US PATENT SUBCLASS 384 / 555
.~.~.~.~.~.~ Mating grooves and projections

Current as of: June, 1999
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384 /   HD   BEARINGS

91  DF  ROTARY BEARING {8}
445  DF  .~ Antifriction bearing {9}
456  DF  .~.~ Radial bearing {9}
548  DF  .~.~.~ Roller bearing {16}
551  DF  .~.~.~.~ Discrete circumferential or axial spacer {2}
553  DF  .~.~.~.~.~ Spaced by rollers {2}
555.~.~.~.~.~.~ Mating grooves and projections

DEFINITION

Classification: 384/555

Mating grooves and projections:

(under subclass 553) Subject matter wherein annular grooves or projections on the load-bearing roller skate with annular projections or grooves on the nonload-bearing spacing rollers.