Class / Patent application number | Description | Number of patent applications / Date published |
074594200 | With attached gear | 32 |
20100050810 | 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 intermediate member non-rotatably around the boss | 03-04-2010 |
20100064845 | 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 case the spindle has at least a first coupling end with an internally tapped axial bore defined therein and the second crank arm forms at least a first socket at its axle end. At least a first wedging sleeve is provided and is disposed about the first coupling end of the spindle. The first wedging sleeve conforms to the shapes of both the first coupling end of the spindle and the hollow cavity in the first socket. Either the coupling end of the spindle or the hollow cavity is axially tapered, and the wedging sleeve is tapered to match so that as the first socket is drawn onto the first coupling end of the spindle, the wedging sleeve is increasingly forced in between the inner radial surface of the hollow cavity of the socket and the outer radial surface of the coupling end of the spindle. The wedging sleeves may be interconnected by flexible, elastic straps to allow each individual shim to move independently of the other. | 03-18-2010 |
20110126666 | CRANK SET FOR A BICYCLE - A crank set for a bicycle includes a crankshaft having a drive side shaft end part ( | 06-02-2011 |
20110174110 | BOTTOM BRACKET - A bottom bracket, which has a shaft, a first pedal crank, which is connected in a rotationally fixed manner to the shaft, a second pedal crank, which is connected in a rotationally fixed manner to the shaft, and a chainring carrier, which is connected to the shaft. The object of providing a bottom bracket with a chainring carrier that is easy to assemble is achieved by the chainring carrier being connected in a rotationally fixed manner to a chainring shaft and by the chainring shaft being connected in a rotationally fixed manner to the shaft. | 07-21-2011 |
20110290069 | Connecting and adjusting structure for a crank assembly - A connecting and adjusting structure for a crank assembly used in a bicycle contains a first tube of a first connector including a first hollow portion, the first connector including a first bearing seat to receive a first ball bearing, the first bearing seat includes a first engaging tab, a first adjusting rib, and the first tube, a second connector including a second bearing seat to receive a second ball bearing, a dustproof cover, and a retaining ring, the second bearing seat including a second engaging tab, a second adjusting rib, and a second tube, a second crank including a central shank with plural T-shaped teeth and second internal screws, a first crank including a hollow post with a Tee groove fixed to engage with the T-shaped teeth, and a screw is inserted through the hollow post to be screwed with the second internal screws. | 12-01-2011 |
20120042746 | BICYCLE CRANK ASSEMBLY - A bicycle crank assembly is provided that basically provided with a crank arm that includes a first outer shell, a second outer shell, a first axle supporting member and a second axle supporting member. The first outer shell has a first elongated portion with a first axle attachment end. The second outer shell has a second elongated portion with a second axle attachment end. The first and second outer shells are adhesively attached together to form an interior cavity therebetween. The first axle supporting member is disposed at the first axle attachment end of the first outer shell. The first axle supporting member has a first bore with a first splined inner surface that is at least partially disposed in the interior cavity between the first and second outer shells. The second axle supporting member is disposed at the second axle attachment end of the second outer shell. The second axle supporting member has a second bore with a second splined inner surface that aligns with the first splined inner surface of the first bore and that is at least partially disposed in the interior cavity between the first and second outer shells. | 02-23-2012 |
20120167709 | Length adjustable bicycle crank - A crank system mounted to a drive sprocket of a bicycle includes a crank arm secured to the drive sprocket and disposed at both sides thereof, the crank arm having two bent ends; and two telescopic assemblies each comprising a bar having one end fixedly secured to either end of the crank arm, the bar having a cross section of polygon, the bar including a plurality of longitudinal notches, a sliding tube slidably put on the bar, the sliding tube including a surface opening communicating with the bar, and a pivotal lock member in the surface opening, the lock member being adapted to either dispose in one of the notches in a locked position of the telescopic assembly or clear the notch in a unlocked position of the telescopic assembly. This length adjustable bicycle crank system can save force when pedaling. | 07-05-2012 |
20130008282 | FLOATING FRONT RING - A bicycle transmission system is provided herein. The bicycle transmission system includes a sprocket or ring that is capable of sliding amongst an infinite number of lateral positions relative to a crank arm. The movement of the sprocket or ring facilitates an optimal chain path from the sprocket or ring to another sprocket or ring in the transmission system and, therefore, increases the efficiency with which power is transferred through the system. | 01-10-2013 |
20130087012 | BICYCLE CRANK ASSEMBLY - A bicycle crank assembly is provided with a first sprocket, a second sprocket, a crank arm, a sprocket fixing structure and an alignment tube. The first sprocket includes a plurality of first teeth and at least one first mounting portion having a first mounting opening. The second sprocket includes a plurality of second teeth and at least one second mounting portion having a second mounting opening. The crank arm includes at least one sprocket attachment portion having a third mounting opening. The sprocket fixing structure secures the first and second sprockets to the crank arm via the first, second and third mounting openings. The alignment tube extends through at least two of the first, second and third mounting openings. | 04-11-2013 |
20130087013 | BICYCLE SPROCKET - A bicycle sprocket is provided that includes an external peripheral edge part and an internal peripheral edge part. The external peripheral edge part has a plurality of metal sprocket teeth. The internal peripheral edge part is positioned radially inward of the external peripheral edge part. The internal peripheral edge part is integrally formed as a one-piece unit with the external peripheral edge part. The internal peripheral edge part has at least one recess that extends radially outward from an inner edge of the internal peripheral edge part toward the external peripheral edge part. | 04-11-2013 |
20130091982 | TRACTION SYSTEM USING A DOUBLE-CRANK ALTERNATING CYCLE - Double crank alternating cycle traction system in which two independent free-turning cranks with a dynamic articulation at the place where the force is applied are strategically added to a conventional pedal cycle. The operation of the resulting mechanical composition increases the mechanical advantage of the original system. The invention is applicable to pedal cycles, mainly all kinds of bicycles, i.e. bicycles, tricycles, four-wheeled bicycles, moved by the extremities of the human body, i.e. the hands or feet. | 04-18-2013 |
20130098197 | Crank Assembly for Acrobatic Bicycle - A crank assembly for an acrobatic bicycle includes a mandrel, two cranks, a chainwheel, and a connector. The chainwheel has a shaft hole and a fixing hole. The connector has a mounting hole and a locking hole connected with the shaft hole and the fixing hole respectively. The mounting hole has a mounting portion inserted into the shaft hole. The mounting hole has an engaging surface. The mandrel has two urging portions, and one of the urging portions is extended through the mounting hole and is engaged with the engaging surface. Thus, the connector is connected with the chainwheel and located between the chainwheel, the mandrel and one of the cranks to enhance the structural strength of combination of the chainwheel, the mandrel and the two cranks. | 04-25-2013 |
20130139642 | Chainring - A solitary chainring of a bicycle front crankset for engaging a drive chain, including a plurality of teeth formed about a periphery of the chainring, the plurality of teeth consisting of an even number. The plurality of teeth includes a first group of teeth and a second group of teeth arranged alternatingly between the first group of teeth. The first group of teeth and the second group of teeth are equal in number. Each of the first and second group of teeth include an outboard side and an inboard side opposite the outboard side and each tooth of the first group of teeth includes at least a first protrusion on the outboard side thereof and each tooth of the second group of teeth are free of the first protrusions on the outboard side and the inboard side. | 06-06-2013 |
20130205945 | PEDAL FORCE SENSOR AND ELECTRICALLY-ASSISTED VEHICLE USING SAME - Provided is a pedal force sensor which, in pedal force detection utilizing an elastic body, can detect pedal force over a wide range and reduce detection errors originating from variation in the attachment position or length etc. of the elastic body. Linkage between a drive wheel ( | 08-15-2013 |
20130233127 | RIGHT CRANK ARM ASSEMBLY FOR A BICYCLE - A right crank arm assembly for a bicycle has a right crank arm and at least one toothed crown that is coupled to the right crank arm. At least one damping element is arranged between the right crank arm and the toothed crown to be in abutment against respective faces of the right crank arm and the toothed crown. | 09-12-2013 |
20130291678 | RIGHT CRANK ARM ASSEMBLY FOR A BICYCLE AND CRANK ARM AND FRONT SPROCKET THEREOF - A right crank arm assembly for a bicycle, comprises a right crank arm and at least one front sprocket coupled with the crank arm at at least one coupling portion of the crank arm. The front sprocket has an inner side adapted, in use, to face towards the frame of the bicycle and an outer side opposite the inner side. The assembly comprises at least one first crank arm element which acts in contact with the front sprocket on one of said sides and at least one second crank arm element which acts in contact with the front sprocket on the other of said sides. The contact action of the crank arm elements on the two opposite sides of the front sprocket prevents the twisting deformation of the front sprocket during pedaling. Such a deformation would cause a reduction in the transmission efficiency of the right crank arm assembly. | 11-07-2013 |
20130340565 | BICYCLE CRANK SET - A bicycle crank set is comprising a crank having at least one support portion protruding therefrom, a first lateral surface, a second lateral surface opposite to the first lateral surface; a first chain wheel located at the first lateral surface and having a second through hole; a second chain wheel located at the second lateral surface and having at least one threaded hole; and a screw bolt inserted outward through the second through hole and then the first through hole to be engaged with the threaded hole. Accordingly, the bicycle crank set is structurally simple and convenient in assembly and the head of the screw bolt is hidden at the inner side of the crank set to be aesthetic in appearance. | 12-26-2013 |
20140013900 | BICYCLE FRONT SPROCKET - A bicycle front sprocket has a sprocket body and a chain engagement structure. The sprocket body has a center rotational axis, a first side surface and a second side surface. The second side surface is a smaller sprocket facing side. The chain engagement structure is disposed on an outer periphery of the sprocket body. The chain engagement structure includes a plurality of sprocket teeth extending radially outward from the outer periphery of the sprocket body. The sprocket teeth include at least one first tooth having a first tooth top with a first leading edge and a first trailing edge. The first leading edge is positioned downstream from the first trailing edge with respect to the driving-rotational direction of the bicycle sprocket. The first tooth top is shaped so that the first leading edge is positioned closer to the first side surface than the first trailing edge in the axial direction. | 01-16-2014 |
20140157949 | CRANKSET FOR A BICYCLE - A bicycle crankset including a first crank and a second crank, and a spider that secures at least one chain ring to the crankset Each of the first crank and the second crank has an end adapted to engage a pedal. The crankset also includes a spindle extending between and engaged with the first crank and the second crank. The spindle includes a radially extending arm and a protrusion disposed on the arm, and the arm co-molded with the spider to transmit torque to the spider. | 06-12-2014 |
20140157950 | Synchronously Controlling Device for a Bicycle - The present invention is directed to a device for synchronously actuating at least two independent controlled apparatuses at two sides of the bottom bracket of the bicycle through a driving process. The independent controlled apparatuses can be foldable pedals or quick-disassembling pedals or foldable cranks. | 06-12-2014 |
20140157951 | SELF LOCKING BEARING PRELOAD ADJUSTER - A bearing preload adjuster for a bicycle crank set and bottom bracket comprises an adjustment ring for coupling with a bicycle crank arm, a movable plunger comprising an external thread for rotatably coupling with the adjustment ring. The adjustment ring is rotated in order to cause the plunger to extend along an axis of the bottom bracket and apply pressure to a bottom bracket bearing inner race. The adjustment ring is rotated until the clearance in the bearing assemblies and the play in the bottom bracket assembly has been eliminated. This allows the crank assembly to rotate freely, while preventing the crank assembly from sliding side to side inside the bearing bores and along the axis of the crank spindle. | 06-12-2014 |
20140196569 | COMPOSITE BICYCLE COMPONENT - A composite bicycle component includes a first member made of a metallic material. The first member has a surface with a first dimple. The first dimple includes a second dimple that is formed on the first dimple. Preferably, the composite bicycle component further includes a second member attached to the first member so that a part of the second member extends into the first and second dimples. | 07-17-2014 |
20140338494 | BICYCLE SPROCKET AND BICYCLE CRANK ASSEMBLY - 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. | 11-20-2014 |
20140360314 | CRANKSET AND BOTTOM BRACKET ASSEMBLY - A crankset and bottom bracket assembly for a bicycle having a spindle. The crankset and bottom bracket assembly comprising a first crank. The first crank comprising a first ratchet mechanism configured for connection to the spindle at a first end. Wherein when the first ratchet mechanism is rotated in a first direction relative to the spindle, the pawl does not engage the tooth and the first crank freewheels relative to the spindle, and wherein when the first ratchet mechanism is rotated in a second direction relative to the spindle, the pawl engages the tooth and rotation of the first crank drives the rotation of the spindle. | 12-11-2014 |
20150007689 | SPROCKET FOR BICYCLE - In a sprocket for a bicycle having a radial bearing acting as a bearing portion, an axial load acting on the bearing can be easily adjusted without having to dismount the components of the bicycle after the bicycle has been assembled. | 01-08-2015 |
20150082939 | BICYCLE CRANK ARM AND CHAINRING CARRIER ASSEMBLY - A bicycle crank arm and chainring carrier assembly. The assembly includes a crank arm. A chainring carrier is sized and shaped to connect to the crank arm. A first pairing feature is formed on one of the crank arm and the chainring carrier and a second pairing feature is formed on the other of the crank arm and the chainring carrier to position the chainring carrier on the crank arm. A clearance is defined between the first and second pairing features when the first and second pairing features are paired. A torque-transmitting coupling between the crank arm and the chainring carrier is configured to transmit substantially all of the torque applied to the chainring carrier from the crank arm. | 03-26-2015 |
20150090071 | CRANK ASSEMBLY OF A SHAFT DRIVEN BICYCLE - A crank assembly of a shaft driven bicycle includes a crank arm pivoted to an axis of a bicycle frame for arranging pedal. The crank arm has at least one main transmission gear to be engaged with a passive gear of a passive shaft. Teeth of the main transmission gear face opposite to the crank arm. The main transmission gear of the crank assembly won't interfere with the axis of the bicycle, and the main transmission gear is driven directly by the crank arms for better power transmission efficiency. | 04-02-2015 |
20150096408 | Dual-Drive Hub Device - A dual-drive hub device is mounted on a rear wheel of a bicycle and has a hub, a main shaft mounted through the hub, and two rear pedals connected to the main shaft. At least one one-way bearing is tightly fitted between the hub and the main shaft. A rear transmission wheel of a transmission system of the bicycle is mounted around the hub. When two front pedals of the bicycle are pedaled, the hub and the rear wheel rotate accordingly. When the rear pedals are pedaled, the main shaft, the hub and the rear wheel rotate accordingly. Thus, a rider and a passenger can pedal the front pedals and the rear pedals simultaneously and enjoy ease of bicycle pooling. | 04-09-2015 |
20150114171 | Crank Systems and Methods - A crank system of the present disclosure has a rotating bar that is fixedly coupled to a first end of a first axle and for actuating a wheel, a first crank assembly coupled to the first end of the first axle and coupled to a first pedal, and a second crank assembly coupled to a second end of the first axle and a second pedal. The first crank assembly and the second crank assembly are coupled to the first axle such that the rotating bar is aligned with a wheel gear assembly adapted for rotating the wheel when the first pedal and second pedal are at their zenith and nadir positions, alternatively. | 04-30-2015 |
20150114172 | Crank Systems and Methods - A crank system of the present disclosure has a first crank assembly that is coupled to a first end of a first axle and coupled to a first pedal. The crank system further has a second crank assembly coupled to a second end of the first axle and a second pedal. Additionally, the crank system has a rotating wheel fixedly coupled to the first crank assembly and the second crank assembly such that as the first and second pedals are actuated by a user, the rotating wheel rotates thereby actuating a chain and inducing motion in a vehicle. | 04-30-2015 |
20160031523 | BICYCLE CRANK ASSEMBLY - A bicycle crank assembly comprises a crank axle, a first crank arm, and a battery holding structure. The crank axle comprises a cavity and a first end portion. A battery unit is to be provided in the cavity. The first end portion has a first end opening which is in communication with the cavity. The first crank arm is configured to be mounted on the first end portion. The battery holding structure is configured to hold the battery unit in the cavity. The battery holding structure is configured so that the battery unit is replaceable through the first end opening in a state where the first crank arm is mounted on the first end portion of the crank axle. | 02-04-2016 |
20180022414 | PIVOTING CHAINRING ASSEMBLY | 01-25-2018 |