US PATENT SUBCLASS 474 / 175
.~.~ Groove formed by rugate or circumferentially spaced drive surfaces

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

166  DF  FRICTION DRIVE PULLEY OR GUIDE ROLL {11}
174  DF  .~ Pulley or guide roll including circumferential belt-receiving groove {4}
175.~.~ Groove formed by rugate or circumferentially spaced drive surfaces

DEFINITION

Classification: 474/175

Groove formed by rugate or circumferen- tially spaced drive surfaces:

(under subclass 174) Subject matter wherein surfaces defining the belt*-receiving space are on separate components circumferentially spaced from each other, or wherein at least one of the surfaces defining the belt receiving spaces is roughened or includes alternating ridges and valleys to increase the extent of frictional grip on the belt. [figure]