Stabilus Gmbh

Rainer Massmann

Rolf Mintgen

Stefan Bonnekessel

Marian Bochen

Stephan Enders

Rainer Sauer

Holger Ansel

Meik Broeder

Alexander Koehl

Marc Nadler

Willi Nieratschker

Andreas Ritter

Axel Knopp

Frank Born

Michael Kleinmann

Wilhelm Schwab

Dirk Rennecke

Thomas Ehre

Bernd Arenz

Daniel Herbst

Moritz Starkmeth

Heiko Schilken

Karl-Heinz Darscheid

Dirk Schweinberger

Torsten Rickenberg

Jörg-Erwin Scheuer

Joachim Völlinger

Kathrin Peifer

Udo Wendland

Mihai Augustin Vidrean

Rolf Mingten

Apparatus for lifting a hatch which can pivot around a pivot axis, especially a hatch of a motor vehicle, by means of a piston-cylinder unit. The piston-cylinder unit has a closed cylinder filled with a pressurized fluid, the interior of the cylinderbeing divided by a piston into a first working chamber and a second working chamber. A piston rod passes through the second working chamber and is guided to the outside through a seal at the end of the cylinder and then hinged to the hatch, whereas the other end of the cylinder is hinged to a stationary component. A through-opening leading from the first working chamber to the second working chamber, is provided in the piston. The through-opening can be opened by an electrically actuated valve.

Device for lifting a hatch pivotable around a pivot axis

The invention pertains to a piston-cylinder unit for a hinged lid, especially a motor vehicle hinged lid, with a closed first end, a cylinder, a piston installed in the cylinder with freedom to slide back and forth, the piston dividing the cylinder into a working chamber remote from the first end and a second working near the first end; and a piston rod, which is attached to one side of the piston, projects through the first working chamber, and passes out of the cylinder concentrically to the central longitudinal axis of the cylinder through a guide and sealing device at the second end opposite the first end, where a first locking element is provided on the piston rod, and a second locking element is provided on the cylinder to establish a mechanical interlock, and where one of the locking elements comprises a sleeve, which cooperates with the other locking element to establish an interlock.

Piston-cylinder unit

A displacement element includes a first piston, a second piston, a cylindrical housing filled with a fluid under pressure, a piston rod, and a spring. Each of the pistons is adapted to the respective internal diameter of its section and divides the respective section into two pressure chambers. The first piston is arranged at one end of the piston rod, and both pistons each include means for damping the movement of the piston rod respectively in one direction. The second piston is arranged on the side of the first piston facing away from the piston rod and is capable of displacement by means of the first piston in a direction facing away from the open end. The spring is arranged on the side of the second piston facing away from the first piston, and supported by the second piston and the housing.

Displacement element

A piston/cylinder unit includes a closed cylinder filled with a fluid under pressure, a piston dividing the cylinder into a first working chamber and a second working chamber, and a piston rod extending through the second working chamber. A passage through the piston connects the first working chamber to the second working chamber, and a valve closing member is movable between an open position and a closed position wherein the member closes the passage. A solenoid includes a coil, a coil core, and an armature in the piston, the armature driving the valve closing member between the closed position and the open position in response to a magnetic field produced by a current applied to the coil, the cylinder forming a magnetic field guide tube. The coil is supplied with current by a power line in the piston rod, and may be grounded to the piston rod or the cylinder.

Piston/cylinder unit with solenoid valve in piston

An opening device for a flap of a vehicle, in particular for a rear flap, pivotable about a horizontal pivot axis on the upper edge of an opening in the vehicle body from a closed position into an open position having a gas-filled spring coupled to the body by the free end of its piston rod at a distance from the pivot axis and coupled to the flap by its pressure tube at a distance from the pivot axis. The gas-filled spring in the exload direction applies a force to the flap in the opening direction. Furthermore, an actuator can act on the flap in the opening direction. The actuator is an energy accumulator which, applies a force to the flap during its opening stroke from the closed position until a relaxed position of the energy accumulator is reached.

Opening device

A spring system has a first pulling part with a first fastening element connected by a tension spring to a second pulling part with a second fastening element. The pulling parts are moveable relative to one another so as to increase or relieve stressing on the tension spring. A damping device damps the movement of the pulling parts in relation to one another. A cylinder is fastened on the first pulling part and a piston 3 is axially displacesably arranged therein, subdividing the interior of the cylinder into a first cylinder chamber and a second cylinder chamber. A piston rod connected to the piston is arranged on the second pulling part. The interior of the cylinder is connected to the surroundings via one or more restrictor openings.

Spring system

The invention relates to a gas spring which uses a compensating medium acting on a compensating piston in order to compensate the dependence on temperature of its characteristic. According to a first aspect of the invention, a compensating medium (M) is selected whereof the critical temperature (T) is between the lower limit temperature (T) and a temperature exceeding the upper limit temperature (T) Of the range of operating temperatures of the gas spring () by up to 100&#xb0; C., and the gas spring () is designed such that, at an operating temperature (T) of the gas spring () not exceeding the critical temperature (T) of the compensating medium (M), the point indicating the state of the compensating medium (M) lies on or above the vapor pressure curve. According to a second aspect, in order to simplify the structure of the gas spring (), a single compensating piston () which takes the shape of a cup is used and separates the working chamber (Ia), the compensating chamber () and the restoring chamber () of the gas spring () from one another.

Gas spring

The invention relates to a gas spring which uses a compensating medium acting on a compensating piston in order to compensate the dependence on temperature of its characteristic. According to a first aspect of the invention, a compensating medium (M) is selected whereof the critical temperature (T) is between the lower limit temperature (T) and a temperature exceeding the upper limit temperature (T) of the range of operating temperatures of the gas spring () by up to 100&#xb0; C., and the gas spring () is designed such that, at an operating temperature (T) of the gas spring () not exceeding the critical temperature (T) of the compensating medium (M), the point indicating the state of the compensating medium (M) lies on or above the vapor pressure curve. According to a second aspect, in order to simplify the structure of the gas spring (), a single compensating piston () which takes the shape of a cup is used and separates the working chamber (), the compensating chamber () and the restoring chamber () of the gas spring () from one another.

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Bonn, Germany

Rainer Massmann