US PATENT SUBCLASS 277 / 439
.~.~.~.~ Axially facing cup

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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  DF  .~.~ Piston ring having peripheral radially sealing flexible projection (e.g., piston cup, etc.) {2}
438  DF  .~.~.~ Having C, U, or V cross-sectional profile {1}
439.~.~.~.~ Axially facing cup

DEFINITION

Classification: 277/439

Axially facing cup:

(under subclass 438) C, U, or V cross-sectional profile wherein the C-, U-, or V-shape or form is radially extending to the reciprocating axis of the piston.

SEE OR SEARCH THIS CLASS, SUBCLASS:

335, for a seal for well apparatus having an axially facing cup shape.