Centrifugal blood pump and magnetic coupling
US5017103A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/128
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A centrifugal blood pump having a pumping chamber provided with an axial inlet and a circumferential outlet and provided with a rotatable impeller having a plurality of radially extending blood propelling vanes. The vanes are configured to each have a blade angle which varies monotonically toward the periphery of the chamber. The pumping chamber is delimited by an impeller housing provided with an opening through which the impeller shaft extends into the chamber, the opening having an outline which conforms closely to the outline of the shaft, and the pump further includes a bearing housing secured to the impeller housing and delimiting a bearing chamber into which the shaft extends; bearings disposed in the bearing chamber and rotatably supporting the shaft; and a seal located in the bearing chamber adjacent the opening and surrounding the shaft to form a fluid seal between the blood pumping chamber and the bearing chamber. The impeller is driven by a plurality of magnetizable plates secured to the impeller and spaced apart about the longitudinal axis, and a rotatable magnetic drive assembly disposed outside of the impeller housing and mounted for rotation about the longitudinal a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.