US PATENT SUBCLASS 474 / 251
.~.~.~ And additional groove on opposite surface

Current as of: June, 1999
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474 /   HD   ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS

237  DF  FRICTION DRIVE BELT {14}
249  DF  .~ Including groove, openings or pockets formed in belt surface and arranged along entire length of belt (e.g., for flexibility, air escape, etc.) {2}
250  DF  .~.~ Grooves transversely extending on belt surface {1}
251.~.~.~ And additional groove on opposite surface

DEFINITION

Classification: 474/251

And additional groove on opposite surface:

(under subclass 250) Subject matter wherein a face on said component opposite from said one face also has a groove or grooves formed therein. [figure]