Power tong apparatus for making and breaking connections between lengths of small diameter tubing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 27, 1981
Grant Date -
N/A
app pub date -
Oct 9, 1979
filing date -
Oct 9, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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