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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10570904 B1

PDFFull Text
Date of Patent:
Feb. 25, 2020

Filed:

Apr. 12, 2018

Reducing centrifugal pump bearing wear through dynamic magnetic coupling

Applicant:

Medtronic, Inc., Minneapolis, MN (US);

Inventors:

Roger A. Naidyhorski, Minneapolis, MN (US);

Brian J. Steffens, Minneapolis, MN (US);

Craig D. Petersen, Minneapolis, MN (US);

Assignee:

Medtronic, Inc., Minneapolis, MN (US);

Attorney:

Dicke, Billig & Czaja, PLLC

Primary Examiner:

Alexander B Comley

Int. Cl.
CPC ...
F04D 13/02 (2006.01); F04D 27/00 (2006.01); F04D 25/02 (2006.01); F04D 29/042 (2006.01); F04D 13/06 (2006.01); F04D 29/041 (2006.01); F04D 15/00 (2006.01); F04D 29/60 (2006.01); F04D 29/22 (2006.01); A61M 1/10 (2006.01); F04D 1/00 (2006.01);
U.S. Cl.
CPC ...
F04D 13/027 (2013.01); F04D 13/024 (2013.01); F04D 13/06 (2013.01); F04D 13/064 (2013.01); F04D 15/0027 (2013.01); F04D 25/026 (2013.01); F04D 27/002 (2013.01); F04D 29/041 (2013.01); F04D 29/042 (2013.01); A61M 1/101 (2013.01); A61M 1/1012 (2014.02); A61M 1/1013 (2014.02); A61M 1/1015 (2014.02); A61M 1/1036 (2014.02); A61M 1/1086 (2013.01); A61M 2205/3334 (2013.01); F04D 1/00 (2013.01); F04D 13/026 (2013.01); F04D 29/22 (2013.01); F04D 29/605 (2013.01);
Abstract

A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.

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