US PATENT SUBCLASS 277 / 465
.~.~.~ Circumferentially spaced slots, pockets, grooves, channels, recesses, or bevels

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}
465.~.~.~ Circumferentially spaced slots, pockets, grooves, channels, recesses, or bevels

DEFINITION

Classification: 277/465

Circumferentially spaced slots, pockets, grooves, channels, recesses, or bevels:

(under subclass 459) Piston ring wherein the piston ring has annularly spaced pockets, grooves, channels, recesses, or bevels.