Patent ID: 7736344
Filing Date: 2010-06-15
Classification: A61M,Y10T

Abstract:
1. A delivery device for delivering an infusion medium to a user, the device comprising: a disposable housing portion adapted to be secured to a user; a durable housing portion configured to be selectively engaged with and disengaged from the disposable housing portion to allow disposal of the disposable housing portion without disposing of the durable housing portion; a reservoir supported by the disposable housing portion, the reservoir having an interior for containing a fluidic medium and a plunger moveable within the interior of the reservoir along an axial direction of the reservoir; a slide member supported by the durable housing portion, the slide member having an end for engaging the plunger when the disposable housing portion and durable housing portion are engaged, the slide member further having an engagement surface for contacting and engaging a drive surface of a piezoelectric stack drive device; a shaft supported by the durable housing portion, the shaft extending along the engagement surface of the slide member; and a piezoelectric stack drive device supported by the shaft and the piezoelectric stack drive device arranged to be located between the engagement surface of the slide member and the shaft to selectively move the slide member in the axial direction of the reservoir when the disposable housing portion and durable housing portion are engaged; wherein movement of the slide member by operation of the piezoelectric stack drive device is transferred to movement of the plunger in the axial direction of the reservoir, when the slide member is engaged with the plunger.