Abstract: A rear derailleur is provided for mounting to a bicycle. An upper body operationally engages the rear derailleur to the bicycle, and a lower body operationally engages a chain cage engaging a chain of the bicycle. Upper and lower link arms are pivotally connected to the upper and lower bodies. The upper link arm includes an actuating arm extending downwardly from the upper link arm through an aperture of the lower link arm. A cable for actuating the derailleur operationally engages the actuating arm for moving the chain cage relative to the bicycle.

Abstract: A drive hub for two-wheeled vehicles with a hub body and with a fixed axle and with a sprocket carrier on which a plurality of sprockets is provided. The sprocket carrier is rotatably supported on the axle by way of at least one bearing. The sprocket carrier includes a circumferentially closed sleeve device on which at least one sprocket is disposed radially outwardly and on which two axially spaced bearings are provided radially inwardly for rotatably supporting the sprocket carrier on the axle via the bearings.

Abstract: A bicycle gear assembly comprises first and second sets of cog wheels, each having at least three cog wheels of various sizes including a largest cog wheel and a smallest cog wheel. These two sets are oriented so that the largest cog wheel of the first set is aligned with the smallest cog wheel of the second set and vice versa, the first and the second sets of cog wheels define at least a first, second and third pair of substantially aligned cog wheels. Additionally, a chain is mounted about a first pair of the aligned cog wheels and a gear shift assembly is adapted to move the chain from the first pair of substantially aligned cogwheels to the second pair of substantially aligned cogwheels and from the second pair of substantially aligned cogwheels to the third pair of substantially aligned cogwheels.

Abstract: A bicycle rear derailleur includes a stationary member, a base member, a linkage mechanism, a movable member, a chain guide and an inner cable fixing portion. The stationary member non-movably attached to a bicycle frame and includes an outer cable receiving portion configured to receive an outer sheath of a control cable assembly. The base member is pivotally coupled to the stationary member about an axis spaced apart from a hub axis of a rear wheel. A movable member at one end of the linkage mechanism is movable relative to the base member in response to an inner cable that is attached to a portion of the linkage mechanism. The base member can move in response to tension applied by the inner cable without moving the chain guide which is coupled to the movable member.

Abstract: A bicycle gear assembly comprises first and second sets of cog wheels, each having at least three cog wheels of various sizes including a largest cog wheel and a smallest cog wheel. These two sets are oriented so that the largest cog wheel of the first set is aligned with the smallest cog wheel of the second set and vice versa, the first and the second sets of cog wheels define at least a first, second and third pair of substantially aligned cog wheels. Additionally, a chain is mounted about a first pair of the aligned cog wheels and a gear shift assembly is adapted to move the chain from the first pair of substantially aligned cogwheels to the second pair of substantially aligned cogwheels and from the second pair of substantially aligned cogwheels to the third pair of substantially aligned cogwheels.

Abstract: The present invention relates to a bicycle chain hanger, comprising a gear set, a slide bushing, a spring, a nut, and a quick removal wrench. The improvement comprising the gear is provided with wheel covers, inner rings, and snap rings on the two sides, a slide bushing passes through the inner ring, the middle section of one end of the slide bushing is provided with an outer expansion ring so that a spring can be put on the front screw of the quick removal wrench and locked with the nut on the other end through the bore of the bushing, therefore limiting the gear to rotate between the outer expansion ring and the nut; then, the other end of the slide bushing is put into the rear wheel axle hook of the bicycle and positioned with the quick removal wrench to replace the change gear set so that the chain can be cleaned conveniently.

Abstract: To achieve downsizing and weight reduction of a derailleur shaft and the mounting structure thereof and to improve the rigidity of the derailleur shaft without increasing the thickness thereof more than necessary. A transmission case is divided into left and right halves, and the left and right halves are provided with bosses therein having holes opposing each other. The bosses are brought into abutment with each other and united by fitting tightening bolts to the holes of the bosses and tightening the same. A sleeve-shaped derailleur shaft is fitted on the outer periphery of the bosses to support and mount the derailleur shaft. The derailleur shaft includes a hole at the shaft end thereof. A mounting position of the derailleur shaft is achieved by a pin inserted into the hole and a hole provided on one of the cases.

Abstract: A top/bottom pull front derailleur includes a base member, inner and outer links, a chain guide and a top/low adjustment mechanism coupled to the base member. The links are pivotally coupled between the base member and the chain guide. The inner link has a wire fixing part that can be used in top and bottom pull arrangements. The chain guide is configured to move between a retracted position and an extended position relative to the base member. The adjustment mechanism includes top and low adjusting bolts with longitudinal bolt axes angled more than zero degrees relative to a plane of the bicycle frame. The adjustment mechanism is mounted rearwardly of single attachment portion of the outer link or between a pair of attachment portions of the outer link. The bolt axes are preferably angled about 45 degrees or about 90 degrees relative to the plane of the frame.

Abstract: A bicycle gear assembly has first and second sets of cog wheels, each having at least three cog wheels of various sizes including a largest cog wheel and a smallest cog wheel. These two sets are oriented so that the largest cog wheel of the first set is aligned with the smallest cog wheel of the second set and the smallest cog wheel of the first set is aligned with the largest cog wheel of the second set, the first and the second sets of cog wheels define at least a first, second and third pair of substantially aligned cog wheels. Additionally, a chain is mounted about a first pair of the aligned cog wheels and a gear shift assembly is adapted to move the chain from the first pair of cogwheels to the second pair of cogwheels and from the second pair of cogwheels to the third pair of cogwheels.

Abstract: A bicycle front derailleur has a fixed member, a movable member, linkage assembly and cable attachment assembly. The cable attachment assembly has a cable fixing bolt, cable fixing washer and a first resilient member. The first resilient member is arranged to retain the cable fixing washer on the shaft portion of the cable fixing bolt is located. The fixed member includes a derailleur fixing bolt, a derailleur fixing washer, and a second resilient member. The second resilient member is arranged to retain the derailleur fixing washer on the shaft portion of the derailleur fixing bolt.

Abstract: A transmission apparatus is capable of retaining an endless transmission chain on a rotatable member, even where a small inter-axis distance remains between two rotatable shafts to which each of two rotatable members is drivingly connected. The transmission includes a drive sprocket member for connecting to a main drive shaft. The transmission also includes a driven sprocket member, connected to the output shaft in parallel with the main drive shaft and including a plurality of transmission sprockets. The transmission further includes a chain interconnecting both sprocket members, and a transmission shift mechanism for positioning the chain among the transmission sprockets. The drive sprocket member is supported at the main drive shaft in the rotary center line direction, in such a way that the chain is applied to both sprocket members in parallel with a plane crossing at a right angle with the rotary center line of the main drive shaft.

Abstract: This invention relates to stepless speed change bench drill, comprising a pedestal, a vertical post mounted on the pedestal, a worktable and a cabinet mounted on the vertical post, a driving shaft and a main shaft mounted on the upper portion of the cabinet, a motor for transmitting power to the driving shaft, a motor movable wheel and a motor stationary wheel mounted on the driving shaft, and a main shaft movable wheel and a main shaft stationary wheel mounted on the main shaft, a speed regulation shaft provided with a threaded section and mounted between the driving shaft and the main shaft, the threaded section is engaged with a threaded hole formed on a bearing block, the bearing block is simultaneously mounted on the main shaft, the speed regulation shaft is rotated by a speed regulation hand wheel.

Abstract: The invention is an improved belt drive system of the type having an automatic belt tensioner, an automatic belt tensioner pulley, a crankshaft pulley, an accessory pulley, and a power transmission belt trained about the automatic belt tensioner pulley, the crankshaft pulley, and the accessory pulley. It is improved by the inclusion of an initial tensioner.

Abstract: A sprocket includes a bore for receiving a bearing, and a pair of protecting casings engaged onto the sides of the sprocket for shielding and protecting the bearing, and for preventing dirty particles or the other particles from engaging into the bearing to damage the bearing, and for increasing the working life of the bearing and the sprocket. The bearing includes an inner sleeve having an orifice, the casings each includes a hub secured in the orifice of the inner sleeve. The casings each includes a peripheral fence having a chamber for receiving grease.

Abstract: A cable connecting mechanism for a bicycle component includes a cable connecting unit having a fastener opening and a fastener disposed in the fastener opening. The fastener includes a head and a shank including a locking portion disposed in the fastener opening and a threaded portion disposed between the head and the locking portion so that a space for receiving a cable therein is formed between the locking portion and the head. A locking member is disposed at the locking portion of the fastener for locking the faster to the cable connecting unit.

Abstract: An intake and exhaust damper assembly has a motor and fan assembly pivotally mounted for movement toward and away from a louvered rotatable blade damper.

Abstract: A cable connecting mechanism for a bicycle component includes a cable connecting unit having a fastener opening and a fastener disposed in the fastener opening. The fastener includes a head and a shank including a locking portion disposed in the fastener opening and a threaded portion disposed between the head and the locking portion so that a space for receiving a cable therein is formed between the locking portion and the head. A locking member is disposed at the locking portion of the fastener for locking the faster to the cable connecting unit.

Abstract: In mounting an engine (vertical crankshaft internal combustion engine) to a frame (support) through a plurality of vibro-isolating members, at least one vibro-isolating member is a vibro-isolating member which is disposed at a position where the tension and rotating torque of a belt wound around an output pulley are substantially perpendicular to each other, or a vibro-isolating member disposed on a flat surface which includes an output shaft therein and is in parallel to the tension. Alternatively, the vibro-isolating members are disposed symmetrically through a flat surface which is in parallel to the output shaft and the tension of the belt and includes therein the center of gravity, or at least one vibro-isolating member is disposed on the flat surface. Also, an axis of the vibro-isolating members is oriented to correspond to a direction of the rotating torque.

Abstract: A gas actuated derailleur for a bicycle includes a base member, a movable member supporting a chain guide, a coupling mechanism coupling the base member to the movable member so that the movable member moves relative to the base member, and an actuation mechanism responsive to compressed gas for causing the movable member to move relative to the base member.

Abstract: Transmission assembly, particularly for bicycles or the like, having an inside box-like body, a first chain ring associated with a pedal crank shaft and connected to a pinion by a first chain, and a second chain ring associated with a second shaft and rotating rigidly with said pinion. A second chain is associated with the second chain ring and is adapted to transmit the motion to a gearshift assembly constituted by a plurality of gears that can be selectively associated with the second chain by a derailleur. The gearshift assembly is rigidly coupled to a hub that supports a wheel in a cantilevered manner outside the box-like body.

Abstract: A bicycle rear derailleur jockey pulley assembly includes a cogwheel supported on a bearing. The bearing includes an outer ring supporting the cogwheel, an inner ring disposed radially inwardly of the outer ring, and a plurality of rolling members disposed between the inner ring and the outer ring. The outer ring is capable of movement relative to the inner ring in an axial direction so that the jockey pulley may follow the axial movement of the chain after shifting.

Abstract: A derailleur cable router changes the direction of a derailleur cable operatively attached to a rear derailleur to a bicycle frame. The rear derailleur is actuated by variation in tension applied to the derailleur cable from a direction rearward of the derailleur. The tension in the derailleur cable is controlled by a shifter attached to a distal end of the derailleur cable, the shifter being mounted to the bicycle frame forward of the derailleur. The derailleur cable includes a cable housing around at least a portion of the derailleur cable with the derailleur housing being fixed against lengthwise movement relative to the bicycle frame by attachment to the bicycle frame. The derailleur cable router includes a frame having a first and a second end. A housing is provided at the first end of the frame and the housing is attachable to a derailleur cable housing. A second housing is provided at the second end of the frame, the second housing being attachable to a derailleur cable feed of a rear derailleur.

Abstract: There is disclosed a bicycle speed change operation assembly wherein the speed change operation can be performed during the braking operation, and the speed change can be made in an optimum way in relation to various running situations.

Abstract: An improved chain guide pulley or derailleur pulley for use with a bicycle rear derailleur system. The chain guide pulley has a guide sprocket portion and a bearing portion. The sprocket portion has, on a circular outer periphery, a plurality of teeth cut thereon. The teeth have dimensions so as to engage an endless drive chain and a cylindrical shaped inner peripheral surface defining thereby a bearing aperture. The bearing is dimensioned to be in an interfitting relationship with the guide sprocket and be attachable to the bicycle rear derailleur system. The teeth thickness dimension is not more than about three-fourths of a minimum distance between opposed pairs of roller link plates of the drive chain such that a less accurate alignment of the chain guide pulley with any one of the rear sprockets is required to effectively cause the drive chain to shift from any one of the sprockets to any other sprocket of the rear sprocket cluster.

Abstract: A dual driven cycle and a kit for converting conventional, single driven cycles into dual driven cycles are disclosed. The invention is suitable for accommodating bicycles, motorcyles, dirt bikes, and other conventional cycles. These cycles have the known elements of a pedal-gear-chain driven first wheel and a non-driven second wheel. The kit comprises four general elements. First, a sprocket is connectable in fixed relation to the non-driven second wheel for conjoint movement with that wheel. Second, to receive power from the conventional drive train, a drive gear is mounted on either the pedal gear or chain of the cycle. Third, a cable gear is provided for mounting with respect to the cycle's frame and meshing with the sprocket. This cable gear drives the sprocket and, of necessity, the cycle's previously non-driven second wheel. The final general element of the kit is a rotatable cable which connects the cable gear to the drive gear and transfers the rotational motion of the drive gear to the second wheel.

Abstract: A dual driven cycle and a kit for converting conventional, single driven cycles into dual driven cycles are disclosed. The invention is suitable for accommodating bicycles, motorcycles, dirt bikes, and other conventional cycles. These cycles have the known elements of a pedal-gear-chain driven first wheel and a non-driven second wheel. The kit comprises four general elements. First, a sprocket is connectable in fixed relation to the non-driven second wheel for conjoint movement with that wheel. Second, to receive power from the conventional drive train, a drive gear is mounted on either the pedal gear or chain of the cycle. Third, a cable gear is provided for mounting with respect to the cycle's frame and meshing with the sprocket. This cable gear drives the sprocket and, of necessity, the cycle's previously non-driven second wheel.

Abstract: A drive mechanism especially useful in assemblage with a harmonic drive transmission for providing a desired rotational input to the wave generator of the harmonic drive transmission, and allows for a wide speed range selection while minimizing component wear, instability, and heat generation problems. Such a harmonic drive assembly is particularly useful in powering a controlled infeed or chill stand in a printing press and permits the precise adjustment of the tension of the continuous paper web moving through such a press. The drive mechanism supplies rotational movement from the input shaft of the harmonic drive transmission to the wave generator tuner shaft and includes pulley means operatively coupled to the input shaft, an arm assembly mounted for pivotal movement about the tuner shaft, and a positioning mechanism for precisely pivoting the arm assembly as desired.

Abstract: A treadmill exercising apparatus comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, over which an endless nylon belt is trained. The treadmill frame at its head end is equipped with a cross member that pivotally mounts a motor assembly including an electric drive motor and shaft driven by same that is keyed to a stepping pulley aligned with a stepping pulley keyed to the head roller, and between which a drive pulley belt is tensioned by a tensioning device that subjects the motor assembly to uniform spring biasing action about the pivotal mounting of the motor assembly for uniformly tensioning the pulley belt into drive transmitting relation with the respective pulleys, and with the motor assembly including a hand crank arrangement for manually relieving the pulley belt tension for changing of the pulley belt with respect to the stepping pulleys for convenient speed changing of the treadmill belt.

Abstract: The invention concerns a gear-changer for a cycle comprising a support transversely movable with respect to a free wheel of the cycle, and a yoke which is pivotally movable on an axle of the support, this yoke rotatably supporting two rollers, one called "a chain tension roller" and the other "a chain guide roller".

Abstract: A derailleur cable router changes the direction of a derailleur cable operatively attached to a rear derailleur to a bicycle frame. The rear derailleur is actuated by variation in tension applied to the derailleur cable from a direction rearward of the derailleur. The tension in the derailleur cable is controlled by a shifter attached to a distal end of the derailleur cable, the shifter being mounted to the bicycle frame forward of the derailleur. The derailleur cable includes a cable housing around at least a portion of the derailleur cable with the derailleur housing being fixed against lengthwise movement relative to the bicycle frame by attachment to the bicycle frame. The derailleur cable router includes a frame having a first and a second end. A housing is provided at the first end of the frame and the housing is provided to a derailleur cable housing. A second housing is provided at the second end of the frame, the second housing being attachable to a derailleur cable feed of a rear derailleur.