Power tong apparatus for making and breaking connections between

Details Power tong apparatus for making and breaking connections between Power tong apparatus for making and breaking connections between

1979-10-09

1981-01-27

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5718, B25B 1700

Patent

active

042468094

ABSTRACT:
An improved power tong apparatus for making and breaking connections between lengths of small diameter tubing comprising an annular cage mounted for rotation and on which are pivotally mounted a plurality of pipe-gripping rocker arms, an annular bull gear mounted for rotation in association with the annular cage and having internally positioned rollers mounted in association with the pivotally mounted pipe-gripping rocker arms, and an endless chain assembly or gear for rotating the bull gear, and a slot and pin assembly for restricting the movement of the bull gear with respect to the annular cage for causing the pipe-gripping rocker arms to be movable into an open position to release their grip on the pipe.

REFERENCES:
patent: 2371562 (1945-03-01), Kelley
patent: 3180186 (1965-04-01), Catland
patent: 3261241 (1966-07-01), Catland
patent: 3507174 (1970-04-01), Dickmann

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