A leaf chain includes a plurality of chain units each having two pins, around which first and second alternate inner plates between outer plates are mounted. The plates form respective apertures where the pins penetrate. Each chain unit has bushings located in the apertures of the first and second inner plates, and first washers disposed between any two adjacent bushings and between the bushings and the outer plates. There are connecting plates located at an outer side of the outer plates and tightly engaged with the pins to prevent the outer plates from being deformed because of a concentration of large force in the outer plates during the transmission. The outer plates have a loose engagement with the pins to prevent the pins and inner plates from being worn away. The first washers help the sealing effect to maintain the preferable stability and transmissibility and prolong the operating life.

The application describes and illustrates a timing belt, particularly a toothed belt, having a first end, a second end, a rear side, a front side, and having a plurality of teeth arranged on the rear side and/or the front side, wherein the first end has at least one cutaway, wherein the second end has at least one tine that is insertable into the cutaway, and wherein the first end and the second end are detachably connectable to each other and the teeth of the first end have an offset relative to the teeth of the second end in the connected condition under no tension.

Problem. To provide a chain pin which makes it possible to improve wear resistance even in an environment in which degraded oil is used. Solution. A large number of pins are mixed/agitated together with a particle mixture including a penetrant comprising chromium (Cr) powder and tungsten carbide (WC) powder, and an iron chloride (FeCl.sub.3) catalyst, and WC particles penetrate the surface of the pins together with chromium carbide (CrC). As a result, a chromium carbide layer in which WC particles are diffused in a CrC layer (CrCWC layer) is formed on the outermost surface part of the steel forming the parent material of the pins.

Problem. To provide a chain pin which makes it possible to improve wear resistance even in an environment in which degraded oil is used. Solution. A large number of pins are mixed/agitated together with a particle mixture including a penetrant comprising chromium (Cr) powder and tungsten carbide (WC) powder, and an iron chloride (FeCl.sub.3) catalyst, and WC particles penetrate the surface of the pins together with chromium carbide (CrC). As a result, a chromium carbide layer in which WC particles are diffused in a CrC layer (CrCWC layer) is formed on the outermost surface part of the steel forming the parent material of the pins.

A chain is provided in which an alloy coating layer suppressing iron reactions is formed on the surface and hence a paint film formed on the alloy coating layer has satisfactory adhesiveness, high strength, and high uniformity so that repair after assembling is not required and the chemical resistance is maintained satisfactorily.

A chain includes inner plates, bushes, outer plates, connecting pins, and rollers. Each constituent component includes: a zinc-aluminum-magnesium alloy coating layer formed on an iron-based basis material by impact plating; and a paint film formed on the zinc-aluminum-magnesium alloy coating layer, containing zinc and barium sulfate, and constructed such that at least one kind of resin selected from a group consisting of urethane resin, epoxy resin, and acrylic resin is hardened.

A chain is provided in which an alloy coating layer suppressing iron reactions is formed on the surface and hence a paint film formed on the alloy coating layer has satisfactory adhesiveness, high strength, and high uniformity so that repair after assembling is not required and the chemical resistance is maintained satisfactorily.

A chain includes inner plates, bushes, outer plates, connecting pins, and rollers. Each constituent component includes: a zinc-aluminum-magnesium alloy coating layer formed on an iron-based basis material by impact plating; and a paint film formed on the zinc-aluminum-magnesium alloy coating layer, containing zinc and barium sulfate, and constructed such that at least one kind of resin selected from a group consisting of urethane resin, epoxy resin, and acrylic resin is hardened.

A chain is provided in which a paint film has satisfactory adhesiveness and uniformity so that the satisfactory rust prevention property is maintained for a long period of time. A chain includes inner plates, bushes, outer plates, connecting pins, and rollers. Each constituent component includes: a zinc-aluminum-magnesium alloy coating layer formed on an iron-based basis material by impact plating; and a paint film formed on the zinc-aluminum-magnesium alloy coating layer by employing a water-based anti-corrosive paint which contains zinc, barium sulfate and colloidal silica.

A chain is provided in which a paint film has satisfactory adhesiveness and uniformity so that the satisfactory rust prevention property is maintained for a long period of time. A chain includes inner plates, bushes, outer plates, connecting pins, and rollers. Each constituent component includes: a zinc-aluminum-magnesium alloy coating layer formed on an iron-based basis material by impact plating; and a paint film formed on the zinc-aluminum-magnesium alloy coating layer by employing a water-based anti-corrosive paint which contains zinc, barium sulfate and colloidal silica.

A chain plate structure includes a link plate body and a sleeve. The link plate body has an acting surface being provided with a first approach edge, two combining portions, and a limiting block located adjacent to the first approach edge. The limiting block has an altitude higher than an altitude of the acting surface. The sleeve is mounted on the link plate body and has a through hole whose maximum diameter is greater than a maximum diameter of a raised ring peripherally formed on the corresponding one of the combining portions. Therefore, when two of the link plate bodies are combined together, a first space is formed between the acting surfaces of the two aligned link plate bodies. The limiting block serves to limit the first space, while the sleeve is allowed to move on one of the combining portions so as to provide a second space.

An object of the present invention is to provide a chain that employs simple structures so as to establish contact surface pressures in accordance with various conditions of use, for the purpose of reducing frictional loss and preventing wear or damage to a chain guide member, as well as reducing order-related noise. The chain 100 is formed by inner links 101 and outer links 102 alternately and pivotably coupled together in a longitudinal direction of the chain. The plurality of inner plates 110 include an asymmetrical inner plate 110x having different edge shapes on upper and lower sides in a height direction of the chain.