Patent ID: 7374558
Filing Date: 2008-05-20
Classification: A61M

Abstract:
1. An injection device comprising an injection needle, said injection device comprising: a) a container for an injectable product, comprising an outlet for the product at a front end sealed by a membrane, said front end comprising a container circumference; b) said injection needle, comprising a front needle portion facing away from said container for injecting into tissue and a rear needle portion which in an initial state of the injection device lies opposite and faces said membrane and which is injected through the membrane into the container for an injection; c) a holding body which holds the injection needle in a central needle portion and from which a front needle portion and a rear needle portion project, the holding body projecting radially from the central needle portion and extending along a length that is at least a portion of the length of the rear needle portion, such that a holding body rear chamber is formed around at least a portion of the rear needle portion, the holding body rear chamber comprising a circumference that is larger than the container circumference, such that the front end of said container is insertable into said holding body rear chamber; d) and a hollow-cylindrical outer body which accommodates at least a portion of said holding body rear chamber so as to be movable in an advancing direction in the longitudinal direction of the injection needle, said hollow-cylindrical outer body forming a sterile front chamber for the front needle portion, said front chamber sealed by a septum and pierced by the front needle portion of the injection needle by means of a movement which the holding body performs in the advancing direction, relative to the outer body; e) wherein an outer wall of the holding body rear chamber and an inner wall of the hollow-cylindrical outer body are parallel to the rear needle portion and abut along a length that is at least a portion of the length of the holding body rear chamber, and said walls are slidably coupled along said length, and wherein at least one of the holding body rear chamber and the hollow-cylindrical outer body forms a sterile rear chamber for the rear needle portion, said sterile rear chamber being sealed by a sealing element on its rear side facing away from the front needle portion, said sealing element spanning a sterile chamber circumference that is larger than said container circumference; f) and wherein the front end of the container for piercing the membrane penetrates through the sealing element into the sterile rear chamber.