Power wrench apparatus having a positive sliding clamp

Details Power wrench apparatus having a positive sliding clamp Power wrench apparatus having a positive sliding clamp

1995-12-27

1998-04-21

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5736, 81 5741, B25B 1350

Patent

active

057407037

ABSTRACT:
A tong apparatus is provided for gripping a pipe. The apparatus includes a support having a track, a first positive stop, and a second positive stop. The apparatus also includes a jaw assembly having a base slidably coupled to the track of the support. The jaw assembly includes a cylinder having a movable piston. The cylinder is rigidly coupled to the base. The jaw assembly also includes a clamp for gripping the pipe. The clamp has a first jaw coupled to the movable piston and a second jaw coupled to the base. The first jaw has at least one stop located between the first and second positive stops of the support so that when the piston is extended from the cylinder the first jaw initially moves toward the second jaw until the first jaw engages the first positive stop. Further extension of the piston causes the base, the cylinder, and the second jaw to move relative to the support toward the first jaw until the second jaw engages the pipe to grip the pipe and prevent rotation of the pipe relative to the jaw assembly.

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