US PATENT SUBCLASS 277 / 432
.~.~.~ External device or system

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

345  DF  SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
409  DF  .~ Close proximity seal (e.g., contactless, fluent, etc.) {4}
431  DF  .~.~ Formed by pressurized sealing fluid introduced to form barrier {1}
432.~.~.~ External device or system

DEFINITION

Classification: 277/432

External device or system:

(under subclass 431) Pressurized sealing fluid including an enclosure for the joint or juncture and means outside the enclosure to introduce the pressurized sealing fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

513, for a dynamic, circumferential contact seal for other than a piston intended to be contained or compressed by a gland member in a packing box having means to introduce or direct a fluid having an external device or system.

930, for a seal for other than a dynamic close proximity pressurized sealing fluid barrier including an external device or system having a heating or cooling feature.