Power tong with sliding jaw

Details Power tong with sliding jaw Power tong with sliding jaw

2007-08-14

2007-08-14

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057180, C081S057210

Reexamination Certificate

active

10534183

ABSTRACT:
A power tong (1) or back-up tong has a sliding jaw assembly (6) that may be advanced into the throat (4) of the tong for engagement with a pipe. A camming surface (11) on the inside circumference of the ring gear (10) advances the sliding jaw assembly into full engagement with the well pipe when the ring gear (10) is rotated with respect to the jaw assembly.

REFERENCES:
patent: 3847040 (1974-11-01), Bufkin
patent: 4084453 (1978-04-01), Eckel
patent: 4089240 (1978-05-01), Eckel
patent: 4250773 (1981-02-01), Haynes et al.
patent: 4326435 (1982-04-01), Guillot et al.
patent: 4836064 (1989-06-01), Slator
patent: 5819605 (1998-10-01), Buck et al.
patent: 5904075 (1999-05-01), Buck
patent: 2003/0177870 (2003-09-01), Neves et al.

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