Patent ID: 9050405
Filing Date: 2015-06-09
Classification: A61M,F04D

Abstract:
1. A rotary blood pump comprising: a housing defining a pump chamber; and an impeller rotatable on a rotation axis within said pump chamber, said impeller having a hollow interior cavity defined by a cylindrical perimeter wall surface, and a plurality of spaced apart polyhedron bodies within said interior cavity each extending radially inwardly from said perimeter wall surface and having a surface area facing the rotation axis of said impeller, said polyhedron bodies being positioned to enable balanced rotation of said impeller, selected polyhedron bodies comprising one or more openings formed in predetermined surface areas thereof and configured substantially to equalize the weight thereof, the impeller further including a base covering the interior cavity such that the polyhedron bodies and the openings therein are enclosed within the interior cavity covered by the base.