Surface conforming, torque enhancing wrench

Details Surface conforming, torque enhancing wrench Surface conforming, torque enhancing wrench

1991-11-07

1992-07-21

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

811211, 811243, 811247, 81186, B25B 1302

Patent

active

051313120

ABSTRACT:
The present invention involves a wrench for tightening and loosening bolts, nuts and fasteners having n number of equal length outside working surfaces. The wrench has a working wrench head with an orifice which contains at least two pairs of flat inside working surfaces. The pairs of inside working surfaces are arranged about and equidistant from an imaginary central axis through the orifice, and the surfaces of each pair form a surface contact angle a with one another. A handle which, is removably or permanently connected to the working wrench head and adapted for rotation of the working wrench head. In one preferred embodiment, the wrench has at least two pairs of surface contact angles that are directly opposite one another.

REFERENCES:
patent: 3125910 (1964-03-24), Kavalar
patent: 3247775 (1966-03-29), Hinkle
patent: 3414090 (1966-03-22), Raptis
patent: 3695124 (1972-10-03), Myers
patent: 3881377 (1975-05-01), Evans et al.
patent: 4361412 (1982-11-01), Stolarczyk
patent: 4512220 (1985-04-01), Barnhill et al.
patent: 4598616 (1986-07-01), Colvin
patent: 4882957 (1989-11-01), Wright et al.

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