Krupp Bilstein Gmbh

Thyssenkrupp Bilstein Gmbh

Marcello Di Fina

Walter Wirtz

Klaus Hofmann

Michael H&ouml;nig

Walter Krenkel

Ralph Renz

Günter Poetsch

G&uuml;nter Poetsch

A piston-rod assembly with a piston rod having at least one attachment at one end. The piston rod is fabricated of fiber reinforced composite. The piston rod has a body of fiber-reinforced ceramic with a basic matrix of carbon fibers or ceramic fibers or both wherein at least silicon carbide is embedded and with an open porosity, at least at the surface layer, of no more than 3% of the volume of that layer admitting lubricants into the pores. The at least one attachment (or) includes at least one component of a non-ceramic material that fits into and/or interlocks with the piston rod.

Piston-rod assembly

A resilient leg as part of an attachment for the wheel of a motor vehicle. The leg is provided with a piston rod ( ) that has a piston ( ) attached to it, that travels into and out of a housing ( ), that is attached at its outer end to the vehicle's chassis, and that is maintained in radial alignment by two separated bearings. The piston divides the interior of the housing into two fluid-charged chambers ( & ). The object is to ensure satisfactory transmission of moments of force from the piston rod to the housing in a leg that is light in weight. The piston rod accordingly extends through, and is maintained in radial alignment at, both ends of the leg.

Resilient leg

A hydraulic dashpot with a cylinder ( ) full of shock-absorbing fluid, with a piston ( ) mounted on the end of piston rod ( ), traveling back and forth inside the cylinder, separating the cylinder into two compartments ( & ), and provided with ports and shock-absorption valves, and with a variable bypass system accommodated in an axial bore ( ) in the piston rod provided with lateral radial openings ( & ) extending through the rod. The object is to allow fixed independent establishment of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the suction phase and of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the compression phase. The bypass system is accordingly provided with an axially moving control tube ( ) whereof one end comes to rest against one valve assembly ( ) and the other end comes to rest against another valve assembly ( ) and whereby its axial motion is limited by stops.

Hydraulic dashpot

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Bochum, Germany

Marcello Di Fina