Medical Injection Device With Gas Evacuation

Abstract: An injection device for injecting into a medical tubing a medical liquid from a medical liquid container, said injection device comprising a body, a piston (6) arranged in the body for travelling along the longitudinal direction, said piston (6), an evacuation path traversing the piston (6), and a float (24) configured for floating on the medical liquid and configured for travelling within a cavity (36) along the longitudinal direction between a blocking configuration in which an obturating part (24a) of the float (24) obturates the passage (38) of the evacuation path, thereby closing the evacuation path, and an open configuration in which the obturating part 24a of the float (24) is spaced apart from the passage (38), thereby letting open the evacuation path, wherein the float (24) has a metacenter (M) which is spaced apart from the top of the obturating part (24a) by a distance less than one third of the height of the float (24).

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