US PATENT SUBCLASS 464 / 20
.~ Including member deformable by relative movement between shafts

Current as of: June, 1999
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464 /   HD   ROTARY SHAFTS, GUDGEONS, HOUSINGS, AND FLEXIBLE COUPLINGS FOR ROTARY SHAFTS

18  DF  FLEXIBLE COUPLING BETWEEN FLUID-CONDUCTING ROTARY SHAFTS (E.G., COUPLING BETWEEN SECTIONS OF DRILL STRING, ETC.) {2}
20.~ Including member deformable by relative movement between shafts {1}
21  DF  .~.~> Member is coiled spring

DEFINITION

Classification: 464/20

Including member deformable by relative movement between shafts:

(under subclass 18) Subject matter and further including a part which is deformed when one of said shafts moves relative to the other of said shafts.