US PATENT SUBCLASS 277 / 611
.~.~.~ Extrusion preventing (i.e., antiextrusion) or compression limiting feature

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}
602  DF  .~ Contact seal for a pipe, conduit, or cable {10}
608  DF  .~.~ Inserted between end-to-end pipe, conduit, or cable joint {6}
611.~.~.~ Extrusion preventing (i.e., antiextrusion) or compression limiting feature

DEFINITION

Classification: 277/611

Extrusion preventing (i.e., anti-extrusion) or compression limiting feature:

(under subclass 608) End-to-end joint including means deterring the seal from being squeezed out of its seated position or otherwise dislocated, or restricting seal compaction between the parts.

(1) Note. In this subclass the extrusion preventing (i.e., anti-extrusion) feature may work by limiting the compression of the seal or the compression limiting feature may prevent extrusion.

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.

593, for a static, contact seal for use between parts of an internal combustion engine having a compression limiting feature.

616+, for a static contact seal intended for use on a pipe, conduit or cable having an associated mounting or retaining means for the seal.

638, for a static, contact seal for other than an internal combustion engine, or a pipe, conduit or cable including a particular extrusion preventing (i.e., anti-extrusion) mounting or retaining means. 639, for a static seal for other than an internal combustion engine, or a pipe, conduit or cable including a compression limiting mounting or retaining feature.