Power tongs

Details Power tongs Power tongs

1982-03-29

1984-05-01

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 572, 81 5721, B25B 1700

Patent

active

044454031

ABSTRACT:
A power tong which includes a frame and a pipe-gripping mechanism associated with a throat at one end of the frame. Power is transmitted to the pipe-gripping mechanism from a power unit through a drive train. The pipe-gripping mechanism cooperates with the throat to receive a pipe section to be rotated and includes a partial ring rotatably mounted within the frame and having an opening which may be aligned with the throat. The ring may be rotated in either direction by the power unit. Mounted on the tong is a die carrier which is rotatable relative to the ring. A pair of graphite impregnated polyurethane bearing quadrants are provided to facilitate rotation of the ring upon the frame, and graphite impregnated polyurethane bearing rings are provided to facilitate relative rotation between the die carrier and the partial ring.

REFERENCES:
patent: 4084453 (1978-04-01), Eckel
patent: 4215602 (1980-08-01), Carstensen et al.
patent: 4266450 (1981-05-01), Farr et al.
patent: 4291598 (1981-09-01), Cherry

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