Power tong for making up or breaking out threaded joints of pipe

Details Power tong for making up or breaking out threaded joints of pipe Power tong for making up or breaking out threaded joints of pipe

1992-02-04

1992-09-29

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 572, B25B 2100

Patent

active

051506386

ABSTRACT:
There are disclosed several embodiments of a power tong for making up or breaking out threaded joints of pipe wherein a head is rotatably mounted on a housing which is held against rotation and both the head and housing have slots adapted to be aligned to permit the tong to be moved onto or removed from a pipe joint. One or more belts are mounted on the head for movement into and out of positions gripping a substantial length of the circumference of the pipe in order to rotate the pipe with the head. The belt or belts are so moved by a hydraulic cylinder which permits the amount of gripping force to be adjusted.

REFERENCES:
patent: 4604922 (1986-08-01), Soutsos
patent: 4694712 (1987-09-01), Doss
patent: 4712284 (1987-12-01), Coyle, Sr. et al.
patent: 4718314 (1988-01-01), Coyle, Sr. et al.

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