Abstract: An idler sprocket shaft support device for use with chain-driven equipment (e.g., snowblowers) is provided. The support device includes a spacer through which the sprocket shaft passes through, and an elongate support member coupled to the spacer and extending through an aperture in an adjacent support plate. By locking the elongate support member within the aperture in the adjacent support plate at a particular distance, the spacer also is locked thereby holding the sprocket shaft at a desired positional setting.

Abstract: A tensioner for a fenestration unit operator includes a base and a guide including a track, the track slidably receiving the base such that the base is restricted to sliding in a first direction with respect to the guide along a sliding axis and a second direction with respect to the guide along the sliding axis that is opposite to the first direction. The tensioner includes a pawl and a ratchet each being a part of one of the sled and the guide, respectively, the pawl being in biased engagement with the ratchet to permit sliding in the first direction and restrict sliding in the second direction, the pawl being configured to be manually disengaged from the ratchet to permit sliding in the second direction. The tensioner includes a pulley coupled to the sled such that the pulley is free to rotate about a rotational axis that is transverse to the sliding axis.

Abstract: A work machine includes an undercarriage assembly. The undercarriage assembly includes a chassis and a ground-engaging mechanism for rotating around the chassis to move the work machine. A pair of rails is coupled to the chassis. A pair of sliders is coupled to a front-assembly. The sliders are aligned with the rails and movable relative to the rails to facilitate movement of the front-end assembly relative to the chassis.

Abstract: A clip lock for securing an expandable clip of a chain tensioner includes an elongated member having a first surface configured to engage an exterior surface of the chain tensioner and a second surface, spaced apart from the first surface, that is configured to engage the expandable clip and maintain the expandable clip in contact with an annular groove of a chain tensioner component preventing radially-outward expansion and axial movement of the expandable clip with respect to the chain tensioner component while the first surface engages that exterior surface of the hydraulic tensioner and the second surface engages the expandable clip.

Abstract: To provide a tensioner that improves, with a simple structure, maintenance operation efficiency, as well as enhances the sealing performance and the degree of freedom of check valve design. Either a plunger or a housing has a valve setting hole for disposing a check valve therein, and a valve movement restricting part that restricts movement of the check valve, disposed in the valve setting hole, toward an oil supply passage. A coil spring includes a small-diameter part and a large-diameter part continuous with the small-diameter part and disposed in contact with the check valve. The coil spring is disposed so as to urge the check valve toward the oil supply passage. The largest diameter of the large-diameter part is set larger than the inner diameter of the valve setting hole.

Abstract: In one embodiment, the present invention relates to a belt tensioning device for a hollow blind that comprises: a holder seat equipped with a lower belt gear on the top portion of the holder, the holder seat is in clearance fit with a lumen of a side frame of the hollow blind and is provided with a group of V-shaped slots from top to bottom therein, each V-shaped slot is equipped with a clip therein, the slip has a width slightly larger than the width of the lumen of the side frame of the hollow blind when being bent. The present invention allows the belt tensioning device to move along a single direction within the side frame of the hollow blind so that the distance between two belt gears can be gradually adjusted, thereby maintaining a proper tensioning force in the belt.

Abstract: A linear tensioner is provided for tensioning a traction mechanism provided in a drive system with a first adjustment element that has a hollow-cylindrical construction and a second adjustment element that is guided so that it can be moved longitudinally on this first element, wherein contact surfaces are formed on facing end surfaces of the adjustment elements, on which a compression spring actuating at least one of the adjustment elements in the tensioning direction is supported. A transport securing device is provided that prevents, in a specified locked position, a movement of the adjustment elements relative to each other by at least one locking element.

Abstract: Provided is a simple-structured tensioner that can ensure a smooth flow of oil while enabling a reduction in the production cost. A tensioner 10 includes a plunger 30 provided with a plunger through hole 32 extending from an outer circumferential surface to an inner circumferential surface of the plunger 30, and a tensioner body 20 provided with an oil supply hole 25 extending from an outer wall of the tensioner body 20 to the plunger bore 21. The oil supply hole 25 is formed in an elongated shape that extends along a protruding direction of the plunger.

Abstract: A sewing machine includes an upper shaft rotatable so as to drive a needle bar, a lower shaft rotatable so as to drive a feed dog, an upper-shaft pulley provided for the upper shaft, a lower-shaft pulley provided for the lower shaft, a belt linking the upper-shaft pulley with the lower-shaft pulley to synchronize respective rotations, and a belt adjusting mechanism contacting the belt and changing a belt length at a tensioned side of the belt where the belt is drawn in.

Abstract: A distributed drive includes a frame, a main sprocket, and a plurality of drive assemblies mounted therearound for rotation of the main sprocket. The main sprocket has a circumferential drive rim around which the drive assemblies are mounted in driving engagement with the drive rim so as to selectively rotate the main sprocket relative to the frame. Each drive assembly includes at least two auxiliary sprockets lying substantially in the plane of the main sprocket. An endless belt is mounted around the auxiliary sprockets so that a span of the endless belt spans between a pair of the auxiliary sprockets in an arc-of-contact with the drive rim. At least one of the two auxiliary sprockets is a selectively driven drive sprocket for selective rotation of the main sprocket.

Abstract: Provided is a chain tensioner that can, with a simple structure, supply sufficient and necessary oil when restarted after a long time after the stop of oil supply, and control pressing force in accordance with operating conditions during the drive, thereby reducing vibration of the chain not only when restarted but also during the drive. In a chain tensioner 100 in which a plunger 120 inserted in a plunger bore of a tensioner body 110 is biased outward by biasing means 140 provided in an oil pressure chamber 101 to be extendable and contractible, an oil supply hole 114, an oil supply space 102, and a plunger hole 124 that together form a continuous oil supply passage is formed in such a shape that an oil amount changes in accordance with a position of the plunger 120.

Abstract: A tensioning system with restoring action for tensioning a flexible drive means is provided, in particular a drive chain of an internal combustion engine, composed of a tensioning apparatus and a restoring device. The tensioning apparatus comprises a housing, a tensioning piston which is guided in a movable manner in the housing and which has a detent profiling, and a detent hook for the stepped adjustment of the working range of the tensioning piston, wherein the detent hook has a clamping region for engaging into the detent profiling in the tensioning piston. Here, a retraction stop is provided at the housing, at which retraction stop, in an abutting state of the detent hook, a further retraction movement of the tensioning piston into the housing is prevented by virtue of the clamping region being clamped on the detent profiling.

Abstract: The present invention relates to a tensioning device having a mounting plate; a tensioning roller centered on a roller axis and mounted movably on the plate, with at least one degree of rotational freedom around a pivot axis that is off-centered relative to the roller axis between at least one initial configuration, a mounting configuration and a final configuration for tensioning the traction member positioned on the tensioning roller. The device includes means for locking the tensioning roller relative to the mounting plate in the different configurations of the tensioning device. The tensioning device has at least partially removable means for indexing the position of the tensioning roller relative to the mounting plate in the final configuration. The invention also relates to an engine equipped with at least one traction member and at least one tensioning device. The invention also relates to a method for implementing such a tensioning device.

Abstract: A chain guide having excellent durability is provided. The chain guide includes a guide base arranged along a portion of an outer periphery of a chain for transmitting torque and elongated in the direction in which the chain travels; a plurality of roller shafts attached to the guide base so as to be spaced apart from each other along the direction in which the chain travels; and rollers rotatably supported by the respective roller shafts. The distance between the centers of each adjacent pair of the rollers is set to be shorter in the area where a larger load is applied to the rollers.

Abstract: Drive means for the polygonally-compensated drive of a sprocket, comprising two pulling means wheels (1, 2), a pulling means (3) running on them with an top span (31) and a bottom span (32), and a tensioning means acting on the pulling means (3), wherein the tensioning means comprises a first non-circular compensation wheel (4), which can come into contact with the top span (31), a second non-circular compensation wheel (5), which can come into contact with the bottom span (32), a rocker (6) adapted for rotatably receiving the first compensation wheel (4) and the second compensation wheel (5), wherein the rocker (6) is pivotably supported on a fixed bearing. The invention also relates to a chain drive, comprising at least a sprocket (7), a drive means, wherein the sprocket (7) is driven by the drive means, wherein the drive means is a drive means according to at least one of the claims 1 to 17.

Abstract: A belt tensioner includes a support housing at least in part defining a spring cavity and an arm pivotally attached to the support housing. A spring is located in the spring cavity and is operatively connected to the arm and the support housing to bias the arm about a pivot axis toward an unloaded position relative to the support housing. A damping member includes a hub and deflectable, force-applying elements that are connected to and spaced apart about a periphery of the hub. The force-applying elements are biased toward a contact surface of the arm to apply a frictional force between the contact surface and the force-applying elements to impede rotation of the arm relative to the support housing.

Abstract: A tensioner comprising a base comprising a first portion, an arm comprising a second portion, the arm pivotally connected to the base, a pulley journalled to the arm, a resilient member compressively disposed between the first portion and the second portion, the resilient member comprising a gap within which the first portion and the second portion are disposed, and the resilient member comprising a bore, the bore engaging the arm.

Abstract: A loop cord tension device assembly includes a housing, a spring member connected to the housing, a loop cord retention member connected to the housing, and a locking body connected to the spring member. The loop cord retention member has a channel sized and configured to receive a portion of a looped cord. The locking body is moveable from a locked position to an unlocked position. The portion of the loop cord received within the channel of the loop cord retention member is not rotatable when the locking body is in the locked position and the portion of the loop cord received within the channel of the loop cord retention member is rotatable when the locking body is in the unlocked position. The loop cord tension device assembly may be connected to the looped cord of a window covering and mounted to a structure to improve child safety.

Abstract: To facilitate a tension adjusting operation in the chain tension structure without changing a wheelbase of a vehicle. In the chain tension structure in which a chain is wound around a drive sprocket wheel which is arranged below a vehicle body frame and a driven sprocket wheel which is mounted on a rear wheel side and tension is imparted to the chain by a tension roller, the tension roller is mounted in a state that a hexagon socket head cap screw which constitutes a rotary shaft of the tension roller is inserted into an elongated hole which is opened in a plate-like projecting portion formed on the vehicle body frame.

Abstract: Rolling bearing, for a tensioning roller, comprising an inner race, an outer race mounted so as to rotate about the inner race and at least one row of rolling elements placed between the inner race and outer race, the said inner race comprising an axial portion extending axially beyond the outer race. The rolling bearing comprises an insert fitted into an open-ended bore made in the axial portion of the inner race.

Abstract: A pulley holder for rotatably supporting a pulley around which a belt is wound, in which the pulley holder includes a shaft having a shaft body for supporting the pulley and a projection at least one end of the shaft body in its axial direction, and a holder body having a bearing for supporting the shaft body, and a fitting part for fitting the projection. Since the projection is biased from an axis of the shaft body, once the projection is fit into the fitting part, the shaft body would not rotate around the axis. Accordingly, a friction wear of the bearing of the holder body is prevented and thus a shift in conveying a carriage is prevented.

Abstract: A new asymmetrically damped tensioner is provided utilizing a bearing-ramp clutch. During normal operation, the bearing-ramp clutch enables the tensioner arm to pivot in a first direction to take up belt slack with negligible frictional damping applied to the motion of the tensioner arm. When the tensioner arm pivots in a second direction, away from the belt, however, in a condition commonly known as wind-up, the bearing-ramp clutch locks against a fixed internal surface and creates a frictional damping force that is applied to the tensioner arm. This frictional linkage provides asymmetric frictional damping to the tensioner to limit movement in the second direction to mitigate wind-up.

Abstract: A belt tension adjustment apparatus and a robot arm having the belt tension adjustment apparatus are disclosed. The belt tension adjustment apparatus includes a tension measurement part for measuring tension of a belt running on an endless track, a tension adjustment part for pressing the belt in a direction inclined with respect to a surface of the belt to apply a pressing force to the belt, and a controller for controlling the tension adjustment part depending on the measured tension. The belt tension adjustment apparatus prevents variation of a running speed of the belt and maintains tension of the belt.

Abstract: A driving mechanism for a labeling machine includes a plurality of driving arm assemblies and a gear set. The driving arm assemblies and the gear set are independent and can rotate quickly and are less likely to be worn off, and can drive feeding wheels coupled on axles to rotate concurrently to draw and convey a roll of film. A dust guarding plate is provided to surround a base. The driving mechanism provides secure transmission and simple repair and maintenance.

Abstract: A driving mechanism for a labeling machine aims to drive a transmission assembly thereof from a power source through a linking member such as a belt. The transmission assembly concurrently drives rotation of an axle assembly so that a feeding wheel coupled on an axle can draw and convey a roll of film. A belt with teeth formed on two sides serves as a transmission member of the transmission assembly to transmit rotation to two axle wheels. The transmission assembly can transmit rotation accurately, rapidly and concurrently. The structure of the transmission assembly is simplified. Wearing can be reduced. Repair and maintenance also are easier.

Abstract: An adjustable chassis dynamometer includes a fixed roller, an adjustable roller that moves with respect to the fixed roller, and at least one sensor that detects a rotational speed of the fixed or adjustable roller. A belt drive synchronizes rotation of the rollers. The belt drive includes a fixed pulley associated with the fixed roller, an adjustable pulley associated with the adjustable roller, and a tensioner pulley. A belt is provided with an inner surface and an outer surface, and surrounding the fixed, adjustable, and tensioner pulleys, such that each pulley engages the belt's inner surface. The belt drive further includes an idler pulley that moves with the adjustable pulley, is located outside of the belt, and engages the belt's outer surface.

Abstract: Tensioning roller device including a non-rotating central part around which is rotatably mounted a pulley-forming rotating part, and a protective cap mounted on one end of the central part and extending radially outwards so as to form a narrow passage and/or a baffle with the rotating part, the cap including means for axial fastening to the non-rotating central part and means for angular fastening to the non-rotating central part.

Abstract: Drive means for the polygonally-compensated drive of a sprocket, comprising two pulling means wheels (1, 2), a pulling means (3) running on them with an top span (31) and a bottom span (32), and a tensioning means acting on the pulling means (3), wherein the tensioning means comprises a first non-circular compensation wheel (4), which can come into contact with the top span (31), a second non-circular compensation wheel (5), which can come into contact with the bottom span (32), a rocker (6) adapted for rotatably receiving the first compensation wheel (4) and the second compensation wheel (5), wherein the rocker (6) is pivotably supported on a fixed bearing. The invention also relates to a chain drive, comprising at least a sprocket (7), a drive means, wherein the sprocket (7) is driven by the drive means, wherein the drive means is a drive means according to at least one of the claims 1 to 17.

Abstract: A driving mechanism for a labeling machine aims to drive a transmission assembly thereof from a power source through a linking member such as a belt. The transmission assembly concurrently drives rotation of an axle assembly so that a feeding wheel coupled on an axle can draw and convey a roll of film. A belt with teeth formed on two sides serves as a transmission member of the transmission assembly to transmit rotation to two axle wheels. The transmission assembly can transmit rotation accurately, rapidly and concurrently. The structure of the transmission assembly is simplified. Wearing can be reduced. Repair and maintenance also are easier.

Abstract: A radiator apparatus for a vehicle may include a power transmitting mechanism configured to receive rotational force of an engine pulley and rotating a cooling fan thereby, and a driving belt tension maintaining device disposed between the power transmitting mechanism and the engine pulley and adjusting a relative distance therebetween to maintain tension of a driving belt sufficiently enough to transfer the rotation force of the engine pulley to the power transmitting mechanism, wherein the driving belt couples the power transmitting mechanism and the engine pulley.

Abstract: A self adjusting chain adjustment trolley comprising a stabilizer bar trolley assembly affixed to a chain tensioner assembly for translationally engaging a track, the stabilizer bar trolley assembly having a chain second end attachment point for engaging a chain second end; a sliding door attachment point affixed to the chain tensioner assembly for engaging a sliding door; and a track engagement assembly affixed to the chain tensioner assembly for translationally engaging the track. The chain tensioner assembly comprises a movable chain first end attachment point for engaging a chain first end and a force applicator attached thereto, such that the force applicator applies a predetermined amount of force to the movable chain first end attachment point to create a predetermined tension on the chain.

Abstract: The invention relates to an electric power steering for a motor vehicle, comprising a gear rack (11) that is positioned axially displaceable inside a steering housing (1) and can be driven by an electric servomotor (16), arranged inside a motor housing (7), with the aid of a belt (14) and a gear (12) for assisting with the steering. A simple and reliable belt tensioning is possible by providing an insertion wedge (21) between the motor housing (7) and the steering housing (1), which pushes the motor housing (7) away from the steering housing (1) for the tensioning of the belt (14).

Abstract: A tensioning apparatus includes a first C-shaped beam frame spaced apart from a second C-shaped beam frame. A first air cylinder is suspended from the first beam frame and a second air cylinder is mounted on the second beam frame. A carriage assembly is situated adjacent to the first and the second air cylinders. At least two pairs of guide members are supported on opposing corners of a support member of the carriage assembly. The pairs of guide members guide the carriage assembly along a longitudinal extent of the first and the second beam frames. The guide members travel along distal edges of flanges of the beam frames. A power operated means actuates movement of the carriage assembly along the first and second beam frames. A rope guide sheave is supported by the carriage assembly for free rotation.

Abstract: A toroidal type stepless speed changer including input and output disks (10) and (12), power rollers (20) provided between the disks with supporting shafts (28) thereof outwardly protruding, a single movable ring (30) with which the outer ends of the power roller supporting shafts (28) are engaged, the single movable ring being movable in the direction of the disk center shaft (14) with turning thereof being restricted, and a single adjustment belt (48) capable of making reciprocal motion in its turning (circumferential) direction so as to move the movable ring (30) along to disk center shaft. By the movement of the movable ring (30) in the disk center shaft direction that is caused by the reciprocal motion of the adjustment belt (48), the inclination of all the power roller supporting shaft is varied, thus changing the rotational speed between the input and output disks.

Abstract: A coupon insertion apparatus configured for sequentially inserting coupons into receiving containers, including a machine frame, at least one pair of opposed rollers mounted to the frame and adjustable between a closed position and an open position. A drive system includes a drive belt for simultaneously driving the opposed rollers in both of the positions. A tensioner is connected to the belt and is movable generally transversely to a direction of the adjustment of the drive rollers to maintain a designated tension on the drive belt.

Abstract: Tensioning roller device including a non-rotating central part around which is rotatably mounted a pulley-forming rotating part, and a protective cap mounted on one end of the central part and extending radially outwards so as to form a narrow passage and/or a baffle with the rotating part, the cap including means for axial fastening to the non-rotating central part and means for angular fastening to the non-rotating central part.

Abstract: A tension adjusting device is attached to an axle member of a driven wheel of a vehicle and is coupled to a forked frame member to adjust tension of a chain. The tension adjusting device has two tension adjusters joined to each side of the axle member that engages a guide recess of the forks of the frame member and support the axle fastener to secure the axle member to the two adjustment plates. The two adjustment plates include extending members that each extend over an end of each fork. An adjustment bore is drilled through the extending member and aligned with the ends of the forks. An adjustment stud is affixed through the adjustment bores to make contact with the end of the forks and to allow the axle member of the driven wheel to move in an adjustment slot to adjust the tension of the chain.

Abstract: The invention is an improved power transmission belt tensioner of the type having a first pulley adapted to communicate with a surface of a power transmission belt, a first arm supporting the first pulley upon which the first pulley is rotatably mounted via a first pulley bearing, a second pulley adapted to communicate with a surface of the power transmission belt, a second arm supporting the second pulley upon which the second pulley is rotatably mounted via a second pulley bearing. It is improved by the inclusion of a strut, a first attachment point for the strut, and a second attachment point for the strut, with the strut attached to the first and the second attachment points. The first arm is rotatably supported at a first pivot. The second arm is rotatably supported at a second pivot. The first pulley and the first attachment point are each laterally offset in relation to the first pivot and substantially balanced in terms of parasitic torque across the first pivot.

Abstract: A bottle-rotating device has a rotation device and an auxiliary pressing device. The rotation device corresponds to an induction coil in an induction cap sealer. The rotation device has a bottom plate, a top plate, a belt, a drive train and a driver. The belt and the drive train are mounted between the bottom plate and the top plate, and the drive train has a straight section corresponding to the induction coil. The belt is mounted around the drive train and is driven by the driver. The auxiliary pressing device corresponds to the rotation device. The auxiliary pressing device has a pressing strip securely held on pressing strip holders parallel to the straight section of the drive train. Accordingly, the bottles will be rotated and the foil on the bottle cap be heated evenly.

Abstract: A rotating drive apparatus comprises a plurality of shafts rotatably mounted in the apparatus substantially parallel to each other. At least one shaft is adapted to be operatively connected to a power source for rotation thereof. An idler is rotatably mounted on one of the shafts. A first band connector engages at least two shafts such that turning of the first band connector in response to rotation of one shaft causes rotation of the other. A second band connector engages the idler and at least two shafts such that the two shafts engaged by the second band connector rotate when the first band connector turns.

Abstract: The invention is an improved tensioner for tensioning a power transmission belt. The tensioner is of the type having a track, a carrier mounted in sliding relation with the track with two degrees freedom of movement, a pulley rotatably mounted upon the carrier and for engaging the power transmission belt, a spring biasing the carrier in longitudinal relation to the track, and a damping mechanism that modifies the biasing of the spring based upon movement of the carrier in relation to the track. It is improved by the damping mechanism having a shoe placed in asymmetrical damping relation to the carrier and the track. Further, the shoe includes a first friction bearing surface in mating relationship with a second friction bearing surface of the track.

Abstract: A drive belt stabilizer system for reducing non-longitudinal movement of a drive belt during operation. The drive belt stabilizer system includes a base, a lower member attached to the base, an upper member slidably positioned about the lower member in a vertical manner, a support stand attached to the upper member, a roller rotatably positioned within the support stand, a compression spring positioned within the lower member and the upper member for applying an expanding force relative thereto, and a securing shaft extending though the base and secured to the support stand for limiting the upward movement of the upper member. The roller is positioned beneath the return portion of a drive belt to be supported. A threaded nut is adjusted upon the securing shaft for adjusting the maximum height of the roller with respect to the drive belt.

Abstract: A shiftable toothed-belt drive, containing an engagement and disengagement device, in order alternately to mesh radially and demesh radially a toothed belt, which is guided around at least two gearwheels, with and from at least one of the two gearwheels. A disengager in the form of two externally profiled pulleys is urged axially along the shaft of one of the gearwheels supporting the toothed belt for radially raising the belt and demeshing the belt from the gearwheel. An engager engages the outside of the belt for tensioning the belt sufficiently to counter the effect of the disengager, move the pulleys apart and mesh the belt with the one gearwheel.

Abstract: A chain and sprocket mechanism having a first sprocket, a second sprocket, and a chain engaged with the first and second sprockets, such that rotating the first sprocket moves the second sprocket via the chain. A tensioner is engaged with the chain between the first and second sprockets so as to apply tension to the chain. The tensioner is at least partly made of an elastic material, such as rubber or flexible plastic. The flexible material isolates the tensioner from vibrations, cushioning the tensioner and inhibiting the conduction of vibrations such as engine noise through the chain and the tensioner. The tensioner may be made partially or entirely of elastic material. The tensioner may be adjustable in a linear motion, to adjust the tension in the chain. The tensioning mechanism may be made so as to be mechanically simple, using translational motion only, without pivotal motion. The tensioning mechanism also may be functional without the use of springs or other elastic structures.

Abstract: A bottle-rotating device has a rotation device and an auxiliary pressing device. The rotation device corresponds to an induction coil in an induction cap sealer. The rotation device has a bottom plate, a top plate, a belt, a drive train and a driver. The belt and the drive train are mounted between the bottom plate and the top plate, and the drive train has a straight section corresponding to the induction coil. The belt is mounted around the drive train is driven by the driver. The auxiliary pressing device corresponds to the rotation device. The auxiliary pressing device has a pressing strip securely held on pressing strip holders parallel to the straight section of the drive train. Accordingly, the bottles will be rotated and the foil on the bottle can be heated evenly.

Abstract: A drive belt stabilizer system for reducing non-longitudinal movement of a drive belt during operation. The drive belt stabilizer system includes a base, a lower member attached to the base, an upper member slidably positioned about the lower member in a vertical manner, a support stand attached to the upper member, a roller rotatably positioned within the support stand, a compression spring positioned within the lower member and the upper member for applying an expanding force relative thereto, and a securing shaft extending though the base and secured to the support stand for limiting the upward movement of the upper member. The roller is positioned beneath the return portion of a drive belt to be supported. A threaded nut is adjusted upon the securing shaft for adjusting the maximum height of the roller with respect to the drive belt.

Abstract: In an auxiliary-driving system in an engine, a crank pulley, a first auxiliary pulley and an idler pulley having a tensioner function are disposed in a triangular configuration with the idler pulley located in an uppermost position; and a second auxiliary pulley is disposed in a space surrounded by these pulleys. An endless transmitting belt is reeved around the pulleys. An inner surface of the transmitting belt is reeved around the first auxiliary pulley; and an outer surface of the transmitting belt is reeved around the second auxiliary pulley. Thus, the adjustment of the tension of the transmitting belt and other maintenance are facilitated, the transmitting efficiency of the transmitting belt can be enhanced, and compactness of the auxiliary-driving system itself and improvement in mileage can be achieved.

Abstract: The invention is an improved belt tensioner for a belt drive system having a belt tensioner, a first belt tensioner pulley, a crankshaft pulley, an accessory pulley, and a power transmission belt trained about the first belt tensioner, crankshaft, and accessory pulleys. The belt tensioner is of the type that includes an attachment point adapted to be affixed to a stationary point relative to a cylinder block of an engine, a track, and a first carrier mounted in sliding relation with the track with two degrees freedom of movement. The first belt tensioner pulley is rotatably mounted upon the first carrier for engaging the power transmission belt. A resilient member biases the first carrier in longitudinal relation to the track. The improvement comprises the tensioner including a second carrier mounted in sliding relation with the track with two degrees freedom of movement. A second belt tensioner pulley is rotatably mounted upon the second carrier for engaging the power transmission belt.

Abstract: The invention is an improved tensioner for tensioning a power transmission belt. The tensioner is of the type having a track, a carrier mounted in sliding relation with the track with two degrees freedom of movement, a pulley rotatably mounted upon the carrier and for engaging the power transmission belt, a spring biasing the carrier in longitudinal relation to the track, and a damping mechanism that modifies the biasing of the spring based upon movement of the carrier in relation to the track. It is improved by the damping mechanism having a shoe placed in asymmetrical damping relation to the carrier and the track. Further, the shoe includes a first friction bearing surface in mating relationship with a second friction bearing surface of the track.

Abstract: A drive belt tensioning method and assembly using a spring loaded, non-active tensioner. The spring is mounted between a base plate, and a tensioner arm, both of which rotate. A belt tensioning pulley is mounted on the tensioner arm, such that the belt tensioning pulley is adjacent to the drive belt. The tension of the spring causes the tensioner arm to rotate which causes the belt tensioning pulley to tension the drive belt. The spring chosen has a predetermined working length at which the drive belt has the desired tension. Because both the base plate and the tensioner arm rotate, the spring may be kept at this predetermined working length for each belt adjustment. This enables the drive belt to maintain the desired tension. An alignment index integral to the assembly may be used to ensure that the spring is at the predetermined working length.