Rotary blood pump and control system therefor

US6866625B1 · kind B1 · utility

Assignees

• Ventrassist Pty Ltd. · AU
• The Regents of the University of Technology Office of Technology Transfer · US

Inventors

• Peter Ayre · Sydney, AU
• Geoffrey Douglas Tansley · Kegworth, GB
• Peter Andrew Watterson · Sydney, AU
• John Woodard · Hornsby, AU

Key dates

• Filing date: Apr 20, 2000
• Grant date: Mar 15, 2005
• Expiry date: Apr 20, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S415/90
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

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 in three translational and two rotational degrees of freedom as the impeller rotates within the fluid urged by electromagnetic means external to the pump cavity. Hydrodynamic suspension is assisted by the impeller having deformities therein such as blades with surfaces tapered from the leading edges to the trailing edges of bottom and top surfaces thereof.