Patent ID: 9044535
Filing Date: 2015-06-02
Classification: A61M,F04D

Abstract:
1. A blood pump comprising: a disposable pump head having an inlet and an outlet formed in a sealed impeller housing, the pump head further comprising an impeller contained within the sealed impeller housing having a top disk and a bottom disk with impeller blades mounted therebetween, the top and bottom disks having respective magnetic structures; and a re-usable levitation/drive unit having movably coupled upper and lower housing sections, whereby the housing sections are relatively movable to an open position for allowing insertion of the disposable pump head and a closed position for retaining the disposable pump head in a predetermined position, wherein the re-usable levitation/drive unit includes a levitation magnet in one of the housing sections and a drive magnet in the other one of the housing sections; wherein the upper housing section comprises first and second jaw elements each relatively movable with respect to the lower housing section, wherein the levitating magnet is located in the upper housing section and comprises a plurality of magnet segments aligned around a periphery of substantially 360° circumferentially, and wherein the first and second jaw elements comprise unequal portions of the circumferential periphery and include unequal numbers of magnet segments, respectively.