A manufacturing method includes, cutting out a plurality of rings, polishing the rings, adjusting the plurality of rings so that they exhibit circumferential lengths respectively predetermined for them, nitriding the plurality of rings, and assembling in order to layer the plurality of rings into a multi-layered ring; wherein after the rings are cut out from the pipe, each of them is polished one by one so that their order is not changed; in nitriding, they are subjected to a nitriding process in a state where they are set in a jig in order to keep their order; and in assembling, the rings are assembled so that rings that were parts originally adjacent to each other in a state of the pipe become layers that are adjacent to each other in the multi-layered ring.

A manufacturing method includes, cutting out a plurality of rings, polishing the rings, adjusting the plurality of rings so that they exhibit circumferential lengths respectively predetermined for them, nitriding the plurality of rings, and assembling in order to layer the plurality of rings into a multi-layered ring; wherein after the rings are cut out from the pipe, each of them is polished one by one so that their order is not changed; in nitriding, they are subjected to a nitriding process in a state where they are set in a jig in order to keep their order; and in assembling, the rings are assembled so that rings that were parts originally adjacent to each other in a state of the pipe become layers that are adjacent to each other in the multi-layered ring.

A continuously variable transmission includes two pulleys (1, 2), each with two pulley discs (4, 5) that are mutually oriented at a pulley angle (p-i; p-o), and a drive belt (3) with an endless carrier (31) and with a number of transverse members (32) that each arrive in contact with the pulley discs (4, 5) via contact faces thereof that are mutually oriented at a belt angle (b). The pulley angle (p-i) of one (1) of the transmission pulleys (1, 2) is set smaller than the pulley angle (p-o) of the other one (2) of the transmission pulleys (1, 2) and the belt angle (b) is set essentially equal to the larger pulley angle (p-o) of the other one pulley (2). This transmission is capable of transmitting a particularly high driving power with a particularly high efficiency.

A continuously variable transmission includes two pulleys (1, 2), each with two pulley discs (4, 5) that are mutually oriented at a pulley angle (p-i; p-o), and a drive belt (3) with an endless carrier (31) and with a number of transverse members (32) that each arrive in contact with the pulley discs (4, 5) via contact faces thereof that are mutually oriented at a belt angle (b). The pulley angle (p-i) of one (1) of the transmission pulleys (1, 2) is set smaller than the pulley angle (p-o) of the other one (2) of the transmission pulleys (1, 2) and the belt angle (b) is set essentially equal to the larger pulley angle (p-o) of the other one pulley (2). This transmission is capable of transmitting a particularly high driving power with a particularly high efficiency.

A method for manufacturing an endless metal belt used in a belt-type continuously variable transmission, wherein a stress-relief heat treatment is performed after the circumference of a ring body has been adjusted, and aging/nitridation is performed after the stress-relief heat treatment.

A method for manufacturing an endless metal belt used in a belt-type continuously variable transmission, wherein a stress-relief heat treatment is performed after the circumference of a ring body has been adjusted, and aging/nitridation is performed after the stress-relief heat treatment.

A continuously variable transmission (CVT) includes a power transmission mechanism and at least one conical disk. The power transmission mechanism has a contact surface, and the power transmission mechanism includes a plurality of engaging elements. The plurality of engaging elements are retractably disposed on the contact surface. The disk surface of the conical disk has a plurality of engaging walls capable of engaging with the engaging elements. The continuously variable transmission is able to transmit power by way of engagement, such that the coupling between the power transmission mechanism and the conical disk is more stable. Thus, the continuously variable transmission is adaptable to high torsion application.

Disclosed is a method for operating a continuously variable transmission including two pulleys, each defining an effectively V-shaped circumference groove of variable width, a drive belt, wrapped around the pulleys, and a cooling system, which cooling system is provided with a controller for supplying a controlled amount of a cooling agent to the drive belt. The controller is arranged to supply at least a minimum amount of the cooling agent to the drive belt during operation of the transmission.

Disclosed is a method for operating a continuously variable transmission including two pulleys, each defining an effectively V-shaped circumference groove of variable width, a drive belt, wrapped around the pulleys, and a cooling system, which cooling system is provided with a controller for supplying a controlled amount of a cooling agent to the drive belt. The controller is arranged to supply at least a minimum amount of the cooling agent to the drive belt during operation of the transmission.

A link belt is provided wherein the link belt is formed of a plurality of links forming a series of links in successive overlapping relation. The link belt includes a first end having a first connector and a second end having a second connector so that the first connector is connected with the second connector to form a continuous loop of link belt. The link belt is formed by applying a lateral force against the assembled link belt while the link belt is under an axial tension to stretch the belt. After the step of stretching the belt, the first connector is connected with the second connector to form a continuous belt.