| 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} |
| 32 | DF | .~ Plural members forming plural belt-receiving grooves on common axis {2} |
| 35 | DF | .~.~ Axially spaced members simultaneously adjustable {1} |
| 36 | ![]() | .~.~.~ On bolt radially spaced from pulley axis |