Piston rod and piston assembly

Details Piston rod and piston assembly Piston rod and piston assembly

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 1/12 (2006.01) B62K 25/08 (2006.01) F16F 9/32 (2006.01) F16J 3/00 (2006.01)

Patent

CA 2264636

A lightweight low cost damping assembly having a piston rod on which a piston is formed such that fastener elements are not needed to secure the piston onto the piston rod. Preferably, the piston rod is formed by chrome plating the exterior of a tubular steel rod except at a piston attachment portion. The piston attachment portion is specially shaped such that the piston may be formed threon and coupled thereto by the inter-engaging of the piston with the shape of the piston attachment portion. Most preferably, the piston attachment portion is in the form of shallow grooves, knurls or dimples in the exterior of the piston rod and the piston is injection molded thereon. The material of the piston molds itself into the shape of the piston attachment portion, thereby resulting in a secure coupling between the piston and the piston rod.

L'invention concerne un ensemble amortisseur léger et peu onéreux ayant une tige de piston sur laquelle est formé un piston, rendant superflus les éléments de fixation du piston sur la tige. De préférence, la tige de piston est obtenue par chromage de l'extérieur d'un tube en acier, sauf à l'endroit de fixation du piston. Cet endroit a une forme spéciale pour permettre la formation et le couplage du piston par coopération à l'engagement entre ladite forme et le piston. De préférence, l'endroit en question se présente sous la forme de rainures peu profondes, de molettes ou d'embrèvements sur l'extérieur de la tige de piston, le piston étant ensuite moulé par injection en cet emplacement. Le matériau du piston se moule dans la forme de l'endroit considéré, ce qui donne un couplage fiable entre le piston et la tige de piston.

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