NON-CONTACT CONTROLLED MICROPUMP

摘要

An implantable micropump comprises a refillable chamber (5) for pharmaceutical liquid, a bellows (1) which is expanded by air or gas so as to urge liquid from the chamber (5), and a valve (6). The valve (6) is controllable by a remotely actuated electromagnet (9). The micropump can also include a pressure-regulating valve inwhich the valve member is urged towards a valve seal by a first elastic force, and is urged away from the valve seat to allow passage of liquid in response to pressure on a diaphragm on the downstream side dropping below a predetermined value.