A pump assembly and estimation and control system therefor, the pump adapted for continuous flow pumping of blood. In a particular form, the pump is a centrifugal pump wherein the impeller is entirely sealed within the pump housing and is exclusively hydrodynamically suspended therein against movement...http://www.google.fr/patents/US20050025630?utm_source=gb-gplus-shareBrevet US20050025630 - Rotary blood pump and control system therefor
