US PATENT SUBCLASS 277 / 327
.~.~ Axially compressed ring

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}
327.~.~ Axially compressed ring

DEFINITION

Classification: 277/327

Axially compressed ring:

(under subclass 324) Overpressure control device wherein the seal has an annular shape and is concentric to the annular passage including means acting along an annular axial flow path formed by the annular passage axis to squeeze the seal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

328+, for a seal for above ground well apparatus actuated along its longitudinal axis.