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| Number | Title | Issue Date |
| 8079288 | Bicycle gear crank A bicycle gear crank that allows easy and proper circumferential position adjustment of the gear plate with respect to the crank arm. The bicycle gear crank includes a crank arm having a base end provided with a boss for mounting to a crank shaft an annular intermed... | 12/20/2011 |
| 7980156 | Multipurpose transmission mechanism for bicycle with quick assembly device A transmission mechanism is used in a bicycle having a frame. The transmission mechanism includes a quick assembly device including a central shaft, threaded collars, and a clip bracket, which is adapted to mount to a lower frame portion of the bicycle frame and a m... | 07/19/2011 |
| 7360470 | Bicycle crank and associated methods A bicycle crank comprises a mixture of aluminum and chromoly. The spine comprises chromoly, which serves as a backbone to the crank arm and thereby provides added strength. The body comprises aluminum, which reduces the crank arm weight. The body can therefore be th... | 04/22/2008 |
| 7334500 | Pedal crank having solid coupling A pedal crank includes a crank arm having a hole formed in one end to receive one end of a crank shaft which may be rotatably attached to a bicycle frame. An expanding device may be engaged in the end of the crank shaft for expanding the crank shaft to engage with t... | 02/26/2008 |
| 7267030 | Bicycle crank assembly A bicycle sprocket crank assembly is comprised of first and second crank arms joined to a spindle. One of the crank arms and the spindle may be fabricated as a unitary structure, or both cranks arms may be formed as separate structures and joined together. In either... | 09/11/2007 |
| 7267635 | Stationary bike A stationary exercise bicycle is provided having a frame, a resistance member, a drive assembly, a right pedal, a left pedal, a seat and an adjustable seat mechanism utilizing a rack. Assembly and disassembly of a three piece crank arm assembly is accomplished witho... | 09/11/2007 |
| 7258041 | Bicycle crank assembly A bicycle crank assembly has a right crank crimp-fastened to a crank shaft in such a manner that the external appearance is attractive. The crank shaft has a first and second portions with the second portion being positioned on the right side of the first portion an... | 08/21/2007 |
| 7240585 | Drive mechanism for a bicycle transmission assist mechanism A drive mechanism for a bicycle transmission assist mechanism includes a crank arm having a drive member. The drive member includes a first abutment facing a forward rotational direction of the crank arm and a non-concave sloped surface facing a rearward rotational ... | 07/10/2007 |
| 7240586 | Auxiliary power unit starting apparatus for an electric bicycle The present invention relates to an auxiliary power unit starting apparatus for an electric bicycle, which can convert the rider's pedaling force into mechanical displacement at the time the bicycle is being pedaled, and then the mechanical displacement can start th... | 07/10/2007 |
| 7234373 | Bicycle crank axle with a radial projection A bicycle crank arm apparatus includes an axle having a first end portion and a second end portion, wherein the first end portion has an outer peripheral surface and a threaded inner peripheral surface; an axle bolt having a threaded outer peripheral surface screwed... | 06/26/2007 |
| 7201390 | Scooter operated manually or automatically A scooter includes a main body, a rear wheel mounted on a rear end of the main body, and an operation mechanism mounted on the main body and connected to the rear wheel to move the rear wheel. When in use, the rider steps on the two pedals to move the scooter forwar... | 04/10/2007 |
| 7073996 | Two-piece crank hanger set for bicycles A two-piece crank hanger set including a left crank arm having a tubular crank spindle attached thereto and a right crank arm having at least one chain sprocket wheel attached thereto. The crank spindle extends through a bicycle crank tube. Bearing cups are removabl... | 07/11/2006 |
| 7007570 | Pedal crank mechanism for bicycle A bicycle crank mechanism comprises a main crank, a follower crank, and a connecting lever disposed between free ends of the main and follower cranks. A second fixed fulcrum shaft of the follower crank is arranged obliquely upwardly and backwardly of a first fixed f... | 03/07/2006 |
| 6948730 | Bicycle with speed change gear A speed change gear shaft for a bicycle having an internal speed change gear. The speed change gear is of the internal multistage type, and a speed change gear shaft is provided separately from a crankshaft of the bicycle. A swing arm on which a rear wheel is suppor... | 09/27/2005 |
| 6938516 | Bicycle crank axle bolt A bicycle crank arm apparatus includes an axle having a first end portion and a second end portion, wherein the first end portion has an outer peripheral surface and a threaded inner peripheral surface; an axle bolt having a threaded outer peripheral surface screwed... | 09/06/2005 |
| 6925907 | Triangulated bicycle pedal support structure A bicycle with a triangulated crank structure replaces the single span crank arm which connects the spindle to the foot pedal on bicycles today. The triangulated crank structure is typically comprised of several sections including two linear spans of structural mate... | 08/09/2005 |
| 6860171 | Drive mechanism for a bicycle transmission assist mechanism A drive mechanism for a bicycle transmission assist mechanism includes a crank arm having a drive member. The drive member includes a first abutment facing a forward rotational direction of the crank arm and a non-concave sloped surface facing a rearward rotational ... | 03/01/2005 |
| 6845687 | Bicycle crank arm A bicycle crank arm apparatus includes an axle having a first end portion and a second end portion, wherein the first end portion has an outer peripheral surface and a threaded inner peripheral surface; an axle bolt having a threaded outer peripheral surface screwed... | 01/25/2005 |
| 6840136 | Pedal drive mechanism A pedal drive mechanism that provides continuous, uninterrupted torque to the drive chain or belt. The continuous torque effect is a result of establishing two separate but connectively joined axes of rotation that transmit pedal crank force to the drive chain (5... | 01/11/2005 |
| 6829965 | Two-piece bicycle crank set The present invention is a two-piece bicycle crank set comprising of two monolithic, thin-wall continuous tubular members. Each tubular member includes a crank arm and a one-half portion of a crank axle, where the crank arm and the portion of the crank axle form a c... | 12/14/2004 |
| 6796200 | Multi speed bicycle transmission including eccentric cranking assembly A bicycle transmission has a plurality of cone gears with multiple gear surfaces and a corresponding plurality of ratio-change assemblies for selecting one of the gear surfaces of each cone gear. One cone gear provides reductions of the input rotary speed while the ... | 09/28/2004 |
| 6755095 | Bicycle crank assembly and assembly tools A bicycle crank arm apparatus includes an axle having a first end portion and a second end portion, wherein the first end portion has an outer peripheral surface and a threaded inner peripheral surface; an axle bolt having a threaded outer peripheral surface screwed... | 06/29/2004 |
| 6607326 | Planetary sphere/ring gear A planetary sphere/ring gear, comprising a sphere and a ring, which are interconnected by a ball and a socket. The ball is located on the edge of a circular opening in the ring and the socket is located on the body of the sphere. Used in conjunction with ... | 08/19/2003 |
| 6568296 | Crank arm quick release device of bicycle The crank arm quick release device of a bicycle includes a fixing threaded sleeve screwed on the rotation shaft of the pedal, and a crank arm formed with locking recesses for locking and fixing the fixing threaded sleeve. Thus, the pedal may be mounted on... | 05/27/2003 |
| 6543308 | Bicycle crank system A quick change chain ring arrangement for use on a bicycle crank assembly includes a chain ring adapter that is connected to and rotates with the crank assembly about the crank assembly rotational axis. A removable chain ring support removably engages wit... | 04/08/2003 |
| 6516685 | Power-saving driving device for treading pedals of bicycle A power-saving driving device for treading the pedals of a bicycle is disclosed. Thereby, the driver may use a smaller force to tread a bicycle so that a higher efficiency is provided. The power-saving device comprises two crank axles. The two crank axles... | 02/11/2003 |
| 6487933 | Pedal-operated drive unit for bicycles or the like The unit comprises two variable-length pedal cranks (20) having a common rotation pin (21) of transverse axis (A), and a mechanism (34, 35, 36) for varying the length of the two pedal cranks (20) on the basis of their angular position; the position of the... | 12/03/2002 |
| 6443033 | Two-piece bicycle crankset A crankset for a bicycle in which the crankshaft separates into two pieces. The separation point is approximately midway between the support bearings for the crankshaft, creating two crankarm/spindle portions. Dowel pins and a bolt are used to connect the... | 09/03/2002 |
| 6419252 | Traveling and accelerating system for riding a bicycle forward regardless the rotation direction of the pedals A traveling and accelerating system for bicycles includes a frame having a front wheel at a front part and a rear wheel at a rear part thereof; a pair of pedals fixed at both sides of a shaft which is rotatably supported at a boss being fixed under a cent... | 07/16/2002 |
| 6419254 | Vehicle with common wheel for steering and propulsion Two or three-wheeled vehicle which comprises a frame, a drive system connected to the frame and provided with a motor or a pedal system, and a handlebar mounted pivotally in the frame for at least one wheel provided with a hub, wherein the hub is connecte... | 07/16/2002 |
| 6419251 | Propelling scooter A propelling scooter includes a chassis, a front wheel steerably attached to a front end of the chassis, a rear wheel rotatably attached to a rear end of the chassis and an elongated pedal disposed longitudinally above the chassis. The pedal has a backwar... | 07/16/2002 |
| 6415684 | Bicycle crank arm parts/assembly and assembly tools A crank arm for fitting to a crank fitting to the crank axle includes a crank axle mounting section having a centering structure for centering the crank axle mounting section to an end of a crank axle, and a rotary linkage member for nonrotatably fitting ... | 07/09/2002 |
| 6398244 | Propelling scooter A propelling scooter includes a chassis, an upright head tube with a handle, a front wheel, and a rear wheel. An elongated pedal is disposed swingably on the chassis. A horizontal transverse first shaft is journalled on the chassis, and is connected fixed... | 06/04/2002 |
| 6393939 | Bicycle crank arm parts/assembly and assembly tools A crank axle includes an axle body having first and second ends, a first rotary linkage member disposed at the first end of the axle body for nonrotatably fitting a first crank arm thereto, and a first centering structure disposed at the first end of the ... | 05/28/2002 |
| 6367352 | Crankset without dead center point, and assembly comprising such a crankset and a measuring appliance The crankset with no dead center position includes a single crankshaft (108), fitted with a left crank (11) and a support hub (119) provided with a lever (20). This hub is mounted by a roller bearing (28) in a stationary eccentric member (26) which suppor... | 04/09/2002 |
| 6314834 | Hollow crank arm A hollow bicycle crank arm 10 is fabricated from first and second components 11, 21 that are affixed at a joint 20 that is distal from the crank spindle mounting boss 12. The joint 20 is at least partially transverse to the long axis of the crank arm 10. ... | 11/13/2001 |
| 6298740 | Adjustable rotational transmission assembly An adjustable rotational transmission assembly 10 coupled to and provides adjustment of final drive ratio for a driven device 12, such as a bicycle, moped, motorcycle, vehicle, etc. Transmission assembly 10 adjusts rotation or drive radius and drive circu... | 10/09/2001 |
| 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 |
| 6244135 | Bicycle drive The bicycle drive mechanism is intended to emulate the behavior of contemporary multiple sprocket bicycle drive mechanisms while comprising far fewer components. In operation force is transmitted to a first drive sprocket which has the capability to absor... | 06/12/2001 |
| 6186017 | Multi-speed bicycle transmission A multi-speed bicycle transmission having a housing including spaced, opposing face plates, with each face plate having a pedal shaft opening and a secondary shaft opening. A pedal shaft is rotatably disposed within the pedal shaft openings of the face pl... | 02/13/2001 |
