Patent ID: 6074372
Filing Date: 2000-06-13
Classification: A61M

Abstract:
A drug administration device comprising a housing and a dose setting mechanism, wherein said dose setting mechanism includes:a press button (7) connectable with a piston rod (13) for administration of a set dose from a container,a rotatable dose setting element (5) interconnected with said press button (7),a dose administration wheel (11) connected with said piston rod (13), anda coupling ring (12) connected with the dose setting element (5) and the press button (7) such that rotation of the dose setting element and coupling ring in a first rotational direction moves the press button in one direction, and movement of the press button in an opposite direction rotates said dose settings element and coupling ring in a second rotational direction, wherein one of said dose administration wheel (11) and said coupling ring (12) at least partly surrounds the other, said dose administration wheel (11) and said coupling ring (12) being arranged such that rotation of the dose setting element (5) allows the coupling ring (12) to be rotated in either direction in relation to the dose administration wheel (11), while activation of the press button (7), and thereby rotation of the coupling ring (12), causes the dose administration wheel (11) to be rotated.