US PATENT SUBCLASS 277 / 310
.~ Piston ring for internal combustion engine

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

300  DF  PROCESS OF DYNAMIC SEALING {6}
310.~ Piston ring for internal combustion engine

DEFINITION

Classification: 277/310

Piston ring for internal combustion engine:

(under subclass 300) Process of dynamic sealing wherein the sealing means is an annulus for use on a part (i.e., a piston) that reciprocates along an axis of an enclosing wall of an internal combustion engine and the seal is for engaging the wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311, for a process of dynamic sealing employing a flexible ring.

434+, for a piston ring or piston ring expander or seat therefor.