Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7258638 | Sprocket of a chain transmission for a bicycle A sprocket of a chain transmission for a bicycle is described, intended to be coupled with a further sprocket with a smaller diameter in a group of sprockets integral in rotation. The sprocket comprises a plurality of teeth which follow each other on the sprocket se... | 08/21/2007 |
| 7044876 | Bicycle sprocket having lateral protrusions for use in a multiple sprocket assembly A sprocket is adapted to be mounted to a sprocket support that rotates around an axle. The sprocket comprises a sprocket body having a side surface and an inner peripheral surface defining a sprocket-mounting opening, wherein at least one portion of the inner periph... | 05/16/2006 |
| 6666786 | Chamfered sprocket assembly A chamfered sprocket assembly for facilitating the shifting of a drive chain from a larger sprocket to a smaller sprocket is disclosed. In a preferred embodiment, the chamfered sprocket assembly includes a sprocket having a plurality of chamfered portions... | 12/23/2003 |
| 6599210 | Sprocket A sprocket has a mounting part for mounting on a wheel and a corrugated section provided with teeth for engagement with a chain such that the sprocket has a reduces volume and weight and allows for appropriate engagement with the chain by having the posit... | 07/29/2003 |
| 6468173 | Sprocket assembly for silent timing chain system A sprocket assembly for an automotive timing chain system includes a main sprocket, an auxiliary sprocket mounted onto one side of the main sprocket for assisting the main sprocket, and an elastic member elastically coupling the auxiliary sprocket to the ... | 10/22/2002 |
| 6361461 | Multiple-speed chain driving device A multiple-speed chain driving device includes a shaft, a rotors'assembly, a chain driving sprocket, and a shifting assembly. The rotors'assembly is mounted on the shaft and includes three rotors which are vertically mounted on each other and enclosed wit... | 03/26/2002 |
| 6293884 | Cluster sprockets for bicycle transmissions and other prime movers This invention comprises a multi-sprocket or cluster gear assembly with a plurality of progressively sized sprockets or gears that are positioned adjacent to each other so as to define an increasing diameter sprocket assembly. Each sprocket comprises a no... | 09/25/2001 |
| 6190276 | Chain scraping conveyor-drive shaft for coal mining The invention relates to a multipart drive shaft of a chain drive for chain scraping conveyors for heavy-duty sprags in coal mining, consisting of a main shaft with unilateral or bilateral internal gearing for receiving externally geared stub shafts for t... | 02/20/2001 |
| 6139456 | Bicycle sprocket A bicycle sprocket includes a number of annularly equidistant teeth formed on an outer periphery thereof, the teeth on the sprocket being diametrically symmetrically formed. The sprocket includes two diametrically disposed easy-to-engage teeth. The sprock... | 10/31/2000 |
| 6045472 | Integrated up-and downshifting configuration of a multistage sprocket assembly for a bicycle A multistage sprocket assembly for a bicycle comprises at least one larger sprocket and at least one smaller sprocket, in which both side surfaces of the larger sprocket are trimmed off at the positions corresponding to two downshifting paths and two upsh... | 04/04/2000 |
| 5954604 | Multiple sprocket assembly for a bicycle A plurality of sprockets are coaxially mounted together, wherein a spacing between each pair of adjacent sprockets is less than a thickness of at least one of the plurality of sprockets. In another embodiment of the invention, a plurality of sprockets are... | 09/21/1999 |
| 5890980 | Toothed belt drive gear for a motor vehicle wheel A toothed belt drive gear (1) for a motor vehicle wheel, especially a pulley wheel for a motorcycle, is connected rotation-fast with the hub of a drive gear and has an outer rotating toothed ring (5). In order to facilitate the maintenance and care of the... | 04/06/1999 |
| 5860882 | Process for manufacturing phased sprocket assemblies by capacitor discharge welding A process for manufacturing multi-tiered and/or phased sprocket assemblies using capacitor discharge welding is provided.... | 01/19/1999 |
| 5759124 | Multistage sprocket used in a bicycle rear derailleur system A multistage sprocket assembly for a bicycle with at least one large sprocket and one small sprocket disposed adjacent to each other and assembled in a relationship such that the distance between the escape point between a pair of adjacent teeth at the la... | 06/02/1998 |
| 5738603 | Derailleur Derailleur with at least two sprockets on a sprocket set which is located around a pedal axle of a bicycle, which sprockets are provided with chain transfer assistance measures to assist the transfer of the chain in upshifting or downshifting, whereby the... | 04/14/1998 |
| 5690570 | Multistage sprocket assembly for a bicycle A sprocket assembly includes a larger diameter sprocket having a plurality of teeth formed on an outer periphery thereof, and a smaller diameter sprocket having a plurality of teeth formed on an outer periphery thereof. A driving chain meshes with the plu... | 11/25/1997 |
| 5667450 | Drive sprocket device A saw chain of a chain saw is driven by a drive sprocket assembly including a drive sprocket and a pair of separate drive rings arranged coaxially and rotatably on the drive sprocket. Drive links of the saw chain extend through an annular space formed bet... | 09/16/1997 |
| 5606801 | Drive sprocket device with flanges A drive sprocket arrangement includes a drive sprocket and a drive ring rolling loosely on the outer periphery of the sprocket. Drive links of the saw chain enter recesses in the sprocket via orifices in the drive ring. The drive ring has at an axial inne... | 03/04/1997 |
| 5589135 | Height adjustable stand for laboratory equipment A height adjustable stand for laboratory equipment, in particular for rotary evaporators, possesses a holder arrangement (6). The holder arrangement is able to be displaced vertically on a stand post (5). By way of a motor driven lifting arrangement (9, 1... | 12/31/1996 |
| 5199552 | Endless belt conveyor Endless belt conveyor in which the belt is stretched between two pulleys or drums one of which is a drive pulley provided, at least at one of its ends, with belt guiding devices consisting of a circular row of studs fitting into holes punched on the belt ... | 04/06/1993 |
| 5010973 | Freight carrier A three-wheeled freight-carrying vehicle has a platform section with coaxial driving wheels, and a power section at the opposite end driving a steerable single wheel. An operator's platform is provided at the side of the single wheel. The single wheel and... | 04/30/1991 |
| 4813916 | Sprocket having teeth of improved shape and a cycle free-wheel including said sprocket Each of the teeth (5) of the sprocket has a Y-shaped top (10) in a view developed along the circumference of the sprocket (5). The principal branch (10a) of the Y extends along the direction (11) of rotation of the sprocket and is located in the central p... | 03/21/1989 |
| 4798565 | Chain wheel assembly A lost motion chain wheel assembly to prevent brake lock up in a bicycle having a pedal crank shaft operated brake, has a chain wheel center or spider fast to a pedal crank and providing an annular channel receiving the inner periphery of an annular chain... | 01/17/1989 |
| 4738652 | Belt drive, for example for thread-feeding devices of textile machines A belt drive includes a driven shaft and two belt pulleys supported on the shaft for guiding toothed belts. Each belt has a toothed portion and a smooth untoothed portion. Each pulley is a multi-part element and includes a first portion having a toothed c... | 04/19/1988 |
| 4642075 | Multiple sprocket wheel A multiple sprocket wheel used as a unit in a two-wheeled vehicle and for a multi-speed gear without involving separation of a chain guard from a plurality of sprockets.... | 02/10/1987 |
| 4538516 | Torque-assist system for printing belts A printing belt extends around a rotatable cylinder having independently rotatable belt drive sprockets at the opposite ends thereof. A torque-assist drive connected with the cylinder is selectively operable for imparting supplemental traction to the belt... | 09/03/1985 |
| 4406645 | Sprocket-brake drum construction for chain saw A drive assembly for a chain saw (10) having a brake (42) wherein lugs (102) formed integrally on the brake drum (78) are mechanically connected within opening (72) of adjacent pairs of teeth (70) on the sprocket (22) which drives the saw chain (18) so th... | 09/27/1983 |
| 4353705 | Sprocket and clutch drum assembly An improved drive assembly for a powered chain saw or the like, which drive assembly includes a drive sprocket having a hub portion centrally and presenting a hub extension at one end for coaxially registering within the centered opening of the end wall o... | 10/12/1982 |
| 4299318 | Unit hub for bicycles A unit hub for a bicycle, comprising a hub combined with a freewheel. A cylindrical member is screwed to the hub body and is provided at one of its axially outside ends with an extension radially extending and having ball races carrying balls for supporti... | 11/10/1981 |
| 4182194 | Free wheel hub with coaster brake A multi-speed free wheel hub with a coaster brake for use in a bicycle comprising a driving mechanism for driving the bicycle and a braking mechanism for braking the bicycle. Both the driving and braking mechanisms are independent of each other when one p... | 01/08/1980 |
| 4170369 | Bicycle wheel suspension, driving and braking assembly Bicycle wheels are mounted on single suspension struts, each having an axle secured horizontally. Adjacent to the strut is an independently rotatable assembly. For the rear wheel, the assembly includes an overrunning clutch having its outer driven portion... | 10/09/1979 |
| 4150859 | Chain wheel and crank for a bicycle A bicycle chain wheel and crank of three pieces, namely a crank shaft and a pair of crank arms. The crank shaft freely rotatably supports the chain wheel through a cone, so that the crank is easy and inexpensive to manufacture. The crank arms can be of co... | 04/24/1979 |
| 3991818 | Regenerator cylindrical viscous damper drive assembly A cylindrical viscous damper drive assembly for driving the matrix of a rotary regenerator heat exchange apparatus, the drive assembly including an annular ring-like driven sprocket loosely encircling the annular hub at one end of a drive shaft coupled to... | 11/16/1976 |
| 3962929 | Drive sprocket for chain saw A washer like metal blank formed into flutes. Each flute is shaped to receive the drive tangs of a saw chain so that successive drive tangs are alternately received in the flutes of first one side and then the other. The central opening is provided with k... | 06/15/1976 |
| 3958680 | Motor chain saw with plural clutches and a brake A motor chain saw with a driving sprocket wheel adapted to be driven by a motor through the intervention of a centrifugal clutch, or the like. A safety clutch is arranged in the driving connection between the motor shaft and the driving sprocket and disen... | 05/25/1976 |
