US PATENT SUBCLASS 277 / 448
.~.~.~ Material other than metal

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}
447  DF  .~.~ Floating piston ring {1}
448.~.~.~ Material other than metal

DEFINITION

Classification: 277/448

Material other than metal:

(under subclass 447) Floating piston ring consisting of a substance different from metal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

468, for a separate particular piston ring expander means

made out of a material other than metal.