US PATENT SUBCLASS 474 / 65
.~ With flexible belt-tracking guide helically coiled about pulley

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

64  DF  PLURAL TURNS OF SAME BELT ABOUT PULLEY AXIS {2}
65.~ With flexible belt-tracking guide helically coiled about pulley

DEFINITION

Classification: 474/65

With flexible belt-tracking guide helically coiled about pulley:

(under subclass 64) Subject matter and further including an auxiliary endless member capable of conforming to the curvature of a pulley* drive face, and being helically wound about the pulley axis and positioned between the belt* and pulley drive face to cause the belt turns to follow an intended path circumferentially about the pulley. [figure]