US PATENT SUBCLASS 16 / 275
.~.~ Ball or roller bearing


Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

221  DF  HINGE {32}
273  DF  .~ Having means to reduce friction between hinge parts {2}
275.~.~ Ball or roller bearing {1}
276  DF  .~.~.~> Circularly distributed balls or rollers


DEFINITION

Classification: 16/275

Ball or roller bearing:

(under subclass 273) Hinge wherein the surface friction between the two opposing surfaces is reduced by interposing a plurality of rolling elements between the surfaces, whereby rolling rather than sliding contact occurs.

(1) Note. A rolling cam follower is not considered to be a bearing as defined above.

SEE OR SEARCH THIS CLASS, SUBCLASS:

224, for a ball and socket hinge.

313+, for a gravitating hinge having roller which rides along a camming surface as the hinged members* swing relative to one another.