초록

In the illustrative embodiments of the invention disclosed, the extension force of a gas spring is controlled as a function of temperature by varying the volume of the working chamber entered by the piston rod, and thus the gas pressure within the working chamber, as a function of temperature.

대표청구항 ▼

A gas spring comprising a vessel the interior of which contains a volume of gas under pressure and forms a working chamber entered by a piston rod guided within the vessel and sealed off against the outside, the extension force acting on the piston rod being equal to the product of the pressure in t

A gas spring comprising a vessel the interior of which contains a volume of gas under pressure and forms a working chamber entered by a piston rod guided within the vessel and sealed off against the outside, the extension force acting on the piston rod being equal to the product of the pressure in the working chamber and the cross-sectional area of the piston rod, wherein the improvement comprises: a sliding parting piston defining an axially movable wall of the working chamber and sealed against the vessel; and means for moving said parting piston as a function of change in ambient temperature so as to vary the volume of the working chamber in a manner to maintain the extension force within desired limits, said parting-piston moving means comprising a chamber containing an expansion medium and means operatively coupling said sliding parting piston to said expansion chamber.