US PATENT SUBCLASS 277 / 472
.~.~.~ Annular expander nested in annular groove of the piston ring

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}
467  DF  .~.~ Particular piston ring expander {12}
472.~.~.~ Annular expander nested in annular groove of the piston ring {3}
473  DF  .~.~.~.~> Between piston rings
474  DF  .~.~.~.~> And contacting surfaces therebetween are complementary {1}
476  DF  .~.~.~.~> Inclined or beveled groove contacting expander having dissimilar contour

DEFINITION

Classification: 277/472

Annular expander nested in annular groove of the piston ring:

(under subclass 467) Particular piston ring expander wherein the piston ring expander is annular and intended to be at least partially received by the piston ring having an annular recess of any cross-sectional shape (e.g., tapered, etc.) that will partially receive the annular piston ring expander.