Hex head wrench

Details Hex head wrench Hex head wrench

1997-06-06

1999-02-23

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81186, 81461, B25B 1348

Patent

active

058732900

ABSTRACT:
A hexagonal head wrench having a body, six sides and six corners. A protuberance is formed on each corner. Each protuberance has two oppositely oriented flank members angled at a predetermined angle outwardly and away from each corner. Engagement of the wrench with a fastener occurs on a portion of each respective flank member distal from the corner. Continued application of torque progressively radially engages each flank member with the fastener.

REFERENCES:
patent: 2083092 (1937-06-01), Richer
patent: 3658105 (1972-04-01), Burt et al.
patent: 4269246 (1981-05-01), Larson et al.
patent: 4338835 (1982-07-01), Simons
patent: 4361412 (1982-11-01), Stolarczyk
patent: 4625598 (1986-12-01), Wolfram
patent: 5259279 (1993-11-01), Strauch
patent: 5279190 (1994-01-01), Goss et al.
patent: 5284075 (1994-02-01), Strauch et al.

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