A portable infusion pump assembly utilizing continuous drive propulsion means (8) to effect automatic and incremental displacement of a plunger (5) within a disposable syringe (3) so as to deliver accurately repeatable volumes of fluid from the syringe (3) over a predetermined period of time....http://www.google.es/patents/US4919650?utm_source=gb-gplus-sharePatente US4919650 - Infusion pump
