US PATENT SUBCLASS 277 / 461
.~.~.~.~ Axially spaced

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}
459  DF  .~.~ Piston ring including exposed port, slot, pocket, groove, channel, recess, or bevel {3}
460  DF  .~.~.~ Circumferential groove, channel, recess, or bevel {2}
461.~.~.~.~ Axially spaced {1}
462  DF  .~.~.~.~.~> Ports

DEFINITION

Classification: 277/461

Axially spaced:

(under subclass 460) Piston ring wherein the annular groove, channel, recess or bevel has another annular groove, channel, recess, or bevel spaced axially from it.