US PATENT SUBCLASS 277 / 417
.~.~.~.~ Formed by multiple washers

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}
411  DF  .~.~ Gap or clearance {2}
412  DF  .~.~.~ Labyrinth {7}
417.~.~.~.~ Formed by multiple washers

DEFINITION

Classification: 277/417

Formed by multiple washers:

(under subclass 412) Labyrinth wherein the labyrinth is a plurality of substantially flat rings aligned to provide the throttling zones.