US PATENT SUBCLASS 277 / 638
.~.~.~ Extrusion preventing (i.e., antiextrusion) structure

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

590  DF  SEAL BETWEEN FIXED PARTS OR STATIC CONTACT AGAINST RELATIVELY MOVABLE PARTS {3}
628  DF  .~ Contact seal for other than internal combustion engine, or pipe, conduit, or cable {9}
637  DF  .~.~ Having particular associated mounting or retaining feature {4}
638.~.~.~ Extrusion preventing (i.e., antiextrusion) structure

DEFINITION

Classification: 277/638

Extrusion preventing (i.e., anti-extrusion) structure:

(under subclass 637) Mounting or retaining feature including means deterring the seal from being squeezed out of its seated position or otherwise dislocated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324+, for a seal for well apparatus having an overpressure control device that may include extrusion preventing (i.e., anti-extrusion) structure.

584, for a dynamic, circumferential contact seal for other than a piston having an extrusion preventing (i.e., anti-extrusion) structure.

611, for a static contact seal intended for insertion between an end-to-end pipe, conduit, or cable joint having an extrusion preventing (i.e., anti-extrusion) or compression limiting feature.

619+, for a static, contact seal intended for use on a pipe, conduit or cable including an axially related backing ring to mount or retain the seal.