| abstract |
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. |