Stabilus Gmbh

Gunter Wagner

Hans Pohlenz

According to an illustrative example of this invention, a gas spring is incorporated into a tennis racket. This gas spring is connected with some of the strings such as to maintain a predetermined tension within the strings irrespective of possible elongation of the strings during operation.

Racket, and more particularly a tennis racket

In an illustrative example, an oscillation damper for damping the steering movement of the handle bar of a motorcycle comprises a cylinder and a piston rod axially movable with respect to the cylinder. A damping piston is provided at the inner end of the piston rod and divides the cavity within the cylinder into two working chambers. These working chambers are interconnected by at least one axial bore through the piston. Valve discs are provided on both axial end faces of the piston. These valve discs are fixed to the piston in their respective central areas. Circumferential areas of the valve discs define circumferential gaps with the respective end faces. In response to the velocity of axial relative movement of the piston rod with respect to the cylinder the circumferential areas of respective valve discs are approached to the respective end faces. So the damping resistance is increased.

Oscillation damper

A service car for storing and making available tools, accessories and the like comprises a travelling base. At least one column extends upwards from said travelling base. At least one platform is vertically movable along the column. A balancing gas spring is provided within the column. This balancing gas spring acts onto the platform opposite to the action of gravity.

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Nortershausen, Germany

Gunter Wagner