US PATENT SUBCLASS 277 / 445
.~.~ Rotation limiting feature (i.e., antirotation)

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

DEFINITION

Classification: 277/445

Rotation limiting feature (i.e., anti-rotation):

(under subclass 434) Piston ring, expander, or seat including means to limit or prevent relative rotation between any combination of the piston ring, piston ring expander, or seat, or pluralities of the piston ring or piston ring expander.