A combination of a chamber and a piston, a pump, a motor, a...

F - Mech Eng,Light,Heat,Weapons – 04 – B

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Details

F04B 53/16 (2006.01) F04B 53/14 (2006.01) F16F 7/09 (2006.01) F16J 1/00 (2006.01) F16J 1/06 (2006.01) F16J 10/02 (2006.01)

Patent

CA 2442224

A piston-chamber combination comprising an elongate chamber which is bounded by an inner chamber wall and comprising an elastically deformable piston comprising a container in said chamber to be sealingly movable relative to said chamber at least between first and second longitudinal positions of said chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions of said chamber and at least substantially continuously different cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions thereof, the cross-sectional area at the first longitudinal position being larger than the cross-sectional area at the second longitudinal position, said piston including a piston body and sealing means supported by the piston body for sealing on said inner chamber wall. Said piston body being designed to adapt itself and said sealing means to said different cross-sectional areas of said chamber during the relative movements of said pistion from the second longitudinal position through said intermediate longitudinal positions to the first longitudinal position of said chamber.

L'invention concerne une combinaison piston-chambre comprenant une chambre de forme allongée, délimitée par une paroi interne, et un piston à déformation élastique comprenant un conteneur dans ladite chambre à déplacer de manière étanche par rapport à cette chambre au moins entre des première et seconde positions longitudinales de la chambre. Cette dernière présente des sections transversales de différentes zones de section transversale au niveau de ses première et seconde positions longitudinales et différentes zones de section transversales de façon au moins sensiblement continue au niveau des positions longitudinales intermédiaires situées entre les première et seconde positions longitudinales de ladite chambre. La zone de section transversale au niveau de la première position longitudinale présente une dimension supérieure à la zone de section transversale au niveau de la seconde position longitudinale. Ledit piston comporte un corps et un moyen d'étanchéité supporté par le corps du piston servant à assurer une étanchéité sur la paroi interne de la chambre. Ce corps de piston est conçu pour s'adapter lui-même et adapter le moyen d'étanchéité aux différentes zones de section transversale de ladite chambre pendant les mouvements relatifs du piston entre la seconde position longitudinale et la première position longitudinale de la chambre, en passant par des positions longitudinales intermédiaires.

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