10701 results about "Sprocket" patented technology

A sprocket assembly for a bicycle is provides with at least one large sprocket and at least one small sprocket. The large sprocket is modified to allow a bicycle chain to move smoothly from the large sprocket to the small sprocket during an up shift operation. The large sprocket basically has a sprocket body with a first axial side and a second axial side, and a plurality of circumferentially spaced teeth extending radially and outwardly from an outer periphery of the sprocket body. The teeth of the sprocket include a plurality of up shift teeth. The up shift teeth has at least a first up shift tooth, a second up shift tooth located adjacent the first up shift tooth and a third up shift tooth located adjacent the second up shift tooth. The first, second and third up shift teeth are dimensioned to maintain alignment of a bicycle chain to prevent an up shift of the chain when an outer link plate of the bicycle chain meshes with the second up shift tooth, and to permit an up shift the bicycle chain when an inner link plate meshes with the second up shift tooth along a first up shift path.

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. 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. The one-way clutch includes a pair of pawls attached to the inner tubular body and a set of ratchet teeth formed on the inner tubular body. The ratchet teeth are rotated between splines that are formed on the exterior surface of the outer body so as to maximize strength and minimize material. The outer tubular body has a step-shaped configuration with a plurality of abutment stoppers formed on the splines of the largest section such that some of the sprockets are installed from one direction and the other sprockets are installed in a second direction.

An instrument driver comprises opposing rotatable gripping pads. Each of the gripping pads including an outer circular rim and a center hub. The pads are configured for applying a gripping force to an elongated member. The instrument driver further comprises shafts affixed to the center hubs, and a driver assembly configured for rotating at least one of the shafts, thereby causing the pads to rotate in opposite directions to linearly translate the gripped member. Each of the pads further includes a framework for partially collapsing in response to the gripping force, such that portions of the rims flatten to contact each other. Each rim has a concave gripping surface in order to facilitate vertical centering of the member between the pads. Each of the pads further includes a pair of upper and lower sprockets for interlacing with each other to prevent the elongated member from slipping out between the pads.

To improve tracking, an exercise treadmill is provided with a frame including molded plastic pulleys, having an integral gear belt sprocket, an endless belt extending around the pulleys and a motor operatively connected to the rear pulley to drive the belt. The pulleys are molded out of plastic and have a diameter of approximately nine inches. A mold and method for producing large diameter treadmill pulleys having an integrally molded sprocket are also disclosed. A deck underneath the running surface of the belt is supported by resilient members. A positive lateral belt tracking mechanism is used to correct the lateral position of the belt. A belt position sensor mechanism is used in combination with a front pulley pivoting mechanism to maintain the belt in the desired lateral position on the pulleys. The exercise treadmill also includes a lift mechanism with an internally threaded sleeve engaged to vertically aligned nonrotating screws. A user display of foot impact force on the belt is also provided.

A first sprocket is capable of engaging with a chain. The first sprocket has a first sprocket main body, a plurality of teeth disposed along a circumferential direction on the radially outer side of the first sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is greater than the second maximum axial width. The first tooth is formed to be capable of engaging with an outer link plate of the chain. The second tooth is formed to be capable of engaging with an inner link plate of the chain.

The present invention relates to a zero turning radius vehicle having at least one steerable front wheel and a multistage steering input system separately capable of steering the at least one front wheel and selectively driving the drive wheels. A front wheel steering system comprises at least one oblongated sprocket meshingly connected to a steering shaft. An engagement cam system provides the ability to selectively, independently couple the steering wheel to pump arms driving a first and second drive wheel. A steering cam shaft comprises at least one steering cam that acts on at least one bearing. Once the engagement cam system rotates the at least one bearing into place to receive the at least one steering cam, rotation of the steering cam independently alters the speed of one drive wheel in relation to the other drive wheel in response to steering input provided by the operator.

A bicycle sprocket is provided with a metallic sprocket ring part and a non-metallic inner ring part. The metallic sprocket ring part has a crank facing surface, an opposing surface, an inner periphery and an outer periphery with a plurality of sprocket teeth arranged thereon. The sprocket ring part includes at least one connecting portion integrally formed with the sprocket ring part as a one-piece, unitary member. The non-metallic inner ring part at least partially overlaps the inner periphery of the metallic sprocket ring part to at least partially non-movably couple the non-metallic inner ring part to the metallic sprocket ring part with at least one selected portion being absent of the non-metallic inner ring part to allow relative elastic deformation between the metallic sprocket ring part and the non-metallic inner ring in an axial direction

A bicycle sprocket is provided that has a synthetic resin fastening part, to facilitate weight saving and prevent the reduction of fastening power (strength) due to deterioration or deformation of the synthetic resin. The sprocket includes a sprocket ring part and a synthetic resin fastening part. The sprocket ring part includes an inner periphery and an outer periphery with a plurality of sprocket teeth arranged on the outer periphery. The sprocket ring part extends around a central rotation axis. The fastening part is non-movably coupled to the sprocket ring part at a location radially inwardly of the sprocket teeth relative to the rotation axis. The fastening part includes at least one through hole with a metallic tubular member mounted therein and configured to be fixedly coupled to a rotational drive unit of a bicycle. The tubular member has a first fastener contact surface configured to receive a fastening force.

A sprocket assembly that includes at least three sprockets and a sprocket carrier having a plurality of radially extending carrier arms. The carrier arms include a first receiving surface and a second receiving surface opposite the first receiving surface. A first sprocket mounted to the first receiving surface and a second sprocket mounted to the second receiving surface. A third sprocket arranged between the first and second sprockets.

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.

Apparatus and methods for use in measurement of applied load at a chainring assemblage of a pedal powered device are provided. The apparatus includes a link adapted for interposition between a chainring attachment site located on a conventional chainring mount, or spider, and a corresponding chainring attachment locale at a conventional chainring. The link has a geometry and/or material composition selected to accommodate measurement of load exhibited between the attachment site and the corresponding chainring attachment locale. Means for measuring the load exhibited thereby is associated with the link.

A family of new bicycle shifting systems incorporate improved derailleur designs that are controlled by sealed hydraulic actuators. The shifting systems (i) a hydraulically-actuated, manually-powered front and rear derailleur shifting system, (ii) a hydraulically-actuated, power-assisted front and rear derailleur shifting system with manual control, and (iii) a hydraulically-actuated, power-assisted front and rear derailleur shifting system in which the shifting sequence for the rear derailleur is controlled automatically by pedal speed. Each of these shifting systems utilize a totally sealed, inclined linear shifting path. Environmental contaminants are prevented from entering any of the critical derailleur or control elements. The linear, inclined shifting path provides precise chain shifting, more uniform chain wrap on the rear bicycle drive sprockets, and lower chain and sprocket wear. Several different shifting control units are disclosed.

A bicycle sprocket is provided that has a sprocket ring part, a synthetic resin fastening part and at least one attachment part. The synthetic resin fastening part is non-movably coupled to the sprocket ring part at a location radially inwardly of the sprocket teeth relative to the rotation axis. The least one attachment part is at least partially embedded within the synthetic resin fastening part. The attachment part includes a connecting portion and a radial projecting portion extending outwardly from the connecting portion to space the connecting portion radially inward of the sprocket ring part. The attachment part is formed as a separate member from the sprocket ring part and the synthetic resin fastening part. The synthetic resin fastening part facilitates weight saving, while the attachment part prevents the reduction of fastening power (strength) due to deterioration or deformation of the synthetic resin.

A bicycle sprocket basically has a metallic sprocket ring part and a synthetic resin fastening part that is configured to ensure that weight can be reduced and that loss of fastening force resulting from deterioration or deformation of the synthetic resin can be prevented. The metallic sprocket ring part includes a ring element with a plurality of sprocket teeth located on an outer periphery of the ring element, a plurality of connecting elements located on an inner periphery of the ring element and a plurality of internal fastening elements located on radial inner ends of the connecting elements, respectively. The synthetic resin fastening part is non-movably formed on both axial faces of the sprocket ring part at a location radially inwardly of the sprocket teeth so as to cover at least a portion of the inner periphery of the ring element, the connecting elements, and the internal fastening elements.

A bicycle transmission control apparatus comprises a control unit that provides a first signal to operate a first derailleur a gear shift distance from a first origin sprocket to a first destination sprocket. The control unit receives a condition signal that indicates a condition resulting from at least one of the first derailleur and a second derailleur; and an adjustment controller moves the first derailleur an adjustment distance less than the gear shift distance in response to the condition signal.

A front derailleur for a bicycle is provided to move or shift a chain between two or more sprockets for changing gears. The front derailleur can be connected to the shift cable such that the shift cable is pulled upwardly or downwardly relative to the bicycle frame. The front derailleur has a fixed member adapted to be coupled to a portion of the bicycle, a chain guide for shiffing the chain of the bicycle and a linkage assembly coupled between the fixed member and the chain guide. The chain guide is located above the fixed member and a coil spring is used to bias the chain guide from an extended position to a retracted position. A detachable guide member is removably coupled to the linkage assembly for guiding the shift cable downwardly relative to the bicycle frame. If the detachable guide member is removed, then the shift cable is pulled upwardly relative to the bicycle frame.

A driver for mounting a multiple sprocket arrangement to a bicycle rear axle arrangement. The multiple sprocket arrangement includes a sprocket assembly having a plurality of sprockets with different numbers of teeth and an adapter. The rear axle arrangement includes a hub. The driver includes an input torque transmitting profile for transmitting torque from between the sprocket assembly and the driver. A positioning section positions the sprocket assembly in the radial direction. External thread threadably receives the adapter and is disposed between the input torque transmitting profile and the positioning section. An output torque transmitting arrangement transmits torque between the driver and the hub.

Drive assemblies for electric devices, such as vehicles, include an electric motor that includes a rotor assembly and a stator assembly positioned within the rotor assembly. The stator assembly is fixed to a stationary axle and includes a pole and a coil around the pole. The rotor assembly includes a housing to which a plurality of magnets are attached. The rotor assembly is supported on the stationary axle by bearings. A drive mechanism, such as a sprocket, pulley or gear is provided on the housing of the rotor assembly and rotates with the housing. In various embodiments, the stationary axle includes an internal bore for receiving coolant, a longitudinal rib within the internal bore, and longitudinal channels in its outer surface.

A bicycle sprocket assembly includes a first sprocket, a second sprocket and at least one reinforcement member. The first sprocket includes a first main body and a first chain engagement portion. The second sprocket includes a second main body and a second chain engagement portion. The reinforcement member is coupled between the sprockets. Preferably, the reinforcement member is disposed in first and second apertures of the first and second sprockets at a radial location spaced radially outwardly of first and second inner end portions of the first and second sprockets. Preferably, a spacer is disposed between the first and second sprockets radially inwardly of the reinforcement member. The reinforcement member is preferably installable in the first and second apertures by a sliding movement generally perpendicular to a rotation axis of the first and second sprockets.

A bicycle chainwheel assembly that includes at least one smaller chainwheel and at least one larger chainwheel, the chainwheels engageable by a chain. The larger chainwheel includes a first tooth and a second tooth disposed adjacent the first tooth opposite a drive rotation direction. The first tooth and the second tooth have a configuration that improves the shifting of a chain from a smaller chainwheel to the larger chainwheel. The first tooth has a lateral recess and the second tooth has a deflection chamfer. The second tooth may also have a recess. The first and second teeth have a configuration that prevents the first and second teeth from capturing the chain. An inner link plate of the chain includes a chamfer disposed on an outer side surface in a central region of the plate.

The permanent magnetic double crawler robot for washing hull surface has permanent magnets fixed onto its double crawler for adsorption onto hull surface and a remote control device to realize the overwater and underwater crawling and hull cleaning operation. The permanent magnetic double crawler robot is different from available hull surface cleaning machine (robot) in that it has adsorption and walking functions originated from the double crawler comprising driving chain wheel pair and permanent magnetic adsorption unit. The permanent magnetic double crawler robot is different from available wall-crawling crawler robot in that it has specific structure with two row of chain wheel pairs in each crawler resulting in improved smoothness and no crawler breaking fault and permanent magnetic adsorption unit suitable for hull surface operation. In addition, the robot is provided with three telescopic brush assemblies, etc. suitable for underwater operation.

A kinetic energy recovery system (“KERS system”) and motorcycle equipped with the same is disclosed. The KERS system may be mechanical, hydraulic, or a combination thereof. In an embodiment, motorcycle includes a rear wheel, an electric motor, a motor shaft, and a front wheel equipped with a wheel hub that includes a sprag clutch. The motor shaft can be fitted with a motor drive sprocket that drives a jackshaft chain that in turn drives a jackshaft input sprocket that is fitted to the jackshaft. Jackshaft input sprocket may be installed in conjunction with a sprag clutch that allows the rear wheel to free wheel during coasting while the front wheel KERS system is engaged. The motor harvests kinetic energy from the front wheel without simultaneously powering the rear wheel while the use of a geared dead zone allows the front and rear wheels to not lock together to improve safety.

A snow cycle includes a conventional motorcycle chassis having a set of steerable front forks and a rear swing arm, which normally mount front and rear wheels of the cycle, respectively. A snow track module is mounted to the rear swing arm and has an endless track driven by a cog connected to a drive sprocket of the engine by a single chain. At least one and preferably a pair of skis are mounted off the front forks and are pivotable fore and aft as well as tiltable to either side to maintain the ski flat to the ground when the vehicle is tilted to one side or the other when making an aggressive turn.

A drive unit (16) for an aircraft running gear (2) having at least a first wheel (4) and a second wheel (6) on a common wheel axis (A), wherein the drive unit (16) is drivingly coupleable to at least one of the first and second wheels (4, 6), is characterized in that the drive unit (16) comprises at least one power output assembly (122, 124) for driving at least one of the first and second wheels (4, 6), with each of the at least one power output assembly (122, 124) comprising a power transmission chain (136) selectively engageable with a sprocket element (108, 110) coupled to one of the first and second wheels (4, 6).

Embodiments of the present invention relate to methods of forming powder metals materials and parts. More specifically, certain embodiments of the present invention relate to methods of forming powder metals materials and parts by densifying at least a portion of a surface of the materials and/or parts after sintering and prior to densifying one or more core regions of the materials and/or parts. Other embodiment provide powder metal parts, such as gears and sprockets, having surface regions that are uniformly densified to full density to depth ranging from 0.001 inches to 0.040 inches, and core regions that can have at least 92 percent theoretical density and further can have essentially full density, or full density. Still other embodiments relate to brazed, welded, plated and gas-tight powder metal parts and components that can be made in accordance with the various non-limiting methods disclosed herein.

A sprocket assembly for a bicycle includes a sprocket body formed by a plurality of sprocket rings, and a collar mounted in the sprocket body. The sprocket body has a first side provided with a fitting portion and a second side provided with a mounting tube. The collar is received in the fitting portion of the sprocket body. The sprocket rings have different inner diameters so that the sprocket rings are arranged to have a stepped inner periphery, and have different outer diameters so that the sprocket rings are arranged to have a stepped outer periphery. Thus, the collar is separated from the sprocket body and is made independently so that the collar can be worked easily and quickly to fit shafts of different specifications and sizes and to fit the sprocket body of different specifications and sizes.

A vehicle door articulating and sliding mechanism is provided that includes a swing arm pivotally mounted via a first bracket to a vehicle structure at one end and a sliding assembly comprising a rotating second bracket mounted at an opposite end of the swing arm. The sliding assembly is slidably engaged to a vehicle door. The mechanism also includes a first flexible link at least partially encircling a first sprocket connected to the vehicle structure and a second sprocket fixed to the vehicle door. The mechanism further includes a second flexible link fixed to the vehicle door at one end and fixed to the vehicle structure at the opposite end. The second flexible link at least partially encircles a cam, wherein the first flexible link and cam provide a catch that engages the cam to accelerate movement of the door during opening.

A power steering system is provided for assisting with steering the wheels of a motor vehicle and includes two or more electrical motors that are selectively energized by an electronic control unit. The motors may be drivingly connected to the steering wheel shaft, or drivingly connected to the steering wheel pinion that meshes with the steering rack, or be drivingly connected to the steering rack. The motors may be drivingly connected through various transmission arrangements in including gears, ball nuts, belt and pulleys, or chain and sprockets, speed reduction gears and clutches. The electronic control unit can selectively control the motors to run all at once, or to run individually, as desired.

The invention relates to the field of road traffic management, and provides an automatic retractable equipment for traffic cones, which mainly comprises a suspension device and a retractable device, wherein the suspension device comprises a first fixed rod and a second fixed rod, wherein a supporting rod is fixed on the second fixed rod, and the retractable device comprises a base, a first rotating shaft, a second rotating shaft, a sprocket, a drive sprocket, a chain, a motor, a sprocket cover, a sliding board, shaft seats, rolling pull rods, a retaining arm structure and a positioning device; one end of the base is obliquely hung on the first fixed rod, and the bottom of the first fixed rod is fixedly connected with the supporting rod; the first rotating shaft and the second rotating shaft are erected at the two ends of the base through the shaft seats, and the two ends of the first rotating shaft and the second rotating shaft are respectively provided with sprockets; the sprockets arranged at the same end are connected by a chain, and the plurality of rolling pull rods are arranged between the two chains in parallel; and the sliding board is connected with the sprocket cover through hinges. The equipment has the function of automatically retracting the traffic cones, simple structure, convenient operation and high performance-price ratio.

The invention discloses a universal joint-driven inclined wide-and-narrow separating-planting mechanism of a rice transplanter. Transmission cases of the same structure and planting arms of the same structure are arranged on the two sides of a chain wheel shaft respectively; the chain wheel shaft forms an inclination angle with an output shaft of a universal joint through the universal joint; the output shaft end of the universal joint is fixedly connected with a planet carrier; in the planet carrier, central gears are supported on the output shaft of the universal joint through bearings, are fixedly connected through flanges, adjustment gaskets and the flange on a transmission case body at the universal joint end and are connected with planet gears per se through idler wheels respectively; and planet gear shafts fixedly connected with the planet gears are connected with the planting arms per se respectively. In the universal joint-driven inclined wide-and-narrow separating-planting mechanism, seedling needles on the planting arms driven by the planet gears move in a plane inclined relative to the chain wheel shaft, the inclination of the planet carrier produces lateral movement relative to an advancing direction to move seedling inserting points leftwards or rightwards relative to seedling taking positions after the seedling needles take seedlings, and then rice transplantation positions are distributed in narrow and wide rows at unequal row spaces meeting agronomic requirements on the premise that seedling taking openings are distributed at equal intervals.