A belt drive system comprising a belt having a plurality of longitudinally spaced belt teeth, the belt further comprising a longitudinal groove extending in the endless direction of the belt through the belt teeth, a sprocket comprising a plurality of sprocket teeth on an outer circumference of the sprocket, each of the sprocket teeth extending parallel to the rotation axis, and each sprocket tooth configured to be received between adjacent belt teeth, and a first planar fin extending from at least one side of a sprocket tooth, the first planar fin configured to cooperatively engage the longitudinal groove, the first planar fin extending in a direction normal to a sprocket axis of rotation, the first planar fin having a width no greater than 20% of a sprocket groove width (W).

An isolating decoupler comprising a shaft, a pulley journalled to the shaft on at least one bearing, a one-way clutch engaged with the shaft, a torsion spring engaged between the one-way clutch and the pulley, the shaft comprises an inner race of the at least one bearing, and the torsion spring having an end welded to the one-way clutch and having another end welded to the pulley.

The invention provides a grease composition for lubricating resins which contains a base oil, a diurea compound represented by formula (I) as a thickener: R.sup.1NHCONHR.sup.2NHCONHR.sup.3 (I) (wherein R.sup.2 represents a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R.sup.1 and R.sup.3 each independently represent a straight-chain or branched alkyl group having 8 to 22 carbon atoms), and a chained hydrocarbon polymer having a weight-average molecular weight of 20,000 to 300,000.

A cycloidal gear pair reducer including an input shaft, mounted in a reducer casing such that it rotates about an axis referred to as main axis, an eccentric member carried by the input shaft and rotated by the latter, at least one cycloidal disc rotatably mounted on the eccentric member and having a cycloidal toothing, at least one ring gear provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and an output shaft; wherein the reducer comprises a suspension device arranged to return elastically the cycloidal toothing of the cycloidal disc and the receiving toothing of the ring gear towards one another such that the meshing backlash between the cycloidal disc and the ring gear is self-adjusted along at least one radial component relative to the main axis.

The present disclosure relates generally to the field of tissue removal and more particularly to methods and devices for use in medical applications involving selective tissue removal. One exemplary method includes the steps of providing a tissue cutting instrument capable of distinguishing between target tissue to be removed and non-target tissue, urging the instrument against the target tissue and the non-target tissue, and allowing the instrument to cut the target tissue while automatically avoiding cutting of non-target tissue. Various tools for carrying out this method are also described.

A primary clutch assembly for a continuously variable transmission is provided. The primary clutch assembly includes a fixed sheave and a movable sheave centered on a post for joint rotation therewith. A rotational unit disposed on the post generates centrifugal forces during rotation of the post that are translated axially to urge the movable sheave along the post towards the fixed sheave. The primary clutch utilizes an actuator assembly that is configured to establish a locked condition that prevents axial movement of the movable sheave as the rotational unit builds-up centrifugal force and an unlocked condition to allow sudden axial movement of the movable sheave towards the fixed sheave. The actuator assembly includes a bearing unit that extends through a hole in the post to contact the movable sheave in the locked condition and is housed within the hole and spaced from the movable sheave in the unlocked condition.

A pulley device provides a pulley and a bearing. The pulley has at least one C-shaped pulley part having an inner portion mounted on the bearing, an outer portion having an outer cylindrical surface dedicated to interact with a belt or a chain, and an intermediate portion extending substantially radially between axial ends of inner and outer portions on one axial side of pulley device. The outer cylindrical surface of outer ring is provided with at least one material deformation forming an axial stop for the pulley.

An isolating decoupler comprising a shaft, a pulley journalled to the shaft on at least one bearing, a one-way clutch engaged with the shaft, a torsion spring engaged between the one-way clutch and the pulley, the shaft comprises an inner race of the at least one bearing, and the torsion spring having an end welded to the one-way clutch and having another end welded to the pulley.

Torsional vibration dampers are disclosed that have a hub defining a plurality of fastener-receiving openings and an inertia member concentric about and spaced a radial distance apart from a shaft-receiving member of the hub and having a plurality of receptacles defining a bore oriented axially. Each receptacle aligns with one of the plurality of fastener-receiving openings, and receives one of a plurality of elastomeric rings with a fastener seated therein and received in the fastener-receiving openings to operatively connect the inertia member to the hub through compression of the elastomeric rings. The height of each elastomeric ring is greater than the axial width of the receptacles, and compression of the elastomeric rings deforms each radially into a first gap between the hub and the inertia member and a second gap between the inertia member and the fastener, thereby axially locking the inertia member to the hub for rotation together.

A rebuild kit for a spider assembly of a CVT clutch is provided. The rebuild kit includes two non-rotating washers, a roller for each location on a spider. The spider may have wear that is over an acceptable amount of wear determined by the manufacturer. The rebuild kit further includes a pin that couples the two non-rotating washers and the roller between the non-rotating washers within the spider. The roller is engaged by a flyweight of the CVT clutch and the non-rotating washers prevent additional wear of the spider while maintaining the roller aligned with the flyweight during operation of the CVT clutch. The rebuild kit may also include an insert within an aperture of the roller, wherein the insert has high temperature resistance, a low coefficient of friction and non-adhesive properties.