Provided is a chain power transmission mechanism and a silent chain each having a simple configuration, easy to manufacture, and capable of reducing noise in the entire chain power transmission mechanism. Link plates of the silent chain include an inner-flank-engagement link plate which engages with a sprocket in an inner flank engagement mode and an outer-flank-engagement link plate which engages with the sprocket in an outer flank engagement mode. The inner-flank-engagement link plate and the outer-flank-engagement link plate are arranged such that combinations of the link plates at positions where engagement with and disengagement from a plurality of the sprockets are synchronized include a combination in which at least one of the link plates is different in engagement mode from another link plate.

An extended-life tire chain and method of extending the life of a tire chain. An extended-life tire chain has a plurality of chain links, a plurality of twin clevises each secured to two of the links, and a plurality of clevis pins each having a head on one of its extremities. Each twin clevis has two receptacles. Each clevis pin is removably disposed in a different one of the receptacles. The twin clevises are oriented such that, when the tire chain is installed on a tire, the heads project radially away from a tread surface of the tire.

Disclosed is a chain element (2), in particular for a power transmission chain of a chain drive, made of a carbon-containing material, especially steel, characterized by a core layer (5) that has a ferritic matrix structure including at least one hard phase that is distributed therein, and a hardened peripheral layer (6) that has a martensitic structure.

Disclosed is a chain element (2), in particular for a power transmission chain of a chain drive, made of a carbon-containing material, especially steel, characterized by a core layer (5) that has a ferritic matrix structure including at least one hard phase that is distributed therein, and a hardened peripheral layer (6) that has a martensitic structure.

A power transmission drive member adapted to mesh with a drive sprocket to transmit rotary motion, the drive member comprising a plurality of engaging mechanisms, each comprising an engaging body comprising an engagement pocket adapted to engage with the drive sprocket, each of which engagement pockets comprising a first engaging surface and a second engaging surface spaced apart from the first engaging surface, the first and second engaging surfaces forming an engaging surface pair, which pair is rotatable about an engaging mechanism rotational axis, wherein the power transmission drive member comprises a carrier, which carrier is articulated and is adapted to support the plurality of engaging mechanisms.

A power transmission drive member adapted to mesh with a drive sprocket to transmit rotary motion, the drive member comprising a plurality of engaging mechanisms, each comprising an engaging body comprising an engagement pocket adapted to engage with the drive sprocket, each of which engagement pockets comprising a first engaging surface and a second engaging surface spaced apart from the first engaging surface, the first and second engaging surfaces forming an engaging surface pair, which pair is rotatable about an engaging mechanism rotational axis, wherein the power transmission drive member comprises a carrier, which carrier is articulated and is adapted to support the plurality of engaging mechanisms.

The silent drive chain system for a motorcycle rear drive includes a small chain wheel, a large chain wheel and a silent drive chain, where the silent drive chain is a toothed chain and includes: an outer chain plate, inner chain plates, a guide plate, a pin, a sleeve and a damping sealing ring; the sleeve is in interference fit with mounting holes of both the inner chain plate and the guide plate and forms an inner chain link together with the inner chain plate and the guide plate, the pin penetrates into the sleeve and is in clearance fit with the sleeve, two ends of the pin are in interference fit with a mounting hole of the outer chain plate, and form an outer chain link together with the outer chain plate, and the damping sealing ring is arranged between the outer chain link and the inner chain link.

The silent drive chain system for a motorcycle rear drive includes a small chain wheel, a large chain wheel and a silent drive chain, where the silent drive chain is a toothed chain and includes: an outer chain plate, inner chain plates, a guide plate, a pin, a sleeve and a damping sealing ring; the sleeve is in interference fit with mounting holes of both the inner chain plate and the guide plate and forms an inner chain link together with the inner chain plate and the guide plate, the pin penetrates into the sleeve and is in clearance fit with the sleeve, two ends of the pin are in interference fit with a mounting hole of the outer chain plate, and form an outer chain link together with the outer chain plate, and the damping sealing ring is arranged between the outer chain link and the inner chain link.

A chain containing links in which at least some of the inner links have links multi-radiused backs which include a small center radius with adjacent larger radiused backs on either side of the center radius. The center radius is present along the back of the link opposite the crotch of the link.

A chain containing links in which at least some of the inner links have links multi-radiused backs which include a small center radius with adjacent larger radiused backs on either side of the center radius. The center radius is present along the back of the link opposite the crotch of the link.