US PATENT SUBCLASS 73 / 862.25
.~.~.~.~ Power tongs

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

862  DF  DYNAMOMETERS {5}
862.08  DF  .~ Responsive to torque {2}
862.191  DF  .~.~ During transmission to an external load {11}
862.21  DF  .~.~.~ For making or breaking threaded connections (e.g., torque measuring wrenches) {4}
862.25.~.~.~.~ Power tongs

DEFINITION

Classification: 73/862.25

Power tongs:

(under subclass 862.21) Subject matter wherein the tool comprises power means for screwing or unscrewing sections of a tubular assembly.

(1) Note. Most tubular assemblies in this subclass comprise threaded sections of drill pipe, casing, tubing, and rods used in the drilling and operation of wells.