Device and autoinjector for administration of an injectable product, useful in drug administration, e.g. for intravenous injection, comprises a housing, a product reservoir, piston, priming mechanism and metering element

摘要

Device for administration of an injectable product comprises: (a) a housing (1); (b) a product reservoir (3); (c) a piston (4) which can be axially traversed in the propulsion direction (V) inside the reservoir for dispensing the product by a discharge stroke; and (d) a priming mechanism (35) which acts on the piston in the propulsion direction. Device for administration of an injectable product comprises: (a) a housing (1); (b) a product reservoir (3); (c) a piston (4) which can be axially traversed in the propulsion direction (V) inside the reservoir for dispensing the product by a discharge stroke; and (d) a priming mechanism (35) which acts on the piston in the propulsion direction, deaerates the reservoir, and can move in the propulsion direction relative to piston rods (11, 12). An independent claim is included for an autoinjector including a spring, and a metering element (25) for controlling the product dose which axially displaces a piston rod.