Internal wrench

Details Internal wrench Internal wrench

1991-03-19

1992-12-22

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

411 2, 81185, 81461, B25B 1500

Patent

active

051726157

ABSTRACT:
An internal wrench has a body having an internal hole of a polygon shape and an outer surface of a polygon shape which conforms to the internal wrenching surface of the part to be wrenched. The wrench body is provided with a shoulder for locating the wrench in a proper drive engagment position.

REFERENCES:
patent: 3241408 (1966-03-01), McCauley
patent: 3460428 (1969-08-01), Charles
patent: 3875829 (1975-04-01), Evans et al.
patent: 4149434 (1979-04-01), Wilson
patent: 4480513 (1984-11-01), McCauley et al.
patent: 4584914 (1986-04-01), Hall et al.

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