Patent ID: 7749195
Filing Date: 2010-07-06
Classification: A61M

Abstract:
1. A device for administering an injectable product, comprising: an outer casing; a drive sleeve positioned within the outer casing and axially movable with respect to the outer casing; a first pressure element for driving the drive sleeve distally with respect to the outer casing; a piston drive member positioned within the drive sleeve and axially movable with respect to the drive sleeve; a second pressure element for driving the piston drive member distally within the drive sleeve; a piston for acting on the injectable product when acted upon by the piston drive member; and a trigger configured to establish a releasable engagement with the piston drive member in a proximal position prior to operation of the device, wherein activation of the trigger releases the engagement between piston drive member and the trigger, thereby triggering distal movement of the drive sleeve from an initial position to a needle insertion position by the first pressure element and triggering distal movement of the piston drive member by the second pressure element to drive the piston, wherein the piston drive member is at rest relative to the drive sleeve until the drive sleeve has reached the needle insertion position.