kurtz
patent: 6202515 (2001-03-01), Denton
patent: 6276241 (2001-08-01), Cornog et al.
patent: 6354175 (2002-03-01), Dobson et al.
patent: D476204 (2003-06-01), Chang-Kao
patent: 6820521 (2004-11-01), Dobson et al.
patent: 2002/0011136 (2002-01-01), Eggert et al.

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