Abstract: The present disclosure describes a gearshift mechanism for adjusting a gear ratio between a traction means, such as a chain, and a multi-sprocket gear set which can be rotated around an axle. The gearshift mechanism is configured to move the traction means in relation to the sprockets, such that an adjustment element is moved into the rolling motion of the traction means, thereby causing movement off of one sprocket and movement onto another sprocket.

Abstract: A rear derailleur is provided for a bicycle. The rear derailleur has an upper alignment assembly and a lower alignment assembly pivotally connected via a linkage assembly. The upper alignment assembly is pivotally attached to the bicycle along a b-knuckle mounting axis, and the upper alignment assembly includes a motor assembly to pivot the upper alignment assembly along an upper rotatable axis that is generally perpendicular to the b-knuckle mounting axis. The lower alignment assembly is pivotally attached to a pulley assembly along a p-knuckle mounting axis, and the lower alignment assembly includes a motor assembly to pivot the lower alignment assembly along a lower rotatable axis that is generally perpendicular to the p-knuckle mounting axis.

Abstract: A bicycle rear sprocket comprises a sprocket support member, a first attachment portion, and a second attachment portion. The sprocket support member comprises a first support member and a second support member. The first support member includes a first radially outer portion and a first radially inner portion. The second support member includes a second radially outer portion and a second radially inner portion. The first support member faces the second support member in the axial direction to define an axial gap provided between the first support member and the second support member in the axial direction. The first radially outer portion of the first support member is configured to be attached to the second radially outer portion of the second support member via a bicycle sprocket positioned between the first attachment portion and the second attachment portion in the axial direction.

Abstract: A bicycle driving assembly is basically provided with a first sprocket cluster, a second sprocket cluster and a first actuator. The first sprocket cluster includes at least one first sprocket configured to be rotatable about a rotational axis. The second sprocket cluster includes at least one second sprocket configured to be rotatable about the rotational axis. The first actuator is configured to move the first sprocket cluster and the second sprocket cluster relative to one another in an axial direction of the rotational axis.

Abstract: A bicycle rear sprocket assembly comprises a sprocket support member, a first sprocket attachment portion, and a second sprocket attachment portion. The sprocket support member comprises a first support member and a second support member. The first support member includes a first radially outer portion and a first radially inner portion. The second support member includes a second radially outer portion and a second radially inner portion. The first support member faces the second support member in the axial direction to define an axial gap provided between the first support member and the second support member in the axial direction. A first sprocket is to be attached to the first sprocket attachment portion. A second sprocket is to be attached to the second sprocket attachment portion.

Abstract: A bicycle multi-gear cassette mountable to a wheel hub that generally includes a truncated conical shell and a plurality of toothed sprockets having different numbers of teeth. The shell includes a plurality of coaxial annular cylinders of variable diameter extending along an axis of the shell and a plurality of coaxial annular discs of variable diameter extending radially of the axis. The cylinders and discs are alternatingly arranged in a stepped sequence. The toothed sprockets are disposed on the shell and extend radially of the shell axis. At least one of the toothed sprockets includes a recess on a side facing an adjacent toothed sprocket having a smaller number of teeth. The recess includes a first region having a first depth and a second region having a second depth. The first depth is greater than the second depth. The shell and the plurality of toothed sprockets embody a single piece.

Abstract: A bicycle sprocket apparatus comprises a sprocket mounting member, a first sprocket, and a second sprocket. The sprocket mounting member includes a hub mounting portion and a sprocket mounting portion, wherein the hub mounting portion is structured to be mounted to a rotating hub that rotates around a rotational axis. The sprocket mounting portion includes a first sprocket mounting surface that faces in a first direction and a second sprocket mounting surface that faces in an opposite second direction. The first sprocket is disposed at the first sprocket mounting surface, and the second sprocket is disposed at the second sprocket mounting surface. A fastener fastens the first sprocket to the first sprocket mounting surface, and a chain supporting structure extends from the fastener in the first direction and projects in the first direction away from a side surface of the first sprocket that faces in the first direction.

Abstract: A freewheel is provided for mounting a plurality of sprockets on an axle of a bicycle. The freewheel basically includes an inner tubular body, an outer tubular body coaxially mounted on the inner tubular body with a bearing assembly rotatably coupling the inner tubular body to the outer tubular body. A one-way clutch is coupled between the inner tubular body and the outer tubular body to allow one-way rotation between the inner and outer tubular bodies. In the preferred embodiment, seven sprockets are mounted on the exterior of the outer tubular body. The bearing assembly has a pair of ball bearing races of the same diameter located at one end. An outer ball housing and a side plate are utilized in conjunction with the inner tubular body to fixedly secure the first and second ball bearings on the exterior surface of the inner tubular body. The inner tubular body with the bearings is then fixedly coupled to the outer tubular body so that the outer tubular body can rotate relative to the inner tubular body.

Abstract: A transport device in a packaging machine includes a plurality of circulating transport chains which each travel over at least one chain wheel. In order to be able to adjust the transport device to differing formats for the bulk product and/or the packaging, the chain wheels can be adjusted with respect to each other in a peripheral direction upon a support shaft. In order to effect as simple and compact a construction as possible, a hydraulic fastening device is provided for fixing the chain wheels relative to each other, wherein the fastening device can be deactivated by means of a releasing device to effect adjustment. The chain wheels can be radially fixed to the shaft by the hydraulic fastening device. It is however also possible for the chain wheels to be disposed on coaxial shaft members which can be adjusted with respect to each other in the peripheral direction and which can be fixed to each other by the hydraulic fastening device.

Abstract: A structure for mounting a motor of a planing machine includes a hollow base, an axle casing fitted in said base and provided with a spindle for connecting with a planing cutter, a first pulley arranged under said spindle so that a belt connects said first pulley with a second pulley of a motor, wherein said axle casing is provided at a bottom with an extension having a circular hole and a curved groove subtending the center of the circular hole, a motor cover is installed on one end of a motor and has a pair of lugs in which is fitted an end of said extension, a pin is inserted into said lugs and said circular hole to form a pivot therebetween, and a locking handle is threadedly engaged with one of said lugs so that said motor is fastened on one side of said axle casing.

Abstract: A freewheel is provided for mounting a plurality of sprockets on an axle of a bicycle. The freewheel basically includes an inner tubular body, an outer tubular body coaxially mounted on the inner tubular body with a bearing assembly rotatably coupling the inner tubular body to the outer tubular body. A one-way clutch is coupled between the inner tubular body and the outer tubular body to allow one-way rotation between the inner and outer tubular bodies. In the preferred embodiment, seven sprockets are mounted on the exterior of the outer tubular body. The bearing assembly has a pair of ball bearing races of the same diameter located at one end. An outer ball race or housing and a side plate are utilized in conjunction with the inner tubular body to fixedly secure the first and second ball bearings on the exterior surface of the inner tubular body.

Abstract: A rear derailleur for a bicycle includes a base member for attaching the derailleur to the bicycle, a movable member for supporting a chain guide, a linkage mechanism coupling the base member to the movable member so that the movable member is capable of movement relative to the base member, a biasing mechanism for biasing the movable member toward a wheel of the bicycle, and an actuating member for coupling to a control cable of the type having an inner wire that slides within an outer casing so that pulling the inner wire causes the movable member to move away from the rear wheel of the bicycle against the biasing of the biasing mechanism and releasing the control cable causes the movable member to move toward the rear wheel of the bicycle in accordance with the biasing of the biasing mechanism.

Abstract: A bicycle crankset for mounting a plurality of chainrings includes a crank arm having a first end for mounting a pedal and a second end having a boss for mounting to a crank axle, a chainring retainer for supporting at least one of the plurality of chainrings, and a reinforcement member. The chainring retainer has a first engagement member for engaging the boss, and the reinforcement member includes a second engagement member for engaging the boss. The chainring retainer includes a first center ring defining the first engagement member and a plurality of first arms extending radially outwardly from the first center ring. Similarly, the reinforcement member includes a second center ring defining the second engagement member and a plurality of second arms extending radially outwardly from the second center ring. The distal ends of the plurality of first arms may be connected to corresponding distal ends of the plurality of second arms.

Abstract: A bicycle derailleur operable by a control cable to shift a chain between a large gear and a small gear, includes a parallelogram link mechanism having a base member connectable to a bicycle frame, a support member, and a pair of pivotal links extending between the support member and the base member, and a return spring for biasing the support member in one direction. A shift control member connectable to the control cable is supported by the parallelogram link mechanism to be displaceable relative thereto between a first position for contacting the parallelogram link mechanism and a second position separated therefrom. The return spring is a tension coil type spring connected at one end thereof to the shift control member and at the other end to the parallelogram link mechanism. The return spring biases the support member in one direction through the shift control member.

Abstract: A freewheel of a bicycle includes a number of sprockets engaged on a sprocket ring. An outer thread is formed in the outer portion of the sprocket ring for engaging with a lock nut. The lock nut includes a number of serrated teeth formed on one side surface. An outermost sprocket includes an outer surface having an annular shoulder so as to define an annular surface. The annular surface includes a number of serrated teeth for engaging with the serrated teeth of the lock nut so as to solidly and stably securing the sprocket to the lock nut.

Abstract: The following technical means is provided to achieve a chain shift operation with a minimum of the guide pulley travel distance, to improve speed change efficiency and operatability, and to prevent the speed change assembly from protruding sideward:At a forward location of a sprocket cluster (2), a link base (8) of a pantograph link mechanism (12) is supported by a chain stay (7), and from this, an inner link (9) and an outer link (10) are extended. To respective free end portions of these links, there is connected a movable member (11), which pivotally supports a chain guide (15) which is elastically urged. The guide pulley travel control means (18) functions in such a way that when the pantograph link mechanism (12) is deformed, it would cause a guide pulley (13) of the chain guide (15) to move inward axially of the hub shaft and at the same time forwardly downward substantially along a radial path of the sprocket cluster (2).

Abstract: A transmission assembly for a bicycle which is able to achieve variations in rotational force and velocity through internal gearing mechanisms which require no variation in sprocket diameter. The transmission assembly includes a front and rear transmission means, and a chain which connects them. Each transmission means includes one or more sprockets and gear sets with which the chain connects. Each gear set then includes a sun gear, a plurality of planetary pinions which rotate and revolve around the sun gear, a ring gear encasing the planetary pinions, and a carrier to which the planetary pinions are attached. This assembly helps prevent the chain from derailling, quickens the shifting process, and simplifies the structure and construction of transmission assemblies for bicycles.

Abstract: A shift mechanism for a bicycle and the like wherein a chain is shifted from sprocket to sprocket by an operator controlling a lever to position a camming surface to direct a guide pawl to tilt a segment of one sprocket whereby the tilted segment aligns with a nontilted sprocket during chain shifting.

Abstract: An automatic transmission system for a chain-driving vehicle includes a frame having a crank-driven sprocket and a drive axle with a drive wheel supported on the drive axle and a multi-speed sprocket assembly for driving the drive wheel. A continous chain drive engages the crank-driven sprocket and is engageable with each of the sprockets of the sprocket assembly. An actuating means is supported on the drive wheel spaced from the drive axle and is actuated by centrifugal force for shifting the chain to respective sprockets of the sprocket assembly in response to changes in speed of the vehicle.