US PATENT SUBCLASS 277 / 431
.~.~ Formed by pressurized sealing fluid introduced to form barrier

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.~.~ Formed by pressurized sealing fluid introduced to form barrier {1}
432  DF  .~.~.~> External device or system

DEFINITION

Classification: 277/431

Formed by pressurized sealing fluid introduced to form barrier:

(under subclass 409) Close proximity seal wherein the joint or juncture has sealing fluid introduced into at a pressure equal to or greater than the pressure of the sealed fluid to oppose the flow of the sealed fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

408, for a relatively rotatable, radially extending, sealing face member (e.g., face, mechanical, etc.) including means to introduce, circulate, or remove fluid.

512+, 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.

926, for a seal for other than a dynamic close proximity seal (e.g., contactless, fluent, etc.) created by pressurized sealing fluid introduced to form a barrier having means to create a fluid pressure equilibrium at a joint or juncture.

927, for a seal for other than a dynamic close proximity seal (e.g., contactless, fluent, etc.) created by pressurized sealing fluid introduced to form a barrier having means to create a fluid pressure different from the sealed fluid pressure.

SEE OR SEARCH CLASS 384, Bearings, for more than nominal bearing structure or detail (e.g., liner, bearing race, cage, etc.) combined with a specific seal,

132+, for a plain, radial bearing where the seal is a barrier of liquid or gas or subclass 478 for a radial antifriction bearing where centrifugal force loads the seal or a liquid or gas forms a sealing barrier.