US PATENT SUBCLASS 474 / 9
.~ Members are gripping jaws actuated during each rotation of pulley

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

8  DF  PULLEY WITH BELT-RECEIVING GROOVE FORMED BY DRIVE FACES ON RELATIVELY AXIALLY MOVABLE COAXIAL CONFRONTING MEMBERS (E.G., EXPANSIBLE CONE PULLEY, ETC.) {13}
9.~ Members are gripping jaws actuated during each rotation of pulley {1}
10  DF  .~.~> Via relatively rotating cam and follower

DEFINITION

Classification: 474/9

Members are gripping jaws actuated during each rotation of pulley:

(under subclass 8) Subject matter wherein during each full revolution of the pulley* there is a first period of time when opposed belt*-engaging surfaces are in driving engagement with the belt, and a second period of time when opposed belt-engaging surfaces are out of driving engagement with the belt, and wherein the components are mounted for relative cyclical movement accomplished by interaction with the belt or by an auxiliary device, whereby during the second period of time the belt-engaging surfaces are separated to facilitate exit and entrance of the belt from and to the space between the surfaces, and whereby the belt engaging surfaces have relative movement to a position toward each other during the first period of time to increase the

engagement force of the surfaces with the belt. [figure]