Abstract: Toothed belt drive with a toothed belt and at least two toothed pulleys, wherein the toothed belt has at least one drive side provided with a toothed profile, the toothed belt wraps around the toothed pulleys over a partial area of their circumference and the teeth of the toothed belt meshingly engage in the tooth gaps of the toothed pulleys, wherein at least one of the toothings on the belt or pulley is formed as a series of tooth pitches varying along the circumference, wherein the individual tooth pitches are designed to vary by up to a maximum of 5% relative to the mean tooth pitch on the belt or pulley, and the absolute deviation of a varied tooth pitch from the mean tooth pitch on the belt or pulley is limited by the backlash of the toothing, wherein the backlash ES results from the difference of the width eS of the tooth gaps of the respective toothed pulley and the width eR of the teeth of the toothed belt in the middle of the tooth height of the teeth of the toothed belt.

Abstract: The present invention relates to elastomer toothed belts comprising a fabric spanning the teeth of the toothed belt, wherein the elastomer mixture forming the teeth contains a crosslinked ethylene-propylene rubber (EPM) and/or a crosslinked ethylene-propylene terpolymer rubber (EPDM) accounting for at least 70% by weight of the elastomer mixture based on the polymer proportion and wherein an interlayer is arranged between the fabric and the elastomer mixture forming the teeth which contains at least 70% by weight of hydrogenated acrylonitrile-butadiene rubber (HNBR) based on the polymer proportion of the interlayer. Such elastomer toothed belts are halogen-free and feature improved durability and good low-temperature stability properties.

Abstract: A band or belt designed as an elongate bearing, traction or drive element running around rollers or pulleys and made of an elastomer material, and preferably provided with embedded reinforcing elements or tension members extending in the longitudinal direction of the band or belt, having the following features: the band or the belt has one or more elongate tubular receptacles embedded in the elastomer material, in the cavity of which electronic components are arranged, preferably sensors, signal processing or control devices and/or transmission devices, the tubular receptacles are embedded in the elastomer material in such a way that their longitudinal axis or the direction of their greatest extent is oriented substantially transversely to the main bending direction of the band or belt.

Abstract: The invention relates to a method for producing a belt- or band-shaped component made of elastomer material, which is driven to run around under tensile stress and which has an electronic circuit or electronic device installed in the component, the component having tension members or cords which are arranged in the longitudinal direction, wherein, during the fabrication and before the vulcanization of the component blank, planar intermediate plies or strips made of material which cannot be crosslinked by vulcanization are inserted into the blank structure in subregions of the blank, wherein, after the fabrication, the blank is completely vulcanized to form the component and, where appropriate, cut or trimmed, and wherein the intermediate plies or strips are then removed from the component through correspondingly incorporated or method-intrinsically formed openings, and an electronic circuit or electronic device is introduced into the thus resulting planar empty space or interspace in the component.

Abstract: V-belt from an elastomeric material, composed of an in each case annular V-belt substructure and V-belt back that are connected to one another and are produced as a V-belt composite from two individually tailored and conjointly vulcanized part-blanks, specifically a first part-blank that is configured as a V-belt substructure and includes the belt profile, and a second part-blank that is configured as a wound V-belt back, wherein the V-belt has one or a plurality of tiers of reinforcing support cords and on the belt back and/or on the profile side of said V-belt has a woven fabric, wherein the reinforcing support cords are radially disposed so as to be in a circumferential plane in the V-belt back and so as to be outside the V-belt substructure.

Abstract: A band or belt designed as an elongate bearing, traction or drive element running around rollers or pulleys and made of an elastomer material, and preferably provided with embedded reinforcing elements or tension members extending in the longitudinal direction of the band or belt, having the following features: the band or the belt has one or more elongate tubular receptacles embedded in the elastomer material, in the cavity of which electronic components are arranged, preferably sensors, signal processing or control devices and/or transmission devices, the tubular receptacles are embedded in the elastomer material in such a way that their longitudinal axis or the direction of their greatest extent is oriented substantially transversely to the main bending direction of the band or belt.

Abstract: Toothed belt drive having one toothed belt and at least two, preferably helically geared, toothed pulleys, wherein the toothed belt wraps the toothed pulleys over a part-region of the circumference of the latter and the teeth of the toothed belt mesh in the tooth gaps of the toothed pulleys, wherein the air gap ES or ES(mk) that relates to the nominal pitch P and results from the difference between the width es of the tooth gaps of the respective toothed pulley and the width eR of the teeth of the toothed belt is configured at the mean height of the teeth, depending on the tooth count zR of the toothed pulleys and on the tooth count z of the toothed pulleys, or on the tooth counts zk of the smaller toothed pulley and on zg of the larger toothed pulley, respectively.

Abstract: The invention relates to a method for producing a belt- or band-shaped component made of elastomer material, which is driven to run around under tensile stress and which has an electronic circuit or electronic device installed in the component, the component having tension members or cords which are arranged in the longitudinal direction, wherein, during the fabrication and before the vulcanization of the component blank, planar intermediate plies or strips made of material which cannot be crosslinked by vulcanization are inserted into the blank structure in subregions of the blank, wherein, after the fabrication, the blank is completely vulcanized to form the component and, where appropriate, cut or trimmed, and wherein the intermediate plies or strips are then removed from the component through correspondingly incorporated or method-intrinsically formed openings, and an electronic circuit or electronic device is introduced into the thus resulting planar empty space or interspace in the component.

Abstract: V-belt from an elastomeric material, composed of an in each case annular V-belt substructure and V-belt back that are connected to one another and are produced as a V-belt composite from two individually tailored and conjointly vulcanized part-blanks, specifically a first part-blank that is configured as a V-belt substructure and includes the belt profile, and a second part-blank that is configured as a wound V-belt back, wherein the V-belt has one or a plurality of tiers of reinforcing support cords and on the belt back and/or on the profile side of said V-belt has a woven fabric, wherein the reinforcing support cords are radially disposed so as to be in a circumferential plane in the V-belt back and so as to be outside the V-belt substructure.

Abstract: Toothed belt drive having one toothed belt and at least two, preferably helically geared, toothed pulleys, wherein the toothed belt wraps the toothed pulleys over a part-region of the circumference of the latter and the teeth of the toothed belt mesh in the tooth gaps of the toothed pulleys, wherein the air gap ES or ES(mk) that relates to the nominal pitch P and results from the difference between the width es of the tooth gaps of the respective toothed pulley and the width eR of the teeth of the toothed belt is configured at the mean height of the teeth, depending on the tooth count zR of the toothed pulleys and on the tooth count z of the toothed pulleys, or on the tooth counts zk of the smaller toothed pulley and on zg of the larger toothed pulley, respectively.

Abstract: A cylinder liner for being mounted to a cylinder head of an internal combustion engine includes an inner liner face for guiding a piston of the internal combustion engine, an outer liner face, and a liner end face facing the cylinder head in a mounted state and connecting the inner liner face and the outer liner face. The inner liner face extends along a cylinder axis of the cylinder liner. The liner end face includes a sealing groove for holding a joint ring and a step-like structure formed in a liner wall of the cylinder liner. The step-like structure includes in series a first radially extending liner face, a first axially extending liner face, a second radially extending liner face, a second axially extending liner face, a third radially extending liner face, and a transition liner face.

Abstract: A drive belt with a main body made of a polymeric material having resilient properties, comprising a top layer as the belt rear face and a base having a force transfer zone, wherein moreover at least one tension cord is embedded in the main body. Three drive belt variants are specified. In addition, the top layer and/or the force transfer zone are/is provided with a pressure-resistant coating. The drive belt is characterized in that at least the top layer and/or the base are/is free from carbon black and free from polycyclic aromatic hydrocarbons (PAH). The tension cord and/or abrasion-resistant coating are/is preferably prepared with an adhesive system that is likewise free from carbon black and PAH.

Abstract: A hybrid V-belt (4) has at least one tension carrier (2) and a plurality of blocks (6). The blocks function as support elements and are mounted on the tension carrier. The at least one tension carrier (2) comprises elastomeric material and is reinforced with a cord insert (12). The surfaces of the tension carrier (2) are transversely ribbed or undulated and are provided with cover layers (14, 16). To increase the fatigue strength of such hybrid V-belts, the cord insert (12) is, according to the invention, arranged directly on the lower radially inner cover (14). A direct contact between the cord ply (12) and the radially inner cover layer (14) results in the region of the zeniths (6a, . . . ) of the lower block slot flanks.

Abstract: In a low-vibration V-belt (2), consisting of at least one load carrier (4; 4a, 4b) and a plurality of support elements (6) located thereon, the damping effect is improved. The formation of the damping elements (34) in a radial direction above the central section and in the direction of the width of the belt substantially symmetrical to the axis of symmetry of the support element (6) allows both possible transversal vibrations to be simultaneously damped. The damping elements (34), which consist preferably of elastomer and have high inherent damping properties, can be seated in recesses or bores (36) of the support elements (6). The rear faces of the support elements (6) can have cylindrical counterforms (38), which correspond in shape and position to the convex damping elements (34) located on the respective front faces. The edges of the convex parts (34) have radii or chamfers which permit the corresponding counterparts (34, 38) to engage without force or impact.

Abstract: In a low-vibration V-belt (2), consisting of at least one load carrier (4; 4a, 4b) and a plurality of support elements (6) located thereon, the damping effect is improved. The formation of the damping elements (34) in a radial direction above the central section and in the direction of the width of the belt substantially symmetrical to the axis of symmetry of the support element (6) allows both possible transversal vibrations to be simultaneously damped. The damping elements (34), which consist preferably of elastomer and have high inherent damping properties, can be seated in recesses or bores (36) of the support elements (6). The rear faces of the support elements (6) can have cylindrical counterforms (38), which correspond in shape and position to the convex damping elements (34) located on the respective front faces. The edges of the convex parts (34) have radii or chamfers which permit the corresponding counterparts (34, 38) to engage without force or impact.

Abstract: A V-belt transmits rotational movements between at least two belt pulleys and includes at least one endless load carrier and a plurality of transverse blocks mounted thereon. The load carrier is fitted into slots which extend from at least one inclined lateral surface of a block toward the center region thereof. The load carrier has a contact surface which faces a boundary surface of the slot in the block. The contact surface and the boundary surface are provided with convex and/or concave sections. To minimize losses and increase efficiency, the pressing force is reduced where the slide movement occurs. A contact region is assumed between the stretched state of the V-belt up to the state corresponding to the smallest running radius. In the entire contact region, a continuously changeable curvature or a composite of at least three sections of constant curvature is realized in such a manner that the curvature from the center of the contact region to the outer region increases.

Abstract: A V-belt transmits rotational movements between at least two belt pulleys and includes at least one endless load carrier and a plurality of transverse blocks mounted thereon. The load carrier is fitted into slots which extend from at least one inclined lateral surface of a block toward the center region thereof. The load carrier has a contact surface which faces a boundary surface of the slot in the block. The contact surface and the boundary surface are provided with convex and/or concave sections. To minimize losses and increase efficiency, the pressing force is reduced where the slide movement occurs. A contact region is assumed between the stretched state of the V-belt up to the state corresponding to the smallest running radius. In the entire contact region, a continuously changeable curvature or a composite of at least three sections of constant curvature is realized in such a manner that the curvature from the center of the contact region to the outer region increases.