Durkopp System Technik Gmbh

Burghardt Vossen

Gerd Kupper

Siegfried Zabinski

The invention relates to a bicycle, the frame (31) of which is connected to a single-arm drive extension (30) which, at its rear end, has firmly connected to it a rear wheel axle (11a) which is rotatably mounted and can be driven by a drive device (38,33,34,35), onto which rear wheel axle (11a) the rear wheel can be attached from one side. Moreover, the front wheel holder connected to the bicycle frame (31) is designed as a monospar fork (1), with the front wheel axle (11) being firmly connected to the monospar fork (1) for accommodating the front wheel on one side. The wheels (8a,8b) have wheel hubs (9a,9b) which are designed in half shell shapes and are open towards the axle bearing devices (12,13,14), with a break device (22), which is firmly connected to the axle bearing device, being arranged within at least one half shell shaped wheel hub, which brake device (22) can be pressed against the inner peripheral surface of a wheel hub (9a, 9b) for braking the bicycle. The bicycle according to the invention, apart from identical wheels, has practically identical axle bearings and brake devices for the front and rear wheels, which are protected from external influences by the wheel hubs. By releasing only one screw (20), it is possible to change a wheel without dismantling the brake devices.

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Gutersloh, Germany

Burghardt Vossen