Abstract: A wheelchair comprises a frame and two main wheels each coupled to a hand rim for actuating the wheels in both directions of rotation and for braking.

Abstract: A wheel hub has an axle device and a braking device. The axle device has an axle and a hub body. The hub body is mounted rotatably around the axle. The braking device is connected to the axle device and has a driving sleeve, a braking sleeve, a pressing jacket, and a fixing member. The fixing member is mounted in the hub body, is mounted around an end of the axle, and has a first end and an elongated engaging protrusion. The elongated engaging protrusion is formed on and protrudes from the first end of the fixing member.

Abstract: A rotor system for a bicycle (1), for the purpose of bearing a fork (8) and transmitting the actuations of Bowden cables (31, 32), which each having a core (31a; 32a) includes first and second transmission elements (36, 37), that rotate relative to one another and are arranged in the area of the bearing (21, 23, 25) of the fork (8). The transmission elements include an annular region, mounted on a fork steerer (12) and surrounded by a head tube (21), and connection areas (36b; 37b) for the direct or indirect attachment of the rotor-side ends of the cores (31a 32a). At least one of the transmission elements (37) includes a connection area (37b) with a connecting element, which (32b) can be form-fittingly attached, interacting with, or being integrally connected to, the rotor side end of the core (32a) that is assigned with said at least one transmission elements (37).

Abstract: A free coaster bicycle wheel driving apparatus having a clutch that employs radially acting components. A drive sleeve has an inner cylindrical wall surface mounted coaxially about a wheel mounting shaft and an outer cylindrical wall surface that is eccentric relative to the drive sleeve inner wall surface. The outer surface of the drive sleeve cooperates with a power transmission sleeve that has an inner cylindrical wall surface that is eccentric relative to its cylindrical outer wall surface. The power transmission sleeve is interposed between the drive sleeve and a wheel hub. When the eccentric lobe on the drive sleeve is in opposition to the eccentric lobe on the surrounding power transmission sleeve, the sprocket is disengaged from the wheel hub. Forward rotation of the sprocket jams the lobe of the drive sleeve against the power transmission sleeve, forcing its cam lobe outwardly into frictional engagement with the wheel hub.

Abstract: The present invention refers to a bicycle hub being part of the drive mechanism 1 of a BMX bicycle comprising: an axle 5, a first part 7 being seated on said axle 5 and being provided with or connected to a cog 6, a second part 8 being movable relative to said first part 7 in longitudinal and rotational direction of said axle 5, said first part 7 and said second part 8 being in contact with each other via a screw coupling provided by threads 7? and 8?, a hub body 11 being arranged around at least said second part 8, said second part 8 being provided with a first cone surface 9, said hub body 11 having a second cone 10 surface formed thereon or connected thereto, wherein said two cone surfaces 9, 10 are engageable for power transmission, wherein an adjustable stopper mechanism 12 is provided, limiting a gap providing space for an axial movement of said second part 8.

Abstract: A bicycle hub includes a hollow hub shell, and an axle extending through the hub shell. The axle is formed integrally with diameter-enlarged first and second inner race portions that are respectively disposed in opposing first and second end portions of the hub shell. Each of the first and second inner race portions is formed with an inner race groove that opens toward a respective one of the first and second end portions of the hub shell. Annular first and second cap members are sleeved on the axle. Each of the first and second cap members has an outer race forming portion that extends into and that is mounted to a respective one of the first and second end portions of the hub shell. The outer race forming portion is formed with an outer race groove that opens toward the inner race groove in a respective one of the first and second inner race portions of the axle.