Patent ID: 7931626
Filing Date: 2011-04-26
Classification: A61M,Y10S

Abstract:
1. A device for administering an injectable product, comprising: a) a base section; b) a container arranged in the base section from which container a product dose is dispensed through a needle attached to the container by displacement of a piston associated with the container; c) a drive unit, comprising a driven member and a drive element, the drive element applying a drive force on said driven member upon actuating the drive unit, by which drive force said driven member is displaced in the direction of the piston, thus advancing said piston within said container; d) a stripper carried on the device, said stripper movable back and forth in a longitudinal direction of the needle in order to strip off a needle safety cap applied to the needle, said stripper carried on the device in such a way as to allow said stripper to remain on the device during an injection and to be pushed back for insertion of said needle; and e) a means for generating a damping force, the damping force interacting with the drive force and counter forces related to use of the device, wherein a contact pressure element is provided for generating the damping force, which transmits a clamping force between said driven member and a counter element, said contact pressure element comprising a pliable ring arranged in a gap formed between said driven member and said counter element, wherein one of said driven member and said counter element provides a contact pressure surface for said pliable ring, and as the gap between said driven member and said counter element widens in a forward direction of said driven member during the course of advancement of said driven member, the clamping force decreases.