Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Speed responsive
Patent
1997-09-17
2000-11-21
Bucci, David A.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Speed responsive
474 46, 474 70, F16H 5900, F16H 5556, F16H 900
Patent
active
061495409
ABSTRACT:
A continuously variable transmission (CVT) system for use on snowmobiles, ATV's and similar vehicles. The CVT includes a rotatable drive clutch connected to an input shaft (the input shaft being connectable to an engine), and a roller clutch carried on the input shaft. The CVT also includes a rotatable driven clutch connected to an output shaft, the driven clutch having a laterally stationary sheave and a laterally movable sheave that is normally biased toward the stationary sheave. An endless flexible drive belt is disposed about the drive and driven clutches. The clutches and drive belt are configured so that when the engine is idling the belt firmly engages a drive surface of the roller clutch that is connected to the drive clutch. The roller clutch permits the drive surface (and, therefore, the belt) to remain stationary when the input shaft is rotating, thereby preventing vehicle "creep" when idling, and, yet, the roller clutch also firmly engages the drive clutch's drive surface with the input shaft when the driven clutch attempts to drive the belt faster than the speed at which the drive clutch and input shaft are rotating, thereby permitting the driven clutch to backdrive the input shaft and engine to provide engine braking to the vehicle.
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Aaen, Olav; "Clutch Tuning Handbook", 1986; revised 1989, 1993, 1995.
Watt, Duane; "Found, the Missing Half of the Secondary Clutch!"; SnowTech, Sep. 1997; pp. 114-119.
Anderson Joel H.
Barron Brent
Corneliusen Steven D.
Johnson Mitchell D.
Johnson Steven L.
Bucci David A.
Kaness Matthew A.
Polaris Industries Inc.
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