Abstract: The present invention is a miniature medication pump. With a small lightweight mechanism, operating on low energy consumption, the medication pump device is a highly reliable controlled portable device of drug infusion to patients. The proposed device is comprised of a piezoelectric actuator, operated by a programmable logic means, which applies force on a lever. The lever is situated between two unidirectional stoppers and transfers the force of the actuator onto the front stopper. The front stopper has a grip on the plunger stem and it therefore pushes it in the direction of the syringe and releases controlled amounts of medication to the body of the patient. The invention also include monitoring mechanisms which enable constant and accurate measurements of the amount of medication which is released from the device in actuality. The user of the pump is alerted about detected deviations from the designated flow of the medication.

Abstract: A micro-pump that supplies medication from a reservoir to a patient through a flexible tube is disclosed. The pump, which is especially suitable but not confined to delivering insulin to diabetic patients, is small and light enough to be attached to the body using adhesive plaster or to be strapped to the body in any other manner. In the preferred embodiment the pump mechanism comprises a lead screw, a weak force rotating element, an actuator, and a high force holding element. The device also includes a processing circuitry for controlling and monitoring the drive mechanism, a force sensor to measure medication pressure which generates indicative signals to the processing circuitry, a sensor for tracking the position of the syringe plunger, and a remote control unit.