Centrifugal blood pump
First Claim
Patent Images
1. A disposable pumping unit adapted to pump biological fluid such as blood, the pumping unit comprising:
- a pump housing having a pumping chamber therein, and having an inlet and an outlet communicating with the pumping chamber;
a stator having a proximal end and a distal end with the proximal end connected to the pump housing and the distal end extending into the pumping chamber, the stator defining a central axis;
a bearing supported at the distal end of the stator and aligned with the central axis;
a rotator positioned within the pumping chamber and supported on the bearing for rotation about the central axis, the rotator having a hub and a plurality of openings configured to expose the bearing to the fluid; and
magnetic means carried by the rotator within the pumping chamber.
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Accused Products
Abstract
A disposable pumping unit has a pump housing which encloses a pumping chamber therein. The pump housing includes an inlet and an outlet communicating with the pumping chamber. A stator is connected to the pump housing and has a distal end which extends into the pumping chamber. The stator defines a central axis. A bearing is supported at the distal end of the stator and is aligned with the central axis. Positioned within the pumping chamber is a rotator supported on the bearing for rotation about the central axis. At least one magnet is carried by the rotator.
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Citations
45 Claims
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1. A disposable pumping unit adapted to pump biological fluid such as blood, the pumping unit comprising:
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a pump housing having a pumping chamber therein, and having an inlet and an outlet communicating with the pumping chamber; a stator having a proximal end and a distal end with the proximal end connected to the pump housing and the distal end extending into the pumping chamber, the stator defining a central axis; a bearing supported at the distal end of the stator and aligned with the central axis; a rotator positioned within the pumping chamber and supported on the bearing for rotation about the central axis, the rotator having a hub and a plurality of openings configured to expose the bearing to the fluid; and magnetic means carried by the rotator within the pumping chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A centrifugal pump adapted to pump biological fluid such as blood, the pump comprising:
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a pump housing having a pumping chamber therein, and having an inlet and an outlet communicating with the pumping chamber; a stator having a proximal end and a distal end with the proximal end connected to the pump housing and the distal end extending into the pumping chamber, the stator defining a central axis; a bearing supported at the distal end of the stator and being aligned with the central axis; a rotator positioned within the pumping chamber and supported on the bearing for rotation about the central axis, the rotator having a hub and a plurality of openings configured to expose the bearing to the fluid; magnetic means carried by the rotator; and magnetic drive means for releasable connection to the pump housing to communicate with the magnetic means carried by the rotator and thereby to rotate the rotator within the pumping chamber. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A disposable pumping unit adapted to be releasably mounted on a magnetic drive means for pumping biological fluid such as blood, the pumping unit comprising:
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a pump housing having a pumping chamber therein, and an inlet and an outlet communicating with the pumping chamber; a bearing supported in the pumping chamber; an impeller positioned within the pumping chamber, the impeller having a hub rotatably supported on the bearing for rotation about an axis and having a plurality of openings configured to expose the bearing to the fluid; and magnetic means carried by the impeller within the pumping chamber adapted to be magnetically coupled with a magnetic drive means to rotate the impeller, and thereby pump fluid through the pumping unit. - View Dependent Claims (39, 40, 41, 42)
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43. A disposable pumping unit adapted to pump biological fluid such as blood, the pumping unit comprising:
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a pump housing having a pumping chamber therein, and an inlet and an outlet communicating with the pumping chamber; a bearing supported in the pumping chamber; an impeller positioned within the pumping chamber, the impeller having a periphery, a plurality of radial blades which extend to the periphery and a hub which is rotatably supported on the bearing for rotation about an axis and is positioned between the inlet and the bearing, the radial blades defining a plurality of openings configured to expose the bearing to incoming fluid from the inlet; magnetic means carried by the impeller about the periphery and forming magnetic lines of force which intersect the axis of rotation of the impeller such that resulting balanced and unbalanced forces on the impeller stabilize rotation about the bearing and the axis. - View Dependent Claims (44, 45)
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Specification