Wrench having a greater driving strength

Details Wrench having a greater driving strength Wrench having a greater driving strength

1993-04-23

1994-03-22

Watson, Robert C.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

8117785, B25B 2316

Patent

active

052954226

ABSTRACT:
A wrench for driving an object includes a circular engaging surface formed in a head portion, a number of ribs are formed in the circular engaging surface and extended radially inwards of the engaging surface, and the object includes a number of depressions for receiving the ribs such that the contact area between the ribs and the depressions are increased when the object is driven by the wrench.

REFERENCES:
patent: 2651230 (1953-09-01), Waterval
patent: 3908489 (1975-09-01), Yamamoto et al.
patent: 4535658 (1985-08-01), Molinari

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