Stabilus Gmbh

Martin Muller

Herbert Freitag

Klaus Schnitzius

Willi Schafer

A gas spring must be filled with pressurized gas through an opening. This opening must be closed after the filling operation while maintaining the gas pressure within the gas spring. According to an illustrative example of the invention, the filling opening is bored by a laser beam, while the location of the opening to be bored is confined within a filling chamber. After such laser boring of the opening, pressurized gas is admitted to the filling chamber and flows from the filling chamber into the gas spring. Hereinafter, the opening is closed again by directing the laser beam against an annular zone surrounding the opening.

Gas spring, a method of filling a gas spring with pressurized gas and an

In the illustrative embodiment of a current-carrying pneumatic spring disclosed, flow of electric current between external terminals on the cylinder member and piston rod member of the spring is provided by a contact element fixed on one of the members and carrying one or more contact faces which are resiliently biased into sliding engagement with an axially elongated face portion of the other member. Flow of electric current between the external terminals may thereby be provided over a range of positions or over all positions of axial movement of the piston rod member inward and outward of the cylinder cavity.

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Koblenz, Germany

Martin Muller