US PATENT SUBCLASS 277 / 436
.~.~ Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.)

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}
434  DF  .~ Piston ring or piston ring expander or seat therefor {15}
436.~.~ Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.) {2}
437  DF  .~.~.~> Having particular mounting, retaining, or supporting feature
438  DF  .~.~.~> Having C, U, or V cross-sectional profile {1}

DEFINITION

Classification: 277/436

Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.):

(under subclass 434) Piston ring including a pliant or resilient extension having a tip for relative reciprocating contact against the enclosing wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309, for a process of dynamic sealing employing a peripheral, radially sealing, flexible projection (e.g., lip seal, piston cup, etc.).

549+, for a dynamic circumferential contact seal for other than a piston having a peripheral, radially sealing, flexible projection (e.g., lip seal, etc.).