US PATENT SUBCLASS 277 / 522
.~.~.~.~ Spring bias

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}
500  DF  .~ Circumferential contact seal for other than piston {13}
510  DF  .~.~ Contained or compressed by gland member in packing box {10}
520  DF  .~.~.~ Particular gland feature {5}
522.~.~.~.~ Spring bias {1}
523  DF  .~.~.~.~.~> Disposed about external bolt or stud

DEFINITION

Classification: 277/522

Spring bias:

(under subclass 520) Particular gland feature including an elastic contrivance or body to exert force on the gland.