Abstract: A method for stretching a continuous transmission chain having a number of adjacent links which are intercoupled in the longitudinal direction of the chain by pairs of longitudinal rocker elements by supporting the chain to be treated using at two rotatable cylindrical pulleys and selectively moving at least one of the pulleys away from the other pulley to generate in this chain tensile stresses of such magnitude that the limit of elasticity of the material of the links is at least locally surpassed.

Abstract: To obtain a compact structure and to increase at the same time the structural stiffness of an apparatus for plastically deforming and strengthening the links, which are intercoupled by rocker pins, of a complete endless transmission chain, said apparatus comprises a first and a second pair respectively of conical supporting surfaces for the ends which protrude outside said links of the rocker pins of a transmission chain, mounted thereon, said surfaces having a controllable mutual distance, the invention propose to add a third similar pair of supporting surfaces, provided for cooperation with the first and second shaft. This measure also speeds up the treatment of the transmission chain.

Abstract: The invention provides a device for stretching a transmission chain which is closed in itself and is made up from a number of adjacent links which are, in the longitudinal direction of the chain, mutually intercoupled by pairs of longitudinal rocker elements and in which the ends of at least one rocker element operate torque transmittingly with the pulley sheaves of a 5 pulley sheave transmission, said device comprising at least two supporting surfaces lying at a distance of each other and supporting the chain according to an arc, and provided with means to generate in this chain a tensile force leading to a surpassing of the limit of elasticity of the link material. To improve the stretching and more particularly to prevent an uncontrolled bending of 10 the rocker elements during the treatment of the chain with all drawbacks thereof the invention proposes that at least one of the supporting surfaces is configured to support the radial inner area of at least a part of the chain.

Abstract: Transmission chain constructed from a number of links intercoupled by pivot assemblies, each comprising a first and a second elongated pin of which at least one cooperates with its ends, while transmitting a force, with a pair of pulley sheaves, while during operation one pin rolls with a curved longitudinal surface over the opposite, essentially flat longitudinal surface of the second pin, both pins having mutually different cross-section configurations and a difference in the configuration of the transition between the rolling surface of the second pin to the upper and lower respectively longitudinal edge thereof and/or a mutual difference in height between the first and the second pin respectively.

Abstract: Transmission chain constructed from a number of links intercoupled by pivot assemblies, each comprising a first and a second elongated pin of which at least one cooperates with its ends, while transmitting a force, with a pair of pulley sheaves, while during operation one pin rolls with a curved longitudinal surface over the opposite, essentially flat longitudinal surface of the second pin, both pins having mutually different cross-section configurations and a difference in the configuration of the transition between the rolling surface of the second pin to the upper and lower respectively longitudinal edge thereof and/or a mutual difference in height between the first and the second pin respectively.