Shock absorber containing biodegradable fluid

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 105/38 (2006.01) F16F 9/00 (2006.01) F16F 9/19 (2006.01)

Patent

CA 2272268

A shock absorber is comprised of a cylinder defining a chamber therein, the cylinder containing a fluid; a piston rod sealingly projecting into the cylinder and being axially displaceable with respect to the cylinder; a piston being attached to the piston rod, the piston being slidably disposed within the cylinder to sealingly divide the cylinder into first and second chambers; means for permitting fluid communication between the first and second chambers; the means for permitting fluid communication being disposed in at least a portion of the piston. The fluid is comprised of a polyol ester the polyol component of which is a hindered polyol and the carboxylic acid component is a mono-carboxylic acid having from about 5 to about 18 carbon atoms.

La présente invention concerne un amortisseur composé: d'un cylindre définissant une chambre, ledit cylindre contenant un fluide; d'une tige de piston se projetant de façon étanche dans le cylindre et pouvant être déplacée axialement par rapport au cylindre; d'un piston attaché à la tige de piston, le piston étant placé coulissant à l'intérieur du cylindre de manière qu'il divise de façon étanche ledit cylindre en une première et une deuxième chambre; et de moyens permettant une communication fluidique entre la première et la deuxième chambre, ces moyens étant placés dans au moins une partie du piston. Le fluide est composé d'un polyol ester dont le composant polyol est un polyol inhibé et le composant acide carboxylique est un acide monocarboxylique renfermant entre 5 et 18 atomes de carbone environ.

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