Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1995-02-27
1996-05-28
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5718, 81 5734, B25B 1350
Patent
active
055200729
ABSTRACT:
A tong apparatus is provided for gripping a pipe. The apparatus includes a base, and a support rigidly coupled to the base. The support is formed to include an aperture for receiving the pipe. The apparatus also includes a plurality of rollers rotatably coupled to the support adjacent the aperture. Each roller includes a plurality of teeth configured to engage the pipe. The apparatus further includes a movable actuator coupled to the support, and a plurality of wedge plates rigidly coupled to the actuator. Each wedge plate includes a plurality of teeth configured to engage the teeth of a corresponding roller to force the rollers radially inwardly against the pipe to grip the pipe upon movement of the actuator relative to the support. The apparatus still further includes a cylinder having a piston coupled to the actuator. The piston is movable from an extended position to a retracted position to move the actuator relative to the support.
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