Jaw assembly

Details Jaw assembly Jaw assembly

1997-02-25

1999-06-15

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5718, 81 572, B25B 1350

Patent

active

059117966

ABSTRACT:
The present invention provides a jaw assembly and die insert for use in conventional power tongs, back-up power tongs, and similar tools. The die insert has a rear surface having a plurality of splines extending outwardly from the rear surface and forming a plurality of grooves between the splines. The die also has a front surface adapted to grip a tubular member and a keyway formed on the rear surface. A mating jaw member is provided which also has a front face of splines and grooves with a keyway which aligns with the die's keyway when the die is inserted into the jaw. A key is inserted into this combined keyway to prevent vertical forces from drawing the die out of the jaw member.

REFERENCES:
patent: 1371943 (1921-03-01), Sperduti
patent: 2637236 (1953-05-01), Vergnani et al.
patent: 2656751 (1953-10-01), Johnson et al.
patent: 2714321 (1955-08-01), Tamplin
patent: 3021149 (1962-02-01), Griffin
patent: 3365762 (1968-01-01), Spiri
patent: 4576067 (1986-03-01), Buck

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