Abstract: An engine having an engine case on one side of which a V-belt type of continuously variable transmission is provided, the CVT being placed in a transmission case and constituted that a V-belt is routed around a drive pulley and a driven pulley, the drive pulley being attached to one end of a crankshaft, the driven pulley being attached to one end of a transmission shaft parallel to the crankshaft, characterized in that the crankshaft is supported for free rotation with the engine case, one end of the crankshaft is projected in cantilever fashion from the engine case into the transmission case, the drive pulley is attached to the projected portion, and the transmission case is made as a component separate from or independent of the engine case and supported with the engine case so that a space is present between the engine case and the transmission case.

Abstract: A transverse element for a push belt for a continuously variable transmission comprises a supporting surface for supporting a carrier of the push belt, and a pulley sheave contact surface for contacting pulley sheaves of the continuously variable transmission. A curved transition surface is connected to the supporting surface, whereas a distance surface is located between this transition surface and the pulley sheave contact surface. The distance surface is positioned lower than the supporting surface. When the transverse element collides with a relatively large collision element like another transverse element, protrusions may be developed exclusively on the distance surface. These protrusions are not capable of inflicting damage on a carrier which is to be laid on the supporting surface, because these protrusions do not protrude beyond the level of the supporting surface.

Abstract: A belt for a continuously variable transmission (CVT) includes at least one continuous band supported against a contact face in a slot formed in each of a plurality of transverse elements of the CVT. The band has a surface positioned against the contact face. This surface is coated with chromium nitride by physical vapor deposition to reduce wear.

Abstract: A belt for a continuously variable transmission comprises endless plate-like rings 2 and a plurality of plate-like elements 3, which are placed adjacent to one another and slidably on the rings 2, so that the rings 2 are disposed on the saddle portions 34 of the elements 3, respectively. In each element 3, a first recess 42 is provided at the upper innermost part of each saddle portion 34 such that the first recess 42 is continuous to a corresponding lower side end of the neck portion 33. In addition, a second recess 43 is provided at the lower innermost part of each ear portion 35 such that the second recess 43 is continuous to a corresponding upper side end of the neck portion 33. At least one of the first and second recesses 42 and 43 is in an elliptic arc figure, in a compound arc figure that comprises various circular arcs or in a compound arc figure that comprises an elliptic arc and one or more circular arcs.

Abstract: An element for use in an annular metal belt (1) is disclosed. The annular metal belt (1) transmits torque between two pulleys each having a V-shaped groove. The element has a flank capable of making frictional contact with the V-shaped groove for transmission of torque. A plurality of threads are disposed on the flank substantially in parallel to one another. The threads has a slight height relative to a dimension of the flank, and the top section of each thread is substantially planar.

Abstract: A belt for a continuously variable transmission, and a continuously variable transmission including the same, includes a plurality of clips, each defining a space which defines a groove to which a ring is inserted, thereby reducing slip.

Abstract: A belt type continuously variable transmission includes a drive pulley having a fixed pulley half and a movable pulley half; a driven pulley having a fixed pulley half and a movable pulley half; and a metal belt. The metal belt includes a metal ring assembly having a plurality of endless metal rings laminated on one another and a plurality of metal elements supported on the metal ring assembly. The metal belt is wound around the drive pulley and the driven pulley. The movable pulley half of the drive pulley has a flexural stiffness higher than that of the fixed pulley half of the drive pulley, wherein it is difficult for the edges of the metal ring assembly to contact the metal elements and a V-face of the drive pulley.

Abstract: A hoop for a CVT belt including foreign matter existing in a nitrided hardened layer and surface of the hoop, the foreign matter comprises at least one of an oxide-type foreign matter, a nitride-type foreign matter, and a carbide-type foreign matter. The oxide-type foreign matter has a particle size of 25 ?m or less, the nitride-type foreign matter and/or the carbide-type foreign matter have particle sizes of 17 ?m or less.

Abstract: Driving belt provided with an enclosed tension element and metal transverse elements accommodated so as to be movable in a longitudinal direction along the tension element. The transverse elements each comprise a body part, a head part and a neck part therebetween. On either side of the neck part between the body part and the head part two axially oriented openings are present, for accommodating in each a part of the tension element. The body part includes side contact surfaces oriented substantially in an axial direction and diverging from each other in the radial direction, and with a substantially axially oriented tilting line and in which an upper limit of an opening formed by the head part extends in the axial direction at least to an imaginary line, which extends from the radially lower limit to the radially upper limit of the respective opening in line with a contact surface.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contact plane of both the carrier and the element have a non profiled surface. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a hydrodynamic lubricating condition, while the lubricating oil is defined to meet the requirements of an improved efficiency push belt.

Abstract: In a belt type continuously variable transmission having a variable width drive pulley, a variable width driven pulley, and a metal V belt, which is disposed around the drive and driven pulleys, the contour of the surfaces (V faces) in contact with the metal V belt in the cross-sectional view through the axes of the drive and driven pulleys is an arc that has a first radius of curvature rp and is convex to the metal V belt. The contour of the surfaces (V faces) in contact with these two pulleys in the cross-sectional view perpendicular to the longitudinal direction of the metal V belt is an arc that has a second radius of curvature re and is convex to the drive and driven pulleys.

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: Belt for use in a continuous variable transmission, comprising an endless carrier for taking op tensile forces, and a plurality of transverse elements moveable in the longitudinal direction along the carrier. The elements are provided with at least one saddle surface for contacting the carrier. The saddle surface defines an ultimate mutual position of the carrier and the elements relative to each other within the belt in radial direction, with a tapered lower element part including a rocking edge and an upper part extending radially beyond the carrier, when the carrier and surface are in mutual contact. Each axial end of the surface is adjoined by a limb extending predominantly in radial outward direction, thereby defining a recess open to the radial outer end of the element allowing free insertion of the carrier in the recess.

Abstract: A metal belt for a continuously variable transmission includes many metal elements assembled to an endless metal ring assembly, and is wound around drive and driven pulleys to transmit a driving force. A retainer comprising an endless resilient member deformable radially is disposed between a lower face of an ear of a ring slot in the metal element and a radially outer peripheral surface of the metal ring assembly. When the metal elements are inclined in such a manner that they are fallen forwards in the vicinity of an exit portion of the driven pulley, the metal ring assembly is prevented from strongly interfering with a lower face of the ear and a saddle face by a buffering action provided when the retainer is deformed radially, thereby preventing the wear of the metal belt to enhance its durability without increasing the processing cost for the metal elements.

Abstract: A power transmission belt having a load carrying band with a length, and a plurality of blocks attached to the load carrying band at preselected, spaced intervals along the length of the load carrying band. The plurality of blocks have a thickness (t), measured in a direction along the length of the load carrying band, and a width (W), measured in a direction transversely to the length of the load carrying band. Each of the plurality of blocks is made from synthetic resin material and has no shape-determining insert therein. The synthetic resin material is made from a synthetic resin having a bending modulus of 15 to 20 GPa. The ratio of t/W is from 0.11 to 0.20.

Abstract: A continuous variable transmission belt includes a set of nested metal rings, the set interacting with transverse elements provided slidably along the set, and the rings of the set being accommodated with small mutual play between each pair of adjacent rings, where for at least the majority of the pairs of adjacent rings the nominal value of the play is zero. The innermost and outermost rings having an elasticity modulus significantly lower than the intermediate rings.

Abstract: Belt for a continuous variable transmission, comprises an endless carrier for taking up tensile forces, and a plurality of transverse elements moveable in the longitudinal direction along the carrier. The elements are provided with at least one saddle surface for contacting the carrier. The saddle surface defines an ultimate mutual position of the carrier and the elements relative to each other within the belt in radial direction, with a tapered lower part including a rocking edge and an upper part extending radially above the edge and beyond the carrier, when the carrier and surface are in mutual contact. A thickness of the upper part of a majority of the elements in the longitudinal direction is larger than a largest thickness of the tapered lower part, such that an array of elements pushed against one another within the belt when mutually contacting through their upper parts assumes an arc-like shape.

Abstract: A driving belt for use in a continuously variable transmission comprising two V-shaped pulleys, which driving belt comprises a carrier consisting of two endless band packages lying side by side, on which transverse elements are disposed. Each transverse element includes two recesses positioned opposite each other for receiving the band packages, wherein a part of the transverse element is positioned between said band packages. The front side of the transverse element includes a projection, which can mate with a recess in the adjacent transverse element. Said projection and said recess are at least partially formed in the aforesaid part of the transverse element.

Abstract: Protrusions formed on an inner peripheral surface of at least an innermost metal ring of a belt for a continuously variable transmission are initially worn. An average contact width w of the protrusions, measured in a direction perpendicular to a direction of travel of the metal ring, is equal to or less than 16 ?m. The development of pitching at a top of the protrusion in a depthwise direction is inhibited. Shallow pitching is eliminated due to the contact between the protrusion and a metal element, which prevents the generation of cracks. When the metal ring and the metal element are conformed to each other, the average Hertz's surface pressure is lowered, whereby the pitching is difficult to occur. Also, the top of the protrusion is worn, leading to an improved surface roughness, whereby the lubrication is enhanced, resulting in an enhancement of metal ring durability.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contacting plane of the transverse element is shaped by an substantially flat surface, while the inner contacting face of the carrier contacting the contact plane the element has a profiled surface, the combined roughness Ra? of both surfaces being more than 0.6 ?m, preferably over 0.75 ?m. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a boundary lubricating condition, while the lubricating oil is defined to meet the requirements of prohibiting the occurrence of scratch, at least reducing the urging thereof considerably.

Abstract: A belt fabric which is provided at a part of a power transmission belt on which frictional forces act is formed by dipping into a rubber solution prepared by dissolving a non cross-linked hydrogenated nitrile rubber composition, mixed with a polyethylene powder having a molecular weight in excess of 1 million and an organic peroxide as a cross-linking agent, in a solvent.

Abstract: A silent chain transmission mechanism includes a sprocket and a silent chain having link interleaved link rows each composed of plural randomly selected link plates and connected together by connecting pins. The outside dimensions of the link plate are smaller than the outside dimensions of a link, but the outside dimensions of the link match the design reference dimensions of a link plate capable of proper meshing with the sprocket. The requirement for manufacturing accuracy and the effort required for assembly of the silent chain are reduced. However, the silent chain travels on the sprocket on the chain traveling line so that improved noise, vibration and friction properties, and traveling stability are realized.

Abstract: A belt for a continuously variable transmission includes a metal ring assembly and a plurality of metal elements formed of a carbon steel and supported on the metal ring assembly. A recess of the metal element at which stress concentrates, namely, undercut portions of a root of a neck, a root of an engaging projection, and recesses of an element body, are removed. The carbon concentration in the removed portions is lower than that in the other potions, thereby enhancing the toughness, fatigue strength, and impact strength while maintaining, at a high level, the surface hardness of portions at which stress does not concentrate, thereby obtaining a wear resistant belt.

Abstract: A transmission belt for a continuously variable transmission includes, transverse elements (5) and an endless carrier (9) for keeping together the transverse elements (5), each transverse element (5) provided with a rocking edge (12) showing a curvature for allowing neighbouring transverse elements (5) to mutually tilt about an substantially axially oriented contact line (7) over a tilting angle (?), so that a part of the belt may pass along a longitudinally bent trajectory, the curvature of the rocking edge (12) defined such that it notionally displaces the contact line (7) in dependence on the tilting angle (?,?).

Abstract: In a belt for a continuously variable transmission, a first line on a lower edge of an element body of a metal element is determined, and a second line straightforwardly connecting a lower end of a V-face to which a load is applied from a V-groove in a pulley and an inner end of a saddle surface is determined, so that when a downward load is applied from a metal ring assembly to an outer end of the saddle surface, the folding-resistant strength of the element body is uniform laterally. The position of the recess is determined in the vicinity of a point of intersection of the first and second lines. The lower edge of the element body is defined by the first line inside the recess and by the second line outside the recess. The durability of the metal element can be enhanced by devising the shape of the lower edge of the element body of the metal element in this manner.

Abstract: The present invention relates to a belt for use in a continuously variable transmission, in particular for automotive application, comprising at least one set (7) of nested metal rings, the set interacting with transverse elements (3) provided slidably along the set, and the rings of the set being accommodated with small mutual play between each pair of adjacent rings, characterized in, that for at least the majority of said pairs of adjacent rings the nominal value of said play is zero.

Abstract: A drive chain suitable for use in a continuously variable transmission of a motor vehicle, the transmission having two pairs of spaced drive members about which the chain passes to transfer torque from one drive member to the other. The chain includes a plurality of link elements that include spaced, side-by-side plate links. The plate links include openings in which pairs of parallel rocker members are disposed for relative rocking movement of at least one rocker member about its longitudinal axis. The rocker members extend outwardly beyond the plate links and are retained in position by retaining members that engage particular rocker members. A method for stretching the chain is also disclosed in which areas of some of the plate links are plastically deformed before the chain is put to use.

Abstract: A drive belt (1) includes at least one continuous band (22) engaged with a number of (plate-like) transverse elements (30) such that the elements (30) may slide freely along a longitudinal direction (L) of the continuous band (22), whereby the elements (30) are provided with a taper (31) allowing mutual rotation of adjacent transverse elements (30) about a transversely oriented axis (32) thereby defining a minimum radius of curvature (RMIN) at which the drive belt (1) may be bent in its longitudinal direction (L) and whereby the continuous band (22) is provided with an internal residual stress distribution conforming to a longitudinally bent posture having a pre-bending radius (RPB), characterized in that, the pre-bending radius (RPB) of the at least one continuous band (22) is considerably larger than twice the minimum radius of curvature (RMIN).

Abstract: A continuously variable, conical disk transmission including a torque-transmitting member in the form of a plate-link chain or a thrust link band. The chain includes plate links that are interconnected by pairs of rocker members that extend transversely relative to the chain movement direction. The thrust link band includes a number of thrust links that are in face-to-back contact and that extend transversely relative to the band movement direction. Each of the rocker members and the thrust links have ends that contact surfaces of the conical disks of the transmission for transmitting torque between the sets of disks. The ends of the rocker members and of the thrust links have a carbon-nitrided outer layer having a thickness of at least about 50 &mgr;m for increased durability. The surfaces of the conical disks that are contacted by the chain or the thrust link band can also be similarly treated.

Abstract: An element for use in an annular metal belt (1) is disclosed. The annular metal belt (1) transmits torque between two pulleys each having a V-shaped groove. The element has a flank capable of making frictional contact with the V-shaped groove for transmission of torque. A plurality of threads are disposed on the flank substantially in parallel to one another. The threads has a slight height relative to a dimension of the flank, and the top section of each thread is substantially planar.

Abstract: A method of manufacturing a CVT belt having two multi-ribbed belts. Each belt is engaged in an opposing slot in a transversely mounted clip. Each belt is retained in each slot by a flat belt which is sandwiched into each slot with the multi-ribbed belt.

Abstract: In a belt type continuously variable transmission that comprises a variable width drive pulley 5, a variable width driven pulley 8, and a metal V belt 7, which is disposed around the drive and driven pulleys 5 and 8, the contour of the surfaces (V faces 11) in contact with the metal V belt 7 in the cross-sectional view through the axes of the drive and driven pulleys 5 and 8 is an arc that has a first radius of curvature rp and is convex to the metal V belt 7, and the contour of the surfaces (V faces 46) in contact with these two pulleys 5 and 8 in the cross-sectional view perpendicular to the longitudinal direction of the metal V belt 7 is an arc that has a second radius of curvature re and is convex to the drive and driven pulleys 5 and 8.

Abstract: Driving belt provided with an enclosed tension element (2) and also with metal transverse elements (1) accommodated so as to be movable in a longitudinal direction along the tension element (2), which transverse elements are each designed with a body part (10), a head part (12) and a neck part (11) between the latter two parts, on either side of the neck part (11) between the body part (10) and the head part (12) two axially oriented openings (17) being present, in each of which openings a part of the tension element (2) is accommodated, the body part (10) being provided on either side with contact surfaces (13) oriented substantially in an axial direction and diverging from each other in the radial direction, and with a substantially axially oriented tilting line (14) and in which an upper limit (16) of an opening (17) formed by the head part (12) extends in the axial direction at least to an imaginary line (18), which extends from the radially lower limit (19) to the radially upper limit (16) of the respect

Abstract: The invention comprises a CVT belt having two multi-ribbed belts. Each belt is engaged in an opposing slot in a transversely mounted clip. Each belt is retained in each slot by a flat belt which is sandwiched into each slot with the multi-ribbed belt.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contact plane of both the carrier and the element have a non profiled surface. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a hydrodynamic lubricating condition, while the lubricating oil is defined to meet the requirements of an improved efficiency push belt.

Abstract: In a belt for a continuously variable transmission, a first clearance CLNH is defined between a projection and a recess formed on front and rear surfaces of a metal element, and a second clearance CLy is defined between an upper surface of a metal ring assembly and a lower ear surface of the metal element. By setting a relation, CLY>CLNH ensures, that when the metal element has been pitched, the projection and the recess can be first brought into contact with each other, thereby preventing a reduction in durability of the metal ring assembly. If the thickness of the metal ring assembly is represented by TL, and the vertical opening of the ring slot is represented by D, when the value of D/TL exceeds 11/8, the power transmitting efficiency is reduced. Therefore, the reduction in power transmitting efficiency can be prevented while maintaining durability of metal ring assembly by setting D/TL at a smaller value than 11/8.

Abstract: This invention relates to a guide bar for a drive chain, provided with two orifices for passage of a pintle pin, each orifice being substantially triangular in shape, with substantially identical edges, in the form of arc of circle and concave. The bar is provided with a recess which extends, from an outer edge of the bar, in the direction of an opposite edge, between the afore-mentioned orifices. The bar comprises, on either side of the recess, two series of two convex edges in the form of an arc of circle, each of these convex edges being centred on the geometrical centre of one of the concave edges of a triangular orifice.

Abstract: A transverse element for a push belt for a continuously variable transmission comprises a supporting surface for supporting a carrier of the push belt, and a pulley sheave contact surface for contacting pulley sheaves of the continuously variable transmission. A curved transition surface is connected to the supporting surface, whereas a distance surface is located between this transition surface and the pulley sheave contact surface. The distance surface is positioned lower than the supporting surface. When the transverse element collides with a relatively large collision element like another transverse element, protrusions may be developed exclusively on the distance surface. These protrusions are not capable of inflicting damage on a carrier which is to be laid on the supporting surface, because these protrusions do not protrude beyond the level of the supporting surface.

Abstract: A pushing block for the CVT belt has a hyper-eutectoid structure overall and exhibiting a structure in which spheroidal cementite having an area percentage of 0.4% or more are dispersed in a matrix of a martensite.

Abstract: A wear-elongation resistant silent chain includes guide link rows and articular link rows articulately connected together in an alternate fashion along the length of the chain by connecting pins inserted through respective pin holes of guide plates, guide link plates and articular link plates, with guide plate retainers secured to respective both ends of the connecting pins so as to keep the guide plates in position against removal from the connecting plates. The guide link plate and the articular link plates have different thicknesses so dimensioned as to balance the tensile strength of the guide link plate in one guide link row and the tensile strength of the articular link plates in the adjacent articular link row connected together by one of the connecting pins, thereby suppressing bending of the connecting pin. By thus suppressing the bending of connecting pin, wear elongation of the chain is prevented from occurring during power transmitting operation of the chain.

Abstract: Belt (3) for use in a continuous variable transmission, comprising an endless carrier (4) for taking op tensile forces within said belt (3), and a plurality of transverse elements (5) provided moveable in the longitudinal direction along said carrier (4), which elements (5) are provided with at least one saddle surface (8) for contacting the carrier (4), which saddle surface (8) defines an ultimate mutual position of the said carrier (4) and the said elements (5) relative to each other within the belt (3) in radial direction, with a tapered lower element part including a rocking edge (9) and with an upper element part (10, 11) extending radially beyond the carrier (4), at least when the carrier (4) and the saddle surface (8) are in mutual contact.

Abstract: The link belt for power transmission for a continuously variable transmission, with individual links (2) and a ring package (3, 5), which holds the links (2) together, contains an additional, outer ring package (4) for the purpose of absorbing the radial forces generated on the links (2) is provided, which is arranged around the link belt (1) and is mounted such that it can no longer rotate along with the link belt (1), however is still able to follow the strip's adjusting movement, wherein the ring package (5) ensures that the links are guided and held together.

Abstract: The present invention is a transverse element for a drive belt for a continuously variable transmission. The drive belt includes two endless carriers, wherein transverse elements are continuously arranged along the entire length of the carriers. The transverse elements are on both sides provided with recesses for at least partially receiving the carriers. Furthermore, the transverse elements include supporting surfaces for supporting the carriers, as well as pulley sheave contact surfaces for the purpose of contact between the transverse elements and pulley sheaves of the continuously variable transmission. A convex transition region which has two parts having different curvature radii is situated between a supporting surface and a pulley sheave contact surface, wherein a first curvature radius of a first part at the side of the supporting surface is larger than a second curvature radius of a second part at the side of the pulley sheave contact surface.

Abstract: Belt for use in a continuous variable transmission, including an endless carrier for taking up tensile forces within the belt, and a plurality of transverse elements provided moveable in the longitudinal direction along the carrier, the elements provided with at least one saddle surface for contacting the carrier, the saddle surface defining an ultimate mutual position of the carrier and the elements relative to each other within the belt in a radial direction, with a tapered lower element part including a rocking edge and with an upper element part extending radially above the rocking edge and beyond the carrier, at least when the carrier and the saddle surface are in mutual contact.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contact plane of both the carrier and the element have a non profiled surface. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a hydrodynamic lubricating condition, while the lubricating oil is defined to meet the requirements of an improved efficiency push belt.

Abstract: In a heavy duty power transmission V-belt B formed by engaging tension members 1 and 1 with a plurality of blocks 10, 10, . . . , to prevent as much as possible each block 10 from producing failure at the high-speed running of the belt, a fitting part 12 of each block 10 has an indent 22 formed by upwardly recessing a portion of a resin part 17 located between an upper ridge 14 and an innermost abutment surface 20 of the fitting part 12. Thereby, no edge exists between the innermost abutment surface 20 and the upper ridge 14 so that stress can be distributed. This prevents the occurrence of a crack in the resin part 17 due to stress concentration on the edge, the occurrence of a crack in a reinforcement 18 of each block 10 beginning at the leading end of the crack in the resin part 17, and in turn the fracture of an upper beam 18a of the reinforcement 18, thereby providing enhanced resistance against failure of the block 10.

Abstract: Notched areas are provided on the outer periphery of a flat plate in the coining process to allow material of said plate flow more easily toward the periphery during the coining process. Use of flat plate provides a more economical way of making elements with accurate size and dimensions for continuously variable transmission belt.

Abstract: A continuously-variable-ratio transmission belt includes a beltlike continuity element having a body made of elastomeric material and in turn having inner teeth and outer teeth and a number of threadlike longitudinal inserts embedded inside the body; and a number of separate friction blocks which are made of plastic material, are co-molded onto the continuity element so as to each incorporate one tooth of the inner teeth and one tooth of the outer teeth, and are each defined by two lateral surfaces converging inwards of the belt and cooperating with respective sides of a groove of a trapezoidal-grooved pulley.

Abstract: A metal belt, comprising a metal band (18) passed around a drive pulley (12) and a driven pulley (15) and a plurality of elements (19) disposed laminatedly in the extending direction of the band; each element being formed of wire material and further comprising a body part (31) in contact with the pulley, vertically installed parts (32) erected from both sides of the body part, and a pair of hook parts (33) which extended from the vertically installed parts and disposed opposedly to each other, wherein an opening part (34) is formed with the body part and both hook parts and, because the band (18) is inserted into the opening part (34) of each element so as to prevent the element from falling down from the band, a falling prevention body (20) is disposed in the opening part overlappingly with the band (18).

Abstract: A driving belt for use in a continuously variable transmission includes two V-shaped pulleys. The driving belt includes a carrier of two endless band packages lying side by side, on which transverse elements are disposed. Each transverse element includes two recesses positioned opposite each other for receiving the band packages, so that a part of the transverse element is positioned between the band packages. Each recess includes an inside surface facing towards the band package, wherein the portion of the inside surface that is formed by the aforesaid part of the transverse element includes an acute angle, near the underside of the band packages, with the plane in which the band packages lie.