US PATENT SUBCLASS 277 / 326
.~.~ Rotatable

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

322  DF  SEAL FOR WELL APPARATUS {8}
324  DF  .~ For overpressure control device (e.g., seal for a blowout preventer, etc.) {3}
326.~.~ Rotatable

DEFINITION

Classification: 277/326

Rotatable:

(under subclass 324) Overpressure control device wherein the seal is part of an assembly fixed to the inner part (e.g., cable, drill stem, pipe, rod, rope, string, tubing, etc.) that rotates relative to the surrounding part (e.g., well casing, tubing head, etc.).