US PATENT SUBCLASS 464 / 18
FLEXIBLE COUPLING BETWEEN FLUID-CONDUCTING ROTARY SHAFTS (E.G., COUPLING BETWEEN SECTIONS OF DRILL STRING, ETC.)

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

18FLEXIBLE COUPLING BETWEEN FLUID-CONDUCTING ROTARY SHAFTS (E.G., COUPLING BETWEEN SECTIONS OF DRILL STRING, ETC.) {2}
19  DF  .~> Relative angular displacement of axes of shafts
20  DF  .~> Including member deformable by relative movement between shafts {1}

DEFINITION

Classification: 464/18

FLEXIBLE COUPLING BETWEEN FLUID-CONDUCTING ROTARY SHAFTS (E.G., COUPLING BETWEEN SECTIONS OF DRILL STRING, ETC.):

(under the class definition) A flexible coupling for interconnecting plural shafts, said shafts being of tubular construction for conducting a fluid internally of the shaft along the length thereof.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth,

320+, for a tool shaft detail, and see the reference to Class 175 in the search class notes under the class definition of Class 464.

285, Pipe Joints or Couplings, appropriate subclasses for a coupling between fluid conducting pipes.