US PATENT SUBCLASS 277 / 446
.~.~.~ Between rings

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}
445  DF  .~.~ Rotation limiting feature (i.e., antirotation) {1}
446.~.~.~ Between rings

DEFINITION

Classification: 277/446

Between rings:

(under subclass 445) Piston ring or piston ring expander wherein the feature to limit rotation (i.e., antirotation) is between any combination of the piston ring or piston ring expander, or between any combination of more than one piston ring or piston ring expander.

SEE OR SEARCH THIS CLASS, SUBCLASS:

490, for a piston ring having sectional structure including a component ring of eccentric or variable thickness.