US PATENT SUBCLASS 277 / 485
.~.~.~ Undulating periphery providing axially extending face against inner perimeter of the piston ring


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}
467  DF  .~.~ Particular piston ring expander {12}
485.~.~.~ Undulating periphery providing axially extending face against inner perimeter of the piston ring


DEFINITION

Classification: 277/485

Undulating periphery providing axially extending face against inner perimeter of the piston ring:

(under subclass 467) Particular piston ring expander wherein the piston ring expander provides a circumferential, radial facing, wavy, or corrugated structure against an opposing inside circumference of the piston ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

477+, for a particular piston ring expander, having a slotted or undulating circular band, having an inclined or axially facing seat for the piston ring.