A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/38 (2006.01) A61J 1/06 (2006.01) A61M 5/00 (2006.01)
Patent
CA 2709330
The invention relates to a dual-chamber injection device comprising a cylinder element (2), a closure element (6), two pistons (3) and (4), and optionally an intermediate piston (3a), characterized in that one or more fluid-tight, gas-permeable membranes (8) and optionally valve membranes (15) are disposed in the wall of the cylinder element (2) or in the closure element (6), through which the gas present in the chambers can escape from the cylinder element (2) when the pistons (3), (3a), and (4) move in the distal direction.
L'invention concerne un système de seringue à deux chambres comportant un élément cylindrique (2), un élément obturateur (6), deux pistons (3, 4) et éventuellement un piston intermédiaire (3a). Le système de seringue est caractérisé en ce que la paroi de l'élément cylindrique (2) ou l'élément obturateur (6) comporte une ou plusieurs membranes étanches aux fluides, perméables aux gaz (8) et éventuellement des membranes soupape (15), aux travers desquelles du gaz contenu dans les chambres peut s'échapper hors de l'élément cylindrique (2) lors du déplacement des pistons (3, 3a, 4) dans la direction distale.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Sanofi-Aventis Deutschland Gmbh
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