A portable pumping system provides insulin or other drugs to a user. A shape memory element is used to actuate the pump and an intelligent system controls the actuator in order to minimize stresses within the system and provide accurate and reliable dosage delivery. The control system utilizes various...http://www.google.com/patents/US8047811?utm_source=gb-gplus-sharePatent US8047811 - Variable volume, shape memory actuated insulin dispensing pump
