Patent ID: 6280421
Filing Date: 2001-08-28
Classification: A61M

Abstract:
An auto-injection device for administering a product, comprising:a) a housing;b) a container having an outlet and carrying a needle at said outlet, the container being shiftably accommodated by the housing; andc) a driven member of a drive unit operably coupled to the housing, the driven member being shiftably accommadated by the housing wherein, during an auto-injection, the driven member advances the container to a predetermined frontal position in relation to the housing, and advances a piston within the container for dispensing of the product, wherein the driven member remains uncoupled with the piston, and coupled with the container until the container reaches the predetermined frontal position, and upon the container reaching the predetermined frontal position, the driven member becomes decoupled from the container and becomes coupled with the piston for advancement of the piston within the container.