A slide rail for damping a first side of a belt means of a belt drive includes an outer slide surface, an inner slide surface, an axial web, and a support-receiving element. The inner slide surface is oriented parallel to, and away from, the outer slide surface, and includes a rear side. The axial web has an axial extension disposed on the rear side. The support-receiving element is designed to orient the outer slide surface and the inner slide surface to damp the first side. In an example embodiment, the slide rail includes a transverse rib connecting the inner slide surface to the axial web.

A variable force tensioner (VFT) system that includes a primary piston split into two chambers disposed within a primary bore. The two chambers including a first low pressure chamber having a primary reservoir therein that feeds fluid through a check valve into a second high pressure chamber to control a biasing force on the primary piston. A piston bore clearance path can extend along a groove in the primary bore to feed oil back to the primary reservoir from the high pressure chamber.

The problem to be solved is to provide a tensioner lever that inhibits friction-induced wear or seizure on a surface of a pivoting support boss contacting a shoulder bolt so that high durability is achieved, and that is easily producible and enables cost reduction. As a solution to the problem noted above, the tensioner lever includes a shoe having a traveling surface, a lever body, and a pivotal support boss provided at a proximal end of the lever body to allow a distal end thereof to swing. The shoe and the lever body are integrally formed and assembled together by double injection molding. The lever body includes a slide bearing member, and a connecting part that connects the slide bearing member and the shoe. The slide bearing member, the connecting part, and the shoe are made of the same synthetic resin, and configured as a continuous one-piece component.

The problem to be solved is to provide a tensioner lever that inhibits friction-induced wear or seizure on a surface of a pivoting support boss contacting a shoulder bolt so that high durability is achieved, and that is easily producible and enables cost reduction. As a solution to the problem noted above, the tensioner lever includes a shoe having a traveling surface, a lever body, and a pivotal support boss provided at a proximal end of the lever body to allow a distal end thereof to swing. The shoe and the lever body are integrally formed and assembled together by double injection molding. The lever body includes a slide bearing member, and a connecting part that connects the slide bearing member and the shoe. The slide bearing member, the connecting part, and the shoe are made of the same synthetic resin, and configured as a continuous one-piece component.

A slide rail for a V-belt pulley drive includes an outer guide for guiding an outside of an axially extending V-belt, and an inner guide for guiding an inside of the V-belt. One of the guides includes a first guide part with a first hook and a contact face, and a second guide part with a first hook receiver and a support face. The first guide part and the second guide part are connectable via the first hook and retained by a clip-tooth connection, acting in an axial direction, between the contact face and the support face. A V-belt pulley drive is also disclosed. The V-belt pulley drive includes a first pulley sheave pair arranged on a first shaft, a second pulley sheave pair arranged on a second shaft, an axially extending V-belt for transmitting torque between the pulley sheave pairs, and the slide rail arranged to guide the V-belt.

A toothed-belt drive, includes a toothed belt, at least one driving element attached to the toothed belt, and a toothed disk with tooth recesses for driving teeth of the toothed belt and driving element recesses for driving the at least one driving element. The driving element forms a connecting element that can be connected to an element to be driven.

A chain guide for a bicycle having may include a base frame and a height adjustment member connected to the base frame and slidable relative to the base frame and lockable in a first position by engaging a first locking member. A retaining member may be pivotally connected to the height adjustment member and may be pivotable about a pivot axis a retaining position, in which the retaining member is positioned to obstruct lateral movement of the chain away from the chainring thereby preventing lateral misalignment between the chain and the chainring, and a removal position, in which the retaining member does not obstruct lateral movement of the chain away from the base frame while the height adjustment member is locked in the first position. The pivot axis may be spaced apart from the first locking member.

A torsional spring tensioning system for a power transmission chain is disclosed. In embodiments, the torsional spring tensioning system includes at least one torsion spring coupled to a pair of links (e.g., an inner link and an outer link) of the power transmission chain. The torsional spring includes a first spring leg and a second spring leg flexibly coupled by at least one winding. The winding is coupled to a pivot that connects the inner and outer links together. Meanwhile, the first spring leg is coupled to the inner link, and the second spring leg is coupled to the outer link. As a result of this configuration, the torsional spring biases the inner link toward the outer link, or vice versa, to produce/maintain tension in the power transmission chain.

A chain damper for use with a bicycle may include a base having an attachment region that is configured to be attached to a bicycle and a chain receiving portion extending from the base in a first direction. The chain receiving portion can include a chain damping surface that includes a resiliently deformable damping material and at least partially bounds a chain receiving aperture. The chain receiving aperture may extend in an axial direction and may be configured so that when the chain damper is attached to the bicycle the axial direction is substantially aligned with the primary chain direction and the chain damping surface is spaced apart from the chain travel path.

A chain damper for use with a bicycle may include a base having an attachment region that is configured to be attached to a bicycle and a chain receiving portion extending from the base in a first direction. The chain receiving portion can include a chain damping surface that includes a resiliently deformable damping material and at least partially bounds a chain receiving aperture. The chain receiving aperture may extend in an axial direction and may be configured so that when the chain damper is attached to the bicycle the axial direction is substantially aligned with the primary chain direction and the chain damping surface is spaced apart from the chain travel path.