Method of manufacturing gas springs

Details Method of manufacturing gas springs Method of manufacturing gas springs

B - Operations, Transporting

21

B

B21B 17/02 (2006.01) B21C 37/20 (2006.01) B21H 7/18 (2006.01) F16F 9/02 (2006.01) F16F 9/32 (2006.01)

Patent

CA 2341401

The method includes making a fluid communication channel (44), which has a selectively variable cross-sectional area profile, in the inner face of a gas spring cylinder (32) so as to permit fluid communication at different selective rates bypassing around or across the piston assembly (68) of the gas spring (52) as the piston assembly (68) moves within the cylinder (32). Preferably the cross-sectional area profile of the fluid communication channel (44) is initially substantially the same throughout the length of the channel (44) and is thereafter selectively changed in certain portions of the channel (44) so as to restrict and in some instances block gas or fluid flow through the fluid communication channel (44).

L'invention concerne un procédé comprenant la fabrication, sur la face intérieure d'un cylindre (32) de ressort à gaz, d'un canal (44) de communication fluidique présentant un profil transversal dont la superficie peut être variée sélectivement, et qui permet le passage du fluide à différentes vitesse sélectives autour ou à travers de l'ensemble (68) piston du ressort (52) à gaz pendant le mouvement de l'ensemble (68) piston à l'intérieur du cylindre (32). Initialement, la superficie transversale du canal (44) de communication fluidique est de préférence sensiblement identique sur toute la longueur du canal (44), puis elle peut être modifiée sélectivement sur certaines portions du canal (44) de manière à restreindre et à bloquer le cas échéant le passage du gaz ou du fluide à travers la canal (44) de communication fluidique.

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