Abstract: A multiple-disk clutch has inner and outer clutch members, and a plurality of driving and driven friction disks. The driven and driving friction disks are arranged alternately. A first axially movable pressure member is biased to urge the driving and driven friction disks together in a compression direction. A first actuation system is connected to the first pressure member. The first actuation system is adapted release the compression force exerted by the first pressure member on the driving and driven friction disks. A second actuation system includes a second pressure member and is axially movable to compress the driving and driven friction disks together. The driving and driven friction disks are disposed between the first and second pressure members. The second actuation system is a centrifugal actuation system. The first actuation system is connected to and is axially movable with the second pressure member.

Abstract: A multiple-disk clutch has inner and outer clutch members, and a plurality of driving and driven friction disks. The driven and driving friction disks are arranged alternately. A first axially movable pressure member is biased to urge the driving and driven friction disks together in a compression direction. A first actuation system is connected to the first pressure member. The first actuation system is adapted release the compression force exerted by the first pressure member on the driving and driven friction disks. A second actuation system includes a second pressure member and is axially movable to compress the driving and driven friction disks together. The driving and driven friction disks are disposed between the first and second pressure members. The second actuation system is a centrifugal actuation system. The first actuation system is connected to and is axially movable with the second pressure member.

Abstract: An All-Terrain Vehicle (ATV) having a transmission assembly featuring an improved gear arrangement is disclosed. The transmission assembly includes a first gear having a central opening, the first is disposed such that the axis of the fork rod of the transmission passes through the central opening of the first gear.

Abstract: An all-terrain vehicle having an improved parking locking mechanism disposed within the housing of a transmission assembly. The parking locking mechanism includes a locking-lever guide disposed eccentrically about the axis of rotation of the shift drum and a locking lever having a body with an opening therein engaging the locking-lever guide. The guide and the opening constructed and arranged to cooperate with each other such that rotation of the shift drum moves the locking lever into locking engagement with one gear of the transmission.

Abstract: A transmission assembly for a vehicle, the transmission assembly having an energy storing mechanism linking its gear selector to the gear shifting mechanism and adapted to limit the force applied to the gear shifting mechanism through the gear selector.

Abstract: A multiple-disk clutch used in the power train of a motor vehicle for transmitting power from the crankshaft of an engine to a transmission input shaft is disclosed. The multiple-disk clutch comprises an actuation system supported at least in part by one of the inner and outer clutch member, and connected to a pressure member. The multiple-disk clutch is positioned within the multiple-disk clutch. The actuation system is adapted to overcome the biasing force of a spring or springs and release the compression force exerted by the pressure member on the driving and the driven friction disks such that the friction disks are spaced apart and power transmission through the multiple-disk clutch is interrupted.