Durkopp System Technik Gmbh

Siegfried Zabinski

Gerd Kupper

Wolfgang Bruder

Klaus Biervert

Burghardt Vossen

Manfred Geilhaupt

Klaus Bievert

A cutting portal for an ultra-high-pressure fluid jet cutting system separates the longitudinal and transverse motion of the cutting head support. The portal includes two parallel plates with lightweight, honeycomb composite material between them. The cutting portal is moved transversely of its length longitudinally of the cutting table. A guide rail for the cutting head support is supported in the honeycomb material and extends along the length of the cutting portal, transversely to the motion of the cutting portal. Spaced apart bearing shafts are supported by bearing shells in the honeycomb material. A driven belt passes around the shafts and moves the cutting head support along the guide rail, which provides motion of the cutting jet in the transverse direction of the cutting table.

Cutting portal of an ultra-high pressure fluid jet cutting system

A material resting surface for a workpiece support, for use with non-mechanical cutting tools of the type which pass a cutting jet, or the like, through the workpiece and into the support. The workpiece support is coated with a kneadable composition, i.e. a substance or mixture of substances of a highly viscous or pasty consistency, and after each cutting process, a reproducible defect-free surface is restored by kneading the composition.

Material resting surface

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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Bielefeld, Germany

Siegfried Zabinski