Jaws for power tongs and back-up units
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United States of America Patent
Stats
-
Jun 6, 1989
Issued Date -
N/A
app pub date -
Jul 16, 1987
filing date -
Apr 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improvement is made to jaw designs for power tongs and back-up units. The jaw is formed having a cavity whose opening is oriented toward the pipe to be gripped. An elongated die is movably mounted in the cavity effectively closing off the cavity. The die has a gripping surface adapted to contact the pipe. A resilient member, preferably synthetic rubber or other elastomer or a substantially incompressible fluid, is disposed within the cavity adjacent the die. Uneven loads on the die are redistributed through the hydraulic action of the resilient member with a resultant equal distribution of the loads on the die.
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Family
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Cited Art Landscape
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