Patent ID: 6106501
Filing Date: 2000-08-22
Classification: A61M

Abstract:
A transmission for an injection device for injecting an amount of liquid from a container equipped with a piston, the container being attachable to and detachable from the transmission, the transmission having home, end and intermediate positions and comprising:a transmission sleeve having a generally central longitudinal axis;a drive member comprising a guide button and a carrier sleeve fixedly attached to the guide button, said drive member being disposed rotatably and axially shiftably in the transmission sleeve,a driven member comprising a threaded rod and a flange, said threaded rod disposed nonrotatably and axially shiftably in the transmission sleeve, said driven member being shiftable axially in the transmission sleeve over a distance under the influence of the drive member executing axial shifts,a transmission element being screwably disposed on the threaded rod whereby the driven member is moved axially by the drive member, said transmission element shiftible axially with respect to the drive member, anda lock for locking the transmission in the end position, said lock operatively coupling the transmission sleeve and the drive member, whereby said lock engages and secures said drive member against rotation and axial shifting.