A device for delivering fluid to a patient, including an exit port assembly adapted to connect to a transcutaneous patient access tool, a reservoir including a side wall extending towards an outlet connected to the exit port assembly, at least one threaded lead screw received in the reservoir and extending...http://www.google.de/patents/US20030055380?utm_source=gb-gplus-sharePatent US20030055380 - Plunger for patient infusion device
