Abstract: A technique capable of suppressing a rise in the temperature of a shock-absorber. A motorcycle includes a swing arm having a front end swingably supported by a body frame. A shock-absorber includes a rear end supported by the swing arm via a link and an upper end supported by the body frame via a support hole. A cylindrical reserve tank is connected to the shock-absorber for reserving the hydraulic operating fluid flowing into the shock-absorber, the reserve tank is arranged such that an axis thereof is positioned above the axis of the support hole provided in the upper end of the shock-absorber and extends in the width direction of a vehicle.

Abstract: A bicycle is disclosed having a control system with a user interface and an active suspension system. The control system includes a one or more sensors arranged to measure and transmit a signal indicative of the terrain over which the bicycle is being ridden. The active suspension system includes a valve box that is fluidly coupled to each chamber of the lower cylinder. An orifice in the valve box is changed in size in response to a signal from a sensor associated with the front wheel that changes the response of the suspension system due to changing terrain conditions. The user interface includes a selection device mounted to the handlebars that allows the user to change parameters of the active suspension system during operation of the bicycle.

Abstract: A suspension system for a steerable front wheel of a vehicle such as a motorcycle has two substantially identical, straight, elongate, tubular members that extend forwardly and downwardly from the vicinity of a handlebar of the vehicle along opposite sides of a lower rear quadrant of the front wheel and have open front end regions that at least partially enclose compressible coil suspension system springs. Elongate arms are pivotally connected to brackets that are rigidly secured either above or below the open front end regions of the elongate members, define surfaces that extend across the open front ends of the front end regions to be pressed against by the suspension system springs, and have upper end regions that support opposite ends of a front wheel's axle that extends between the two elongate arms. By adjusting the extent to which the suspension springs are compressed, the ride provided by the suspension system is adjusted.

Abstract: A non-uniform load is prevented from acting on a cross member to reduce the weight of the cross member in a saddled vehicle. In the saddled vehicle has a vehicle body frame 11 for suspending an engine 12, a swing arm 14 for suspending a rear wheel WR freely swingably, pivot portions 29 which are formed as a right-and-left pair, constitute a part of the vehicle body frame 11 and pivotably support the swing arm 14, a lower cross member 28 for joining the pivot portions 29, a rear cushion 32 for applying elastic force to the swing arm 14, a link mechanism 31 for joining the lower end 32A of the rear cushion 32, the swing arm 14 and the pivot portions 29, a link joint stay 70 which is formed at the rear side of the lower cross member 28 and joins the link mechanism 31, and a lower hunger 48 that is formed at the front side of the lower cross member 28 and fixes the engine 12, the link joint stay 70 and the lower hunger 48 are formed at the same position with respect to the vehicle width direction.

Abstract: A bicycle is disclosed having a control system with a user interface and an active suspension system. The control system includes a one or more sensors arranged to measure and transmit a signal indicative of the terrain over which the bicycle is being ridden. The active suspension system includes a valve box that is fluidly coupled to each chamber of the lower cylinder. An orifice in the valve box is changed in size in response to a signal from a sensor associated with the front wheel that changes the response of the suspension system due to changing terrain conditions. The user interface includes a selection device mounted to the handlebars that allows the user to change parameters of the active suspension system during operation of the bicycle.

Abstract: A bicycle comprising a front triangle and a rear wheel having a rear wheel axis, a rear wheel suspension system further comprising a link further comprising a first pivotal axis for connection to said front triangle and a second pivotal axis for connection to a rear wheel swingarm, wherein the distance from said second pivotal axis to a first vertical plane decreases during a first portion of suspension compression and increases during a second portion of suspension compression; and wherein said first vertical plane is defined as a plane which is perpendicular to the ground and offset in the direction of the rear wheel with respect to the first and second pivotal axis. During the first portion of suspension compression and during the second portion of suspension compression the front triangle remains stationary with respect to the first vertical plane.

Abstract: A bicycle comprising a front triangle and a rear wheel having a rear wheel axis, a rear wheel suspension system further comprising a link further comprising a first pivotal axis for connection to said front triangle and a second pivotal axis for connection to a rear wheel swingarm, wherein the distance from said second pivotal axis to a first vertical plane decreases during a first portion of suspension compression and increases during a second portion of suspension compression; and wherein said first vertical plane is defined as a plane which is perpendicular to the ground and offset in the direction of the rear wheel with respect to the first and second pivotal axis. During the first portion of suspension compression and during the second portion of suspension compression the front triangle remains stationary with respect to the first vertical plane.

Abstract: The invention relates to suspension systems comprising, in certain embodiments, a pivoting means concentric to a wheel rotation axis so that braking forces can be controlled by placement of an instant force center, and so that acceleration forces can be controlled by a swinging wheel link.

Abstract: A steering damper device for a saddle riding vehicle includes a tubular damper including a cylindrical damper cylinder and a piston rod slidably passed through the damper cylinder. Either the damper cylinder or the piston rod is supported on an upper frame or a down frame of the saddle riding vehicle. The upper frame extends rearwardly from a head pipe through which a steering shaft passes and which holds the steering shaft therein rotatably about an axis thereof. The down frame extends downwardly from the head pipe. The steering shaft rotates with a bottom bridge. The tubular damper is disposed such that an axis thereof is disposed on a vehicle width direction central plane. The tubular damper extends or contracts as the bottom bridge rotates. The tubular damper extends or contracts within a space between the upper frame and the down frames in a side view.

Abstract: A movement damping apparatus has a flow path through which a magneto-rheological fluid is pressed. A device that generates a variable magnetic field has a core around which a coil is wound as well as pole surfaces in the flow path. The magnetic field acts on the magnetorheological fluid by way of the pole surfaces. The coil is arranged within the flow path along with the core, the axis of the coil extending perpendicular to the direction of flow of the magnetorheological fluid. The flow path has a jacket made of a magnetically conducting material.

Abstract: A gear shift pertaining to a hub of a wheel with a quick lock. The hub has a gear which is supported round a shaft with an outer end and an inner end. The inner end of the shaft is suspended via a suspension device on a vehicle. The quick lock includes a rod which runs in a cylindrical hole which is concentric within and with the shaft and a catch which locks the wheel with the shaft to the suspension device. The gear shift includes the shaft, the rod and a control, all so adapted that the rod has a neutral position relative to the shaft and wherein a movement, relative to the shaft, of the rod from the neutral position in a direction from the outer end of the shaft towards the inner end of the shaft disengages the catch so that the wheel together with the shaft can be locked to and released from the suspension device.

Abstract: A rear wheel suspension system for a two-wheeled vehicle is provided. The suspension system includes a rear frame pivotally connected to a main frame by at least an upper linkage and a lower linkage. The linkages are positioned such that the pivotal connection between the rear frame and the lower linkage is forward of the pivotal connection between the main frame and the lower linkage. Further, the rear wheel suspension system includes a biasing member such as a spring or shock absorber which allows the suspension to absorb impacts resulting from obstacles or irregularities in the surface of a terrain.

Abstract: The invention relates to suspension systems comprising, in certain embodiments, a pivoting means concentric to a wheel rotation axis so that braking forces can be controlled by placement of an instant force center, and so that acceleration forces can be controlled by a swinging wheel link.

Abstract: A wheel suspension system having under powered acceleration a stable squat magnitude response.

Abstract: A swing arm suspension for reducing the number of parts to thereby reduce the number of man-hours for assembly, the weight and the cost. The swing arm suspension includes a pivot plate provided with a pivot shaft, a swing arm having a rear end portion supporting a rear wheel that is swingably mounted at a front end portion to the pivot shaft and a shock absorber that is mounted at an upper end portion to the swing arm and connected at a lower end portion through a link mechanism to a portion of the pivot plate at a lower level than the pivot shaft. An exposing portion is provided for exposing a shock absorber arrangement space to an upper space above the swing arm. At least one of a subtank and an adjuster as functional components of the shock absorber is located in the exposing portion.

Abstract: A saddle type vehicle includes a down tube extending downward from a head pipe for supporting a front fork, a rear wheel pivot unit provided on the down tube, and a rear wheel suspension device for supporting a rear wheel of the vehicle such that the rear wheel can pivot substantially upward and downward around the rear wheel pivot unit. The rear wheel pivot unit is disposed before an engine in the advancing direction of the vehicle. The engine is attached to the rear wheel suspension device such that the engine can pivot with the rear wheel suspension device.

Abstract: A support section structure for a swing arm provides a well-balanced state for the weight of the vehicle in a widthwise direction and for efficiently increasing the rigidity of a vehicle body frame without inviting a significant increase in the weight of the vehicle body. A swing arm is provided for supporting a rear wheel Wr for rotation and is supported for a rocking motion on a center frame. An output power shaft of a power source is transmitted to the rear wheel Wr through a drive shaft. A left outer side frame and a intermediate frame, which support a front end portion of the swing arm for pivotal motion, are provided on the center frame. A right outer side frame disposed on the outer side in the vehicle widthwise direction with respect to the drive shaft on the intermediate frame is provided integrally against removal on the center frame.

Abstract: The frame includes at its rear portion two bases (12, 13) extending substantially horizontally rearwardly so as to define between them a space for the reception of a rear wheel, and two stays (14, 15) extending obliquely toward one respective end of the bases (12, 13) and being connected thereto at an acute angle by connection elements, a pair of recesses for a rear wheel axle being disposed substantially at the intersection of the stays (14, 15) with the bases (12, 13) . Each recess of the pair of recesses has a first notch with a semicircular bottom (23) provided at one flattened end of a base and a second notch with a semicircular bottom (24) provided at a flattened end of a stay and disposed facing the first notch (23) such that the semicircular bottoms will be aligned with each other.

Abstract: Disclosed is an intra-wheel rear suspension system moveably supporting a rotating wheel relative to a frame via a concentric hub structure, the system exhibiting minimal side play or torsional play due to its unique bearing structure. The system includes an inner carrier assembly having an inner slide block with front curved bearing surface and a rear curved bearing surface. A non-rotating axle extends to either side of the inner slide block and is secured to the frame. An outer track frame that is adapted for rotatably supporting the wheel via any suitable concentric hub structure, has a curved aperture with front and rear curved bearing surfaces that engage the front and rear curved bearing surfaces of the inner slide block. The outer track frame moves arcuately up and down relative to the inner slide block in response to a shock absorbing displacement.

Abstract: A cycling device comprising a frame a plurality of pedals a plurality of wheels coupled to said frame, and a harness coupled to said frame wherein the harness allows a user to be coupled to said frame. In this case there can be for example, two driven wheels which are driven by the pedals and a non-driven guide wheel as well.

Abstract: A suspension system (12, 112, 212, 312, 412) suited to use in a wheelchair (10) or other transportation system includes a first member (30, 130, 230, 330, 430) and a second member (32, 132, 232, 332, 432), which is pivotable relative to the first member. One of the first and second members includes a socket (42, 142, 242, 342) in which a bushing (60, 160, 260, 360) is mounted which receives a rigid member, such as a shaft (150, 250, 350) and or insert (55, 155, 255, 355) therein, the rigid member being coupled to the other of the first and second members. The bushing develops a resistance force as the second member pivots relative to the first1 structural member. The resistance force resists further pivoting of the second structural member relative to the first member.

Abstract: The invention provides a suspension apparatus of a vehicle comprising a base end portion of a swing arm pivotally attached to a vehicle body so as to freely oscillate, and a wheel which is rotatably supported to a leading end portion of the swing arm. A first link is pivotally attached to a portion between the base end portion and the leading end portion of the swing arm. A second link is pivotally attached to a position which is below a pivot point to which the base end portion of the swing arm is pivotally attached in the vehicle body, and the first link and the second link are pivotally attached. One end of a cushion unit is pivotally attached to the vehicle body. Another end of the cushion unit is pivotally attached to one of the first link and the second link, in which the first link or the second link comprises an expandable link. The expandable link is energized in a contracting direction.

Abstract: To improve a swing arm support structure of a vehicle, thus making it possible to adjust a magnitude, timing, and the like of external force transmitted to a vehicle body frame. In a vehicle, in which a rear wheel is attached to a rear end of a swing arm made freely swingable with respect to a vehicle body frame, dogleg brackets are provided. The dogleg brackets include vehicle body frame coupling portions coupled to the vehicle body frame, and include engine support portions for supporting an engine. Further, the dogleg brackets are provided with swing arm support portions for supporting the swing arm which are provided apart and separately from the vehicle body frame coupling portions.

Abstract: A support section structure for a swing arm provides a well-balanced state for the weight of the vehicle in a widthwise direction and for efficiently increasing the rigidity of a vehicle body frame without inviting a significant increase in the weight of the vehicle body. A swing arm is provided for supporting a rear wheel Wr for rotation and is supported for a rocking motion on a center frame. An output power shaft of a power source is transmitted to the rear wheel Wr through a drive shaft. A left outer side frame and a intermediate frame, which support a front end portion of the swing arm for pivotal motion, are provided on the center frame. A right outer side frame disposed on the outer side in the vehicle widthwise direction with respect to the drive shaft on the intermediate frame is provided integrally against removal on the center frame.

Abstract: To provide a rear shock absorber arrangement structure for a motorcycle having no limitation on the arrangement flexibility and shape of a storage chamber. In a rear shock absorber arrangement structure for a motorcycle, including a unit swing type power unit U swingably connected to a body frame F and rotatably supporting a rear wheel WR, a rear shock absorber suspends the power unit from the body frame F. A storage chamber is disposed above the rear wheel WR. A lower end of the rear shock absorber is brought into connection at a position lower than the wheel-axle 0 provided in the power unit U as viewed from the side of the vehicle. An upper end of the rear shock absorber is connected to a portion lower than the storage chamber and near a bottom portion of the storage chamber.

Abstract: A two-piece bicycle frame pivotably attached together at a pivot point with a biasing mechanism adjacent to the point of attachment. The bias mechanism bears an angle of between 30° to 60° relative to true horizontal. Each frame section has a relative plane which planes in relation to one another bear an angle exceeding 180° when no weight is on the bicycle.

Abstract: A rear single-sided swingarm suspension for a motorcycle includes a single-sided swingarm that has an axle bearing assembly pivotably connected to the rearward end thereof for swinging motion in a plane parallel to the plane of travel of the swingarm. A cantilevered wheel axle is journalled in the axle bearing assembly and is affixed to the rear wheel. A control arm, which is shorter than the swingarm, extends generally parallel to the swingarm and is pivotably connected to the motorcycle frame at a point rearward of the forward end of the swingarm. The axle bearing assembly also is pivotably attached to the rear end of the control arm. The wheel axle is journalled in the axle bearing assembly at a point rearward of the rear end of the swing arm and on the opposite side of the swingarm from the control arm.

Abstract: A frame assembly for a two-wheel vehicle includes a front wheel fork and chainstays. Between the front wheel fork and the chainstays, the frame assembly further includes a saddle tube, a crank housing, and a lower tube connecting the crank housing to a steering tube. A parallelogram-shaped suspension assembly is attached to a rear end of the chainstays.

Abstract: A folding structure for a bicycle comprises a connector at the front end of a rear fork with a hole on the top side, the upper strut has a fixture with a hole corresponding to the hole of the connector to secure the connector thereat with a bolt, the opposite side of the fixture has a recess which secures a handle thereat, the rear fork also comprises a confining device, which allows the rear fork to swing with respect to the seat strut after the shock absorber is disengaged, thus save storage space.

Abstract: The present invention is directed to a suspension mechanism that is built into the rigid frame members of a vehicle such as a motorcycle to provide a softer ride while preserving the clean look of the rigid frame. The vehicle has a wheel mount for a wheel, a steering head for a steering handle, and a vehicle frame. The suspension mechanism comprises a lower frame member of the vehicle frame extending from the wheel mount, and an upper frame member of the vehicle frame extending from the wheel mount and being disposed above the lower frame member. An upper frame arm of the vehicle frame extends from the steering head and is movably coupled with the upper frame member at a location between the steering head and the wheel mount. The upper frame member is slidable relative to the upper frame arm along an upper arcuate path centered around a pivot axis disposed between the upper frame member and the lower frame member.

Abstract: A front suspension structure is provided having an axle support arm for connecting a front wheel axle and a front fork lower end that is light in weight and has high rigidity. An axle support arm has a substantially chevron shape when viewed from the side, with a front end section being formed as a two-legged section for connecting to an arm holder for a lower end of a front fork. The two-legged section is rotatably connected to the arm holder via a bolt. A rear end of the axle support arm includes a bearing section provided with a slot. The axle support arm is rotatably connected to an axle via the bearing section. Indentations that open upwardly are formed in a central part of the axle support arm with bearing sections provided on lower ends of the pushrods being fitted in the indentations and a bolt inserted into the bearing sections from a side direction.

Abstract: A foldable bicycle has a rear frame having a rear wheel assembled at a rear end thereof and located at a first side thereof. A seat tube is assembled at a front end of the rear frame and has a seat provided at a top thereof. A link tube has a rear end pivotally mounted to a lower end of the seat tube. A front frame is assembled at a front end of the link tube and has a front wheel assembled thereon and located at a first side thereof and in alignment with the rear wheel. A handlebar is pivotally mounted at a top of the front frame. A cushion is assembled between the rear frame and the seat tube.

Abstract: A rear suspension system for two-wheeled motor vehicles having a generally triangular configuration includes first and second spaced apart support axle plates having aligned apertures that receive an axle of a rear wheel of the vehicle. An upper arm assembly extends from an upper end of the support axle plates to a pivotal connection at a frame of the vehicle. A lower arm assembly is pivotally connected to a pivot arm assembly and the first and second support axle plates. A shock unit is pivotally connected to the lower arm assembly at one end, and to the vehicle frame at the opposite end. The system provides improved wheel contact with the ground and rear wheel control and stability.

Abstract: A mini-bike shock absorber, wherein, the crossbar extends upwards from peripheral of a head tube in arc to the rear of the bike until reaching and connecting to the seat tube. A pivoting tab is provided in the rear peripheral of the seat tube and a pivot is formed on the circumference at the bottom of the crossbar for the pivot to connect the seat stay that supports a rear wheel. An upright shock absorber is connected through the pivoting tab on the seat stay at where in relation to the seat tube to link to the seat stay for absorbing energy of shock transmitted from the seat stay.

Abstract: A rear suspension system for two-wheeled motor vehicles having a generally triangular configuration includes first and second spaced apart support axle plates having aligned apertures that receive an axle of a rear wheel of the vehicle. An upper arm assembly is pivotally connected between a frame of the vehicle and the first and second support plates. A lower arm assembly extends from the first and second support axle plates. The lower arm assembly is pivotally connected to a pivot arm assembly. A shock unit is pivotally connected to the lower arm assembly at one end, and to the vehicle frame at the opposite end. The system provides improved wheel contact with the ground and rear wheel control and stability.

Abstract: A rear suspension system for two-wheeled vehicles having a generally triangular configuration includes first and second spaced apart support axle plates having aligned apertures that receive an axle of a rear wheel of the vehicle. An upper arm assembly is pivotally connected between a vehicle frame and the first and second support plates. A lower arm assembly is pivotally connected between the vehicle's frame and the first and second support axle plates. First and second control arms are pivotally connected to a pivot arm assembly and to the upper arm assembly. A shock unit is associated with a lower arm assembly at one end, and to the vehicle frame at the opposite end.

Abstract: A new design and formula for enhanced rear suspension movement. This new invention of the multi linking, design incorporates twin non transverse upper and lower swing arms with a stabilizing link that forms a open configuration. I have built a prototype and studied other designs and found that my invention would not operate without the third stabilizing link to control the pivoting arm. This link is adjustable to set angle of axle support carriage and to support it as it moves. I have not found any other designs that function in this manner. The feature of the invention comes from the connection of the axle support carriage by two links and a stabilizing link that provides leverage for a live suspension system.

Abstract: The invention provides a motorcycle with hub steering, the axle of the hub being fixedly connected to first support arms and being disposed in such a manner that it can turn with respect to the hub body. Second support arms are arranged in such a manner that the front pivot points and rear pivot points lie on non-parallel lines. Attaching the front wheel in this way results in an improved suspension and increased stability of a motorcycle with hub steering.

Abstract: A rear suspension system for two-wheeled vehicles having a generally triangular configuration includes first and second spaced apart support axle plates having aligned apertures receive an axle of a rear wheel of the vehicle. An upper arm assembly is pivotally connected between a vehicle frame and the first and second support axle plates. A lower arm assembly is pivotally connected between the vehicles frame and the first and second support axle plates. First and second control arms are pivotally connected at the respected first ends to the vehicle frame, with the second ends thereof being pivotally connected to the first and second support axle plates, or the lower arm assembly. A shock unit is associated with a pivot arm assembly of the lower arm assembly at one end, and connected to the vehicle frame at the opposite end.

Abstract: A wheelchair comprises a frame and a chassis. The frame has two side frame members. The side frame members include upper frame members. The upper frame members have first and second mounting positions upon which the chassis may be mounted. The chassis has two mounting brackets. The mounting brackets are selectively attachable to respective upper frame members at the first and second mounting positions. The mounting brackets have lower ends that are structured and configured to rigidly support a rear wheel assembly when the mounting brackets are attached to the upper frame member at the first mounting position to provide a fixed chassis. When the mounting brackets are attached at the second mounting position, the lower end of the mounting brackets pivotally support a swing-arm assembly and suspension member to provide a suspension chassis. The same mounting brackets may be provided to construct each chassis or different mounting brackets may be provided to construct each chassis.

Abstract: A suspension system for mounting a rear wheel on a rigid bicycle frame comprises a rear swing arm assembly pivotally mounted on the main frame member, and a shock absorbing arm assembly having a first end pivotally mounted on the rear swing arm assembly and a second end pivotally mounted on the main frame member. The shock absorbing arm assembly includes a first spring and damper assembly presenting a first spring resistance, and a second spring and damper assembly presenting a second spring resistance having a substantially different magnitude than the first spring resistance. The first and second spring and damper assemblies are mounted in seriatim in the shock absorbing arm assembly in force transmitting relation between the first and second ends of the shock absorbing arm assembly.

Abstract: A wheel chair has a rear swing axle pivotally connected to the seat frame and a spring shock absorber controls the relative movement therebetween. A front suspension is connected to the seat frame separately from the rear suspension and includes a floating beam carrying the front castor wheels and pivotally connected to the seat frame by four link control arms. Three shock absorbers acting between the front of the seat frame and the floating beam allow controlled vertical movement of the floating beam. A second embodiment has the rear wheels each connected by a separate swing arm pivotally connected to the seat frame at their front end and each swing arm also connected to the rear of the seat frame by a pair of control arms and spring shock absorber.

Abstract: A bicycle frame assembly includes a main frame portion having a steering tube at its forward end and a pedal crankset bracket at its rearward end. An intermediate frame portion is pivotably connected to the main frame portion near the steering tube and extends rearwardly therefrom to a seat tube. A rear frame portion includes a pair of upper arm members and a pair of lower arm members connected at distal ends defining a pair of rear wheel drop outs. The upper arm members angle diagonally upwardly and are connected to the intermediate frame portion through a shock absorber. The lower arm members connect through a first link assembly to a main pivot point provided on the main frame portion above and in closely spaced relation to the crankset bracket. The first link assembly extends forwardly and upwardly from the main pivot point and defines another pivot point for connection to a frame member extending downwardly as part of the intermediate frame portion.

Abstract: This invention provides a low mass wheel support means for bicycles and motorcycles which maintains motion of the wheel in a constant plane relative to the support frame, without rigid constraint of the axle, in as much as the axle is free to rotate about its own center and equally transfer the displacement of one axle end to the opposite axle end.

Abstract: A bicycle frame comprises a tapered nose portion having a front sleeve adapted to receive a front wheel-mounting member, a center portion having a tapered upper arm adapted to support a seat and a tapered lower arm having a bottom sleeve adapted to support a bottom bracket/crank assembly, and a tail portion having a rear sleeve adapted to support a rear wheel. The frame may be modular, and some or all of the portions may be of monocoque construction.

Abstract: A bicycle front wheel control mechanism made up of a suspension system and a brake system. The suspension system has an eccentric retainer having an axle and two L-shaped members, and a shaft portion is carried by a housing through an elastic body at a perpendicularly upper part of the axle. The suspension system is so designed that it can rock relative to the front wheel around an axis of the shaft portion with an axial distance between the shaft portion and the axle as its radius, and the brake system is so designed that a side surface of a rim is made wide in a radial direction.

Abstract: A bicycle comprises a wheel-supporting member having an annular sleeve portion, a stub wheel spindle having a journal portion supported for rotation in the sleeve portion by thin wall, large diameter angular contact bearings, a wheel attachment portion extending laterally out of the sleeve in cantilevered relation, and a wheel having a hub received on the wheel attachment portion of the spindle. The wheel attachment portion of the spindle and the wheel hub have mating tapered surfaces so as to provide precise alignment of the wheel and mating splines so as to couple the wheel to the spindle for rotation. The wheel is fastened to the spindle by a split tapered collet and a latch mechanism that holds the collet in place and is releasable by operation of a single member.

Abstract: The rotary axle of the support arm device is adapted to be maintained in position rigidly and in adjustable manner at the free end of the arm and the free end of the arm comprise plane and generally axial bearing surfaces adapted to contact corresponding bearing surfaces directed generally transversally and provided on two rings of a removable bracket piece in order to allow a rigid blocking of this bracket piece on the free end of the arm after adjusting the position and the device is applied when an easy adjusting of the chain tension is required, especially for a rear wheel of a motorcycle.

Abstract: Oscillating supporting device for the driving wheel of a vehicle comprising an arm parallel to the median plane of the wheel and pivotally mounted on the vehicle chassis trough a transverse shaft disposed at one end of the arm, by means of two bearings disposed in such a way that the median plane of the wheel is substantially situated at mi-distance thereof, the wheel being mounted on a rotation axle carried by the arm at its other end, the connecting shaft and rotation axle being parallel to each other, wherein the rotation axle is supported by two other bearings disposed on either side of the wheel, the first of which is integral with the arm and the second of which is carried by a link pivotally mounted on the arm, the internal cage of the second bearing being crossed through by the end of the rotation axle and blocked thereon by a removable fixing nut.

Abstract: An oscillating supporting arm assembly for the driving wheel of a motorcycle, includes an arm mounted to oscillate angularly about a connecting shaft of the motorcycle and cooperating with a suspension assembly between the arm and motorcycle, the wheel being removably fixed to a supporting shaft on one side of the free end of the supporting arm, the supporting shaft extending through the arm on two bearings, a wheel driving pinion is fixed to the supporting shaft, on the side of the arm opposite to the wheel and is driven by a chain mechanically connected to the driving assembly of the motorcycle, the supporting arm having the configuration of a U with two legs between which the rim and the tire of the rear wheel are located, one of the legs having hinge connections which cooperate with the connecting shaft of the motorcycle, the wheel has its median plane extending at substantially equal distances from the two hinge connections of the supporting arm, the wheel is rigidly connected to a brake disc cooperating