Gas spring arrangement

F - Mech Eng,Light,Heat,Weapons – 16 – F

Patent

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Details

F16F 9/48 (2006.01) F16F 9/02 (2006.01) F16F 9/36 (2006.01)

Patent

CA 2186473

The invention relates to an arrangement for a gas spring. The arrangement comprises a cylinder (1). At its one end, this is delimited by a fixed end wall (2), and at its other end there is a first guide (3) sealed against the inner wall of the cylinder (1) and against a piston rod (4) capable of axialmovement within the cylinder (1). The piston rod (4) has a second guide (8) mounted in such a way as to be capable of sliding against the inner wall. An annular piston (9) sealed against the inner wall and against the piston rod (4) is mounted on the piston rod (4) between the guides (3; 8) in such a way that it is free to slide. This divides the inner space of the cylinder (1) into a first and a second part space (12; 13). In an initial position, in which the gasspring is unaffected, there is present in the first part space (12) a pressure which is greater than the pressure present in the second part space (13). The annular piston (9) is retained between the guides (3, 8) through the effect of the pressure acting upon, on the one hand, one surface (9a) of the annular piston (9) and, on the other hand, the other surface (9b) of the annular piston (9) and the end surface (4a) of the piston rod (4).

L'invention concerne un dispositif conçu pour un ressort pneumatique. Ce dispositif comporte un cylindre (1) délimité à une de ses extrémités par une paroi d'extrémité fixe (2) et, à son autre extrémité, se trouve un premier guide (3) scellé contre la paroi intérieure dudit cylindre (1) et contre une tige de piston (4) pouvant effectuer un déplacement axial à l'intérieur du cylindre (1). La tige de piston (4) possède un deuxième guide (8) monté de manière à pouvoir coulisser contre la paroi intérieure. Un piston annulaire (9) scellé contre la paroi intérieure et contre la tige de piston (4) est monté sur ladite tige de piston (4) entre les guides (3, 8) de façon à pouvoir coulisser librement. Ceci divise l'espace intérieur du cylindre (1) en un premier et en un deuxième espace partiel (12, 13). En position initiale de non-actionnement du ressort pneumatique, une pression dans le premier espace partiel (12) est supérieure à la pression présente dans le deuxième espace partiel (13). Le piston annulaire (9) est retenu entre les guides (3, 8) sous l'effet de la pression s'exerçant, d'une part, sur une surface (9a) du piston annulaire (9) et, d'autre part, sur l'autre surface (9b) du piston annulaire (9) et sur la surface d'extrémité (4a) de la tige de piston (4).

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