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9033835 Sprocket  
The invention relates to a multipart sprocket (1), in which an inner ring (2) for fixing the multipart sprocket (1) to a wheel hub comprises through-holes (5) which are located on a common hole...
9037368 Method for electronically controlling a bicycle gearshift and electronically servo-assisted bicycle gearshift  
A method for electronically controlling a bicycle gearshift comprising at least one derailleur is disclosed, comprising the sequential steps of: a) imparting a movement on the derailleur of the...
9009963 Method for joining structural elements onto a shaft  
A method for joining structural elements onto a shaft may include generating at least one projection at a respective joining position on the shaft, sliding at least one of the structural elements...
8986144 Power transmission device  
A power transmission device is used to distribute torque from a power source to an external device and an auxiliary device. The power transmission device is comprised of a first bearing and a...
8979688 Cushioning structure for a sprocket  
ISSUE To reduce operating noise and further improve durability in a cushioning structure for a sprocket used in a roller chain or bush chain. MEANS OF RESOLUTION Annular first and second cushion...
8894523 Chainwheel for multi-size crank modules  
A chainwheel has a chainwheel body, a first combining hole set and a second combining hole set. The chainwheel body has a center point. The first combining hole set has multiple first combining...
8888630 Oil pump driving mechanism  
When an engaging pawl 23b is fitted into a recessed portion 34b of a first sprocket 34, which is linked by a chain 33 to a second sprocket 32 that drives an oil pump 3 disposed at a radial...
8864612 Cam sprocket and method for manufacturing the same  
A cam sprocket according to the present invention includes a ring-shaped plate portion having external teeth along its outer circumference; a circular plate portion that is disposed at the...
8840127 Spiral cone pulley reciprocal pedal drive system and methods  
A pedal drive system for a bicycle includes a front spiral cone pulley and a rear pulley. The front spiral cone pulley is attached to a crank arm, and the rear pulley is attached to a rear wheel...
8821327 Engine accessory mount for improved stretch belt installation  
An engine includes an engine structure defining a plurality of cylinders. A crankshaft is rotatably mounted to the engine structure and a plurality of pistons are each disposed in a corresponding...
8776491 Lifting engagement chain unit  
There is provided a lifting engagement chain unit that autonomously erects a pair of engagement chains, ensures engagement accuracy between link plates and improves buckling strength. A plurality...
8766507 Motor pulley  
A motor pulley minimizes an influence of a resonance phenomenon, thereby reducing noise and vibrations and preventing lowering of durability.
8708849 Inverted tooth chain sprocket with frequency modulated meshing features  
A sprocket for an inside flank engagement inverted tooth chain includes tooth spaces each defined at least partially by the engaging flank of one tooth, the disengaging flank of another tooth, and...
8628440 Inverted tooth chain and sprocket drive system with reduced meshing impact  
An inverted tooth chain drive system defines a meshing contact angle Tau (τ) between the tangent line TL and an initial contact reference line that passes through a controlling pin center and the...
8574108 Sprockets made of two materials with half holes on the edge of central portion  
The present sprocket wheel invention enhances the efficiency of the sprockets made of two materials, e.g., a lighter material at central portion of the sprocket and a hard material at peripheral...
8517874 Low-noise chainwheel  
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...
8454461 Motion transmission system of a bicycle  
A sprocket assembly mounted to a hub has at least eleven sprockets. The hub is able to rotate about a rotation axis and has a plurality of spoke attachment seats and a fastening portion to a frame...
8435145 Randomized chain sprocket and method for making a sprocket  
A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.
8430775 Multiple tension reducing sprockets in a chain and sprocket system  
In chain and sprocket systems with at least two resonance modes, two or more tension reducing sprockets are oriented to cancel each other at a first resonance mode and have no effect to increase...
8353796 Sprocket with alternating pitch spacing  
The present invention relates to a sprocket (1) with a circular gear ring (3) comprising a plurality of alternating teeth (4) and tooth spaces (5) with different pitch spacings (T) distributed...
8328671 Randomized chain sprocket and method for making a sprocket  
A randomized chain sprocket has a set of four tooth gaps having three different tooth gap radial locations, two different link angles, and a chain with constant link pitch.
8328670 Engagement chain  
An engagement chain in which a buckling strength of a pair of engagement chains engaged with each other is improved without blocking engagement operations between inner tooth plates and between...
8267818 Snap together split sprocket  
Described herein is a sprocket for interfacing with a perforated material, such as a chain. The sprocket includes a hub and a material-interfacing plate. The hub is shaped to fit around an axially...
8226511 Bicycle sprocket tooth with a shift assist radius greater than a reference tooth radius  
A bicycle sprocket comprises a sprocket body having a first side surface and a second side surface, a plurality of sprocket teeth extending radially outwardly from a root portion of the sprocket...
8216102 Roller door drive adapter method and apparatus  
A sprocket having a slot formed therethrough can be disposed about the non-rotating support rod of a given roller door. This sprocket is then attached to the door-supporting frame such that the...
8157246 Deflecting roller with increased chain utilization  
A deflecting roller for link chains, for example, round link chains or profiled steel chains, presents, on the periphery, chain pockets for lying chain links. Furthermore, chain pockets for...
8136827 Belt drive system  
A self aligning belt drive system comprises a belt drive having a plurality of longitudinally spaced inner lobes each having an alignment groove. The system further comprises at least one pulley...
8118699 Sprocket for chain  
A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller...
8096528 Chain sprocket with increased load capacity  
A chain sprocket for link chains, for example, round link chains or profiled steel chains, has chain pockets for horizontal chain links. Chain pockets for vertical chain links are also provided....
8083624 Roller chain sprocket having an improved tooth form and metal cushion rings  
A cushion ring sprocket assembly and chain drive system are designed to prevent roller-to-root radial contact. Hard contact between the chain link plates and the cushion rings, and corresponding...
8066602 Tension-reducing random sprocket  
A sprocket is provided having a plurality of teeth around its circumference. Adjacent teeth are separated by roots each having a root radius defined as the distance between the center of the...
8057338 Bicycle sprocket apparatus with reinforcement between sprockets  
A bicycle sprocket apparatus comprises a sprocket support, a first sprocket coupled to the sprocket support at a plurality of circumferentially spaced first sprocket mounting locations, a second...
8057337 Debris ejecting sprocket and system  
A debris ejecting sprocket comprising a body (100), a plurality of teeth (101) projecting from the body, a plurality of grooves (102) in alternating arrangement with the teeth, each groove...
8047938 Transmission device of walking type self-traveling lawn mower  
A transmission device (1) of a walking type self-traveling lawn mower (4) in which the reliable transmission of a rotating power is achieved as in the case of a shaft drive system by solving the...
7998007 Phasing of chains, sprockets, and gears to provide enhanced noise vibration and harshness reduction  
A method for reducing NVH in a vehicle having the steps of providing at least one repeating event, replicating at least one component, and delaying at least one equivalent part. The repeating...
7967131 Low friction, direct drive conveyor with a raked tooth drive  
An endless conveyor belt has teeth with drive faces raked away from the direction of travel. The belt can be driven by a drive pulley having sheaves with drive faces raked toward the direction of...
7959529 Bicycle multi-gear cassette  
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...
7942771 Bicycle sprocket apparatus with a shift inhibiting structure  
A bicycle sprocket apparatus comprises a larger diameter sprocket and a smaller diameter sprocket, wherein the larger diameter sprocket has on its outer periphery a plurality of sprocket teeth,...
7931553 Bicycle sprocket apparatus with a chain support structure  
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...
7914408 Multiple-cushion ring sprocket assembly  
A cushion ring sprocket assembly includes a sprocket body with a plurality of teeth arranged in a row. The sprocket body includes first and second opposite axial tooth faces and first and second...
7883437 Sprocket  
A sprocket for transferring a force between a chain and a drive element that includes a plurality of teeth and a plurality of openings proximate the teeth. Each tooth has a load-bearing flank and...
7871347 Bicycle rear sprocket assembly  
A bicycle rear sprocket assembly has a sprocket carrier, a first sprocket, a second sprocket and a third sprocket. The first and second sprockets are attached to opposite axial sides of the outer...
7862460 Chain noise damping device  
A sprocket (S) for a chain driven power transmission system used on an internal combustion engine. Severe ITVH (Noise, Vibration, Harshness) characteristics associated with a chain engaging the...
7854673 Bicycle sprocket assembly having a reinforcement member coupled between sprockets  
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....
7850564 Bicycle sprocket  
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...
7850563 Power transmission mechanism and manipulator  
A power transmission mechanism comprising: a flexible power transmission element; a pair of a drive pulley and a driven pulley on which the flexible power transmission element is wound, each the...
7850562 Low friction, direct drive conveyor belt  
A thermoplastic endless belt (100) has a smooth outer surface substantially free of discontinuities and an inner surface with a plurality of teeth (106) at a given belt pitch. The teeth are...
7846047 Bicycle sprocket having a thickened spline  
A sprocket comprises a sprocket body; a plurality of teeth extending radially outwardly from the sprocket body and dimensioned to engage a bicycle chain; and a spline extending radially inwardly...
7841463 Low friction, direct drive conveyor with a raked tooth drive  
A conveyor includes an endless belt having teeth with drive faces raked away from the direction of travel. The conveyor also includes a drive pulley having sheaves with drive faces raked toward...
7824287 Bicycle sprocket  
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...

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