IP Library › Granted Patent US 12,383,725
Granted Patent B2
US 12,383,725 · App. 17/205,336 · Granted Aug 12, 2025

Bearingless implantable blood pump

Inventors: Thomas Nyikos (Zurich, CH); Bernhard Warberger (Zurich, CH)
Assignee: TC1 LLC
A61M60/422A61M60/148A61M60/178A61M60/216A61M60/538A61M60/81A61M60/857
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Quick Facts
Patent No.
US 12,383,725
App. No.
17/205,336
Granted
Aug 12, 2025
Kind
B2
Abstract

Implantable blood pumps and related methods employ a compact rotary motor. The compact rotary motor includes a stator and a rotor. The stator is disposed within a housing circumferentially about a dividing wall such that a blood flow conduit extends through the stator. The stator is disposed circumferentially around at least a portion of the rotor.

Claims (30)

1. An implantable blood pump comprising:

a housing defining an inlet opening, an outlet opening, and a dividing wall within the housing defining a blood flow passage that extends between the inlet opening and the outlet opening;

a rotary motor including a stator and a rotor; wherein the stator comprises a stator core and stator coils, wherein the stator core has a toroidally-shaped external surface that extends circumferentially and continuously around an axis of rotation of the rotor, wherein each of the stator coils is wound around and encloses a respective circumferentially extending segment of the toroidally-shaped external surface, wherein each of the stator coils is separated from each of two adjacent instances of the stator coils by an intervening gap that corresponds to a respective exposed circumferentially extending segment of the toroidally-shaped external surface, wherein the stator is disposed within the housing circumferentially about the dividing wall such that the blood flow passage extends through the stator core, wherein the stator core is disposed circumferentially around at least a portion of the rotor, wherein the rotor includes a rotor magnet for driving the rotor, and wherein the stator core overlaps the rotor magnet with respect to the axis of rotation of the rotor; and

control electronics disposed within the housing and configured to control current passing through each of the stator coils to radially levitate the rotor and rotate the rotor within the blood flow passage.

2. The implantable blood pump of claim 1 , wherein the outlet opening is oriented at an angle relative to the inlet opening.

3. The implantable blood pump of claim 1 , wherein the rotor comprises centrifugal pump impeller blades.

4. The implantable blood pump of claim 3 , wherein the rotor defines a rotor blood flow passage extending through the rotor.

5. The implantable blood pump of claim 1 , wherein the rotor defines a rotor blood flow passage extending through the rotor.

6. The implantable blood pump of claim 1 , wherein the rotor has only one magnetic moment.

7. The implantable blood pump of claim 1 , wherein an axial position of the rotor along the blood flow passage is restrained via passive magnetic interaction between the rotor and the stator.

8. The implantable blood pump of claim 1 , wherein the rotor and the dividing wall are separated by a distance in a range from 0.2 mm to 2 mm with the rotor centered relative to the stator core.

9. The implantable blood pump of claim 1 , wherein the rotor and at least one of the stator coils are separated by a distance in a range from 0.3 mm to 2.4 mm with the rotor centered relative to the stator core.

10. The implantable blood pump of claim 1 , further comprising hall effect sensors for monitoring an orientation and one or more positions of the rotor relative to the stator.

11. A ventricular assist device comprising:

a housing defining an inlet opening, an outlet opening, and a dividing wall within the housing defining a blood flow passage that extends between the inlet opening and the outlet opening;

a rotary motor including a stator and a rotor; wherein the stator is operable to rotate the rotor around a rotor around a rotor axis of rotation, wherein the stator comprises a stator core and stator coils, wherein the stator core has a toroidally-shaped external surface that extends circumferentially and continuously around the rotor axis of rotation, wherein each of the stator coils is wound around and encloses a respective circumferentially extending segment of the toroidally-shaped external surface, wherein each of the stator coils is separated from each of two adjacent instances of the stator coils by an intervening gap that corresponds to a respective exposed circumferentially extending segment of the toroidally-shaped external surface, wherein the stator does not extend beyond a disk-shaped volume having a thickness in a direction parallel to the rotor axis of rotation of less than 1.0 inches, wherein the stator is disposed within the housing circumferentially about the dividing wall such that the blood flow passage extends through the stator core, wherein the stator core is disposed circumferentially around at least a portion of the rotor, wherein the rotor includes a rotor magnet for driving the rotor, and wherein the stator core axially overlaps the rotor magnet with respect to the rotor axis of rotation; and

control electronics disposed within the housing and configured to control current supplied to the stator to radially levitate the rotor and rotate the rotor within the blood flow passage.

12. The ventricular assist device of claim 11 , wherein:

a housing comprising an inlet cannula and a first side face from which the inlet cannula extends;

the inlet cannula is configured to couple with a ventricular cuff attached to a heart and extend into a ventricle of the heart; and

the housing extends by a maximum distance of 1.5 inches from the first side face in a direction away from the inlet cannula.

13. The ventricular assist device of claim 11 , wherein the outlet opening is oriented at an angle relative to the inlet opening.

14. The ventricular assist device of claim 11 , wherein the rotor comprises centrifugal pump impeller blades.

15. The ventricular assist device of claim 14 , wherein the rotor defines a rotor blood flow passage extending through the rotor.

16. The ventricular assist device of claim 11 , wherein the rotor defines a rotor blood flow passage extending through the rotor.

17. The ventricular assist device of claim 11 , wherein the rotor has only one magnetic moment.

18. The ventricular assist device of claim 11 , wherein an axial position of the rotor along the blood flow passage is restrained via passive magnetic interaction between the rotor and the stator.

19. The ventricular assist device of claim 11 , wherein the rotor and the dividing wall are separated by a distance in a range from 0.2 mm to 2 mm with the rotor centered relative to the stator core.

20. The ventricular assist device of claim 11 , wherein the rotor and the stator are separated by a distance in a range from 0.3 mm to 2.4 mm with the rotor centered relative to the stator core.

21. The ventricular assist device of claim 11 , further comprising hall effect sensors for monitoring an orientation and one or more positions of the rotor relative to the stator.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 18, 2021
From: NYIKOS, THOMAS; WARBERGER, BERNHARD
To: TC1 LLC
Reel/Frame 055640/0609 →
Continuity (3)
Continuation 16204015 · Nov 29, 2018
Provisional Application 62615708 · Jan 10, 2018
Related Publication 20210205600A1 · Jul 8, 2021
References Cited (251)
US 845816A · Prindle · 1907 [cited by applicant]
US 888654A · Prindle · 1908 [cited by applicant]
US 1026101A · Marsh · 1912 [cited by applicant]
US 2128988A · Russell · 1938 [cited by applicant]
US 2747512A · Paul · 1956 [cited by applicant]
US 2864552A · Norman · 1958 [cited by applicant]
US 3005117A · Buchhold · 1961 [cited by applicant]
US 3066849A · Beams · 1962 [cited by applicant]
US 3122101A · Baker et al. · 1964 [cited by applicant]
US 3225608A · Ivan · 1965 [cited by applicant]
US 3401640A · John et al. · 1968 [cited by applicant]
US 3499274A · Fergason · 1970 [cited by applicant]
US 3575536A · Jacobs et al. · 1971 [cited by applicant]
US 3597022A · Waldron · 1971 [cited by applicant]
US 3608088A · Dorman et al. · 1971 [cited by applicant]
US 3611815A · Fischell · 1971 [cited by applicant]
US 3647324A · Rafferty et al. · 1972 [cited by applicant]
US 3650581A · Boden et al. · 1972 [cited by applicant]
US 3938913A · Isenberg et al. · 1976 [cited by applicant]
US 3957389A · Rafferty et al. · 1976 [cited by applicant]
US 4082376A · Wehde et al. · 1978 [cited by applicant]
US 4135253A · Reich et al. · 1979 [cited by applicant]
US 4213207A · Wilson · 1980 [cited by applicant]
US 4340260A · Forster et al. · 1982 [cited by applicant]
US 4382199A · Isaacson · 1983 [cited by applicant]
US 4398773A · Boden et al. · 1983 [cited by applicant]
US 4405286A · Studer · 1983 [cited by applicant]
US 4408966A · Maruyama · 1983 [cited by applicant]
US 4475866A · Kambe et al. · 1984 [cited by applicant]
US 4507048A · Belenger et al. · 1985 [cited by applicant]
US 4589822A · Clausen et al. · 1986 [cited by applicant]
US 4642036A · Young · 1987 [cited by applicant]
US 4688998A · Olsen et al. · 1987 [cited by applicant]
US 4704121A · Moise · 1987 [cited by applicant]
US 4763032A · Bramm et al. · 1988 [cited by applicant]
US 4779614A · Moise · 1988 [cited by applicant]
US 4844707A · Kletschka · 1989 [cited by applicant]
US 4876492A · Lester et al. · 1989 [cited by applicant]
US 4878831A · Ewing · 1989 [cited by applicant]
US 4929158A · Girault · 1990 [cited by applicant]
US 4944748A · Bramm et al. · 1990 [cited by applicant]
US 4957504A · Chardack · 1990 [cited by applicant]
US 5044897A · Dorman · 1991 [cited by examiner]
US 5055005A · Kletschka · 1991 [cited by applicant]
US 5078741A · Bramm et al. · 1992 [cited by applicant]
US 5079467A · Dorman · 1992 [cited by applicant]
US 5098256A · Smith · 1992 [cited by applicant]
US 5106273A · Lemarquand et al. · 1992 [cited by applicant]
US 5112200A · Isaacson et al. · 1992 [cited by applicant]
US 5112202A · Oshima et al. · 1992 [cited by applicant]
US 5126612A · Girault · 1992 [cited by applicant]
US 5127792A · Katsuta et al. · 1992 [cited by applicant]
US 5159219A · Chu et al. · 1992 [cited by applicant]
US 5177387A · Mcmichael et al. · 1993 [cited by applicant]
US 5195877A · Kletschka · 1993 [cited by applicant]
US 5220232A · Rigney, II et al. · 1993 [cited by applicant]
US 5341059A · Fukuyama et al. · 1994 [cited by applicant]
US 5360317A · Clausen et al. · 1994 [cited by applicant]
US 5385581A · Bramm et al. · 1995 [cited by applicant]
US 5470208A · Kletschka · 1995 [cited by applicant]
US 5678306A · Bozeman, Jr. et al. · 1997 [cited by applicant]
US 5695471A · Wampler · 1997 [cited by applicant]
US 5708346A · Schob · 1998 [cited by applicant]
US 5725357A · Nakazeki et al. · 1998 [cited by applicant]
US 5798454A · Nakazeki et al. · 1998 [cited by applicant]
US 5808437A · Schob · 1998 [cited by applicant]
US 5888242A · Antaki et al. · 1999 [cited by applicant]
US 5917297A · Gerster et al. · 1999 [cited by applicant]
US 5928131A · Prem · 1999 [cited by applicant]
US 5947703A · Nojiri et al. · 1999 [cited by applicant]
US 6053705A · Schob et al. · 2000 [cited by applicant]
US 6071093A · Hart · 2000 [cited by applicant]
US 6100618A · Schoeb et al. · 2000 [cited by applicant]
US 6116862A · Rau et al. · 2000 [cited by applicant]
US 6130494A · Schob · 2000 [cited by applicant]
US 6146325A · Lewis et al. · 2000 [cited by applicant]
US 6186665B1 · Maher et al. · 2001 [cited by applicant]
US 6222290B1 · Schoeb et al. · 2001 [cited by applicant]
US 6227797B1 · Watterson et al. · 2001 [cited by applicant]
US 6234772B1 · Wampler et al. · 2001 [cited by applicant]
US 6249067B1 · Schob et al. · 2001 [cited by applicant]
US 6264635B1 · Wampler et al. · 2001 [cited by applicant]
US 6278251B1 · Schob · 2001 [cited by applicant]
US 6293901B1 · Prem · 2001 [cited by applicant]
US 6302661B1 · Khanwilkar et al. · 2001 [cited by applicant]
US 6351048B1 · Schob et al. · 2002 [cited by applicant]
US 6355998B1 · Schoeb et al. · 2002 [cited by applicant]
US 6394769B1 · Beamson et al. · 2002 [cited by applicant]
US 6447266B2 · Antaki et al. · 2002 [cited by applicant]
US 6468041B2 · Ozaki · 2002 [cited by applicant]
US 6547530B2 · Ozaki et al. · 2003 [cited by applicant]
US 6559567B2 · Schoeb · 2003 [cited by applicant]
US 6575717B2 · Ozaki et al. · 2003 [cited by applicant]
US 6589030B2 · Ozaki · 2003 [cited by applicant]
US 6605032B2 · Benkowski et al. · 2003 [cited by applicant]
US 6623475B1 · Siess · 2003 [cited by applicant]
US 6626644B2 · Ozaki · 2003 [cited by applicant]
US 6634224B1 · Schob et al. · 2003 [cited by applicant]
US 6640617B2 · Schob et al. · 2003 [cited by applicant]
US 6641378B2 · Davis et al. · 2003 [cited by applicant]
US 6688861B2 · Wampler · 2004 [cited by applicant]
US 6707200B2 · Carroll et al. · 2004 [cited by applicant]
US 6711943B1 · Schob · 2004 [cited by applicant]
US 6817836B2 · Nose et al. · 2004 [cited by applicant]
US 6949066B2 · Beamson et al. · 2005 [cited by applicant]
US 6991595B2 · Burke et al. · 2006 [cited by applicant]
US 7070398B2 · Olsen et al. · 2006 [cited by applicant]
US 7112903B1 · Schob · 2006 [cited by applicant]
US 7138776B1 · Gauthier et al. · 2006 [cited by applicant]
US 7150711B2 · Nusser et al. · 2006 [cited by applicant]
US D534548S · Urano et al. · 2007 [cited by applicant]
US 7160242B2 · Yanai · 2007 [cited by applicant]
US 7229258B2 · Wood et al. · 2007 [cited by applicant]
US 7229474B2 · Hoffmann et al. · 2007 [cited by applicant]
US 7239098B2 · Masino · 2007 [cited by applicant]
US 7284956B2 · Nose et al. · 2007 [cited by applicant]
US 7338521B2 · Antaki et al. · 2008 [cited by applicant]
US 7462019B1 · Allarie et al. · 2008 [cited by applicant]
US 7497116B2 · Miyakoshi et al. · 2009 [cited by applicant]
US 7511443B2 · Townsend et al. · 2009 [cited by applicant]
US 7578782B2 · Miles et al. · 2009 [cited by applicant]
US 7591777B2 · LaRose · 2009 [cited by applicant]
US 7645225B2 · Medvedev et al. · 2010 [cited by applicant]
US 7699586B2 · LaRose et al. · 2010 [cited by applicant]
US 7699588B2 · Mendler · 2010 [cited by applicant]
US 7854631B2 · Townsendl et al. · 2010 [cited by applicant]
US 7861582B2 · Miyakoshi et al. · 2011 [cited by applicant]
US 7887479B2 · LaRose et al. · 2011 [cited by applicant]
US 7893644B2 · Townsend et al. · 2011 [cited by applicant]
US 7951062B2 · Morello · 2011 [cited by applicant]
US 7976271B2 · LaRose et al. · 2011 [cited by applicant]
US 7997854B2 · LaRose et al. · 2011 [cited by applicant]
US 8007254B2 · LaRose et al. · 2011 [cited by applicant]
US 8152493B2 · LaRose et al. · 2012 [cited by applicant]
US 8157720B2 · Marseille et al. · 2012 [cited by applicant]
US 8303482B2 · Schima et al. · 2012 [cited by applicant]
US 8323174B2 · Jeevanandam et al. · 2012 [cited by applicant]
US 8382830B2 · Maher et al. · 2013 [cited by applicant]
US 8419609B2 · Laorse et al. · 2013 [cited by applicant]
US 8449444B2 · Poirier · 2013 [cited by applicant]
US 8506470B2 · LaRose et al. · 2013 [cited by applicant]
US 8506471B2 · Bourque · 2013 [cited by applicant]
US 8517699B2 · Horvath · 2013 [cited by applicant]
US 8556795B2 · Bolyard et al. · 2013 [cited by applicant]
US 8562508B2 · Dague et al. · 2013 [cited by applicant]
US 8581462B2 · Nussbaumer · 2013 [cited by applicant]
US 8597350B2 · Rudser et al. · 2013 [cited by applicant]
US 8652024B1 · Yanai et al. · 2014 [cited by applicant]
US 8657733B2 · Ayre et al. · 2014 [cited by applicant]
US 8668473B2 · LaRose et al. · 2014 [cited by applicant]
US 8764621B2 · Badstibner et al. · 2014 [cited by applicant]
US 8852072B2 · White et al. · 2014 [cited by applicant]
US 8864643B2 · Reichenbach et al. · 2014 [cited by applicant]
US 8870739B2 · LaRose et al. · 2014 [cited by applicant]
US 8882477B2 · Fritz, IV et al. · 2014 [cited by applicant]
US 8882744B2 · Dormanen et al. · 2014 [cited by applicant]
US 8956275B2 · Bolyard et al. · 2015 [cited by applicant]
US 9068572B2 · Ozaki et al. · 2015 [cited by applicant]
US 9079043B2 · Stark et al. · 2015 [cited by applicant]
US 9091271B2 · Bourque · 2015 [cited by applicant]
US 9091272B2 · Kim et al. · 2015 [cited by applicant]
US 9265870B2 · Reichenbach et al. · 2016 [cited by applicant]
US 9382908B2 · Ozaki et al. · 2016 [cited by applicant]
US 9427510B2 · Siebenhaar · 2016 [cited by examiner]
US 9492599B2 · Schimpf · 2016 [cited by examiner]
US 9675741B2 · Bourque · 2017 [cited by applicant]
US 10973967B2 · Nyikos · 2021 [cited by examiner]
US 20020105241A1 · Carroll et al. · 2002 [cited by applicant]
US 20030021683A1 · Capone et al. · 2003 [cited by applicant]
US 20040236420A1 · Yamane et al. · 2004 [cited by applicant]
US 20050004421A1 · Pacella et al. · 2005 [cited by applicant]
US 20050025630A1 · Ayre et al. · 2005 [cited by applicant]
US 20050071001A1 · Jarvik · 2005 [cited by applicant]
US 20050135948A1 · Olsen et al. · 2005 [cited by applicant]
US 20050147512A1 · Chen et al. · 2005 [cited by applicant]
US 20060122456A1 · LaRose · 2006 [cited by examiner]
US 20070100196A1 · LaRose · 2007 [cited by examiner]
US 20090064755A1 · Fleischli et al. · 2009 [cited by applicant]
US 20090234447A1 · Larose et al. · 2009 [cited by applicant]
US 20100130809A1 · Morello · 2010 [cited by applicant]
US 20100150749A1 · Horvath · 2010 [cited by applicant]
US 20100152526A1 · Pacella et al. · 2010 [cited by applicant]
US 20100241223A1 · Lee et al. · 2010 [cited by applicant]
US 20100327687A1 · Iannello et al. · 2010 [cited by applicant]
US 20110002794A1 · Haefliger et al. · 2011 [cited by applicant]
US 20110031836A1 · Nussbaumer · 2011 [cited by applicant]
US 20110054239A1 · Sutton et al. · 2011 [cited by applicant]
US 20110071337A1 · Thompson et al. · 2011 [cited by applicant]
US 20110144413A1 · Foster · 2011 [cited by examiner]
US 20110187217A1 · Nussbaumer · 2011 [cited by applicant]
US 20110237863A1 · Ricci et al. · 2011 [cited by applicant]
US 20110245582A1 · Zafirelis et al. · 2011 [cited by applicant]
US 20110313237A1 · Miyakoshi et al. · 2011 [cited by applicant]
US 20120035411A1 · LaRose et al. · 2012 [cited by applicant]
US 20120046514A1 · Bourque · 2012 [cited by examiner]
US 20120059212A1 · LaRose et al. · 2012 [cited by applicant]
US 20120134832A1 · Wu · 2012 [cited by applicant]
US 20120226097A1 · Smith et al. · 2012 [cited by applicant]
US 20120245680A1 · Masuzawa et al. · 2012 [cited by applicant]
US 20120245681A1 · Casas et al. · 2012 [cited by applicant]
US 20120253103A1 · Robert · 2012 [cited by applicant]
US 20120310036A1 · Peters et al. · 2012 [cited by applicant]
US 20130164161A1 · Schob · 2013 [cited by examiner]
US 20130314047A1 · Eagle et al. · 2013 [cited by applicant]
US 20130331934A1 · Kabir et al. · 2013 [cited by applicant]
US 20130345492A1 · Pfeffer et al. · 2013 [cited by applicant]
US 20140030122A1 · Ozaki et al. · 2014 [cited by applicant]
US 20140062239A1 · Schoeb · 2014 [cited by examiner]
US 20140100413A1 · Casas et al. · 2014 [cited by applicant]
US 20140194985A1 · Vadala, Jr. · 2014 [cited by applicant]
US 20140275723A1 · Fritz, IV et al. · 2014 [cited by applicant]
US 20140303426A1 · Kerkhoffs et al. · 2014 [cited by applicant]
US 20140357937A1 · Reyes et al. · 2014 [cited by applicant]
US 20140364768A1 · Hastie et al. · 2014 [cited by applicant]
US 20150051438A1 · Taskin · 2015 [cited by applicant]
US 20150151031A1 · Yaghdjian · 2015 [cited by applicant]
US 20150211542A1 · Scheckel · 2015 [cited by applicant]
US 20150273125A1 · Bourque · 2015 [cited by applicant]
US 20150294550A1 · Kimball · 2015 [cited by examiner]
US 20160331881A1 · Siebenhaar et al. · 2016 [cited by applicant]
US 20170119946A1 · Mcchrystal et al. · 2017 [cited by applicant]
US 20170246365A1 · Bourque · 2017 [cited by applicant]
US 20170302145A1 · Holenstein et al. · 2017 [cited by applicant]
CN 300837668 · 2008 [cited by applicant]
EP 150320 · 1990 [cited by applicant]
EP 60569 · 1990 [cited by applicant]
EP 378251 · 1994 [cited by applicant]
EP 2357374 · 2011 [cited by applicant]
GB 1491710 · 1977 [cited by applicant]
JP 01257792 · 1989 [cited by applicant]
JP 02016390 · 1990 [cited by applicant]
JP 03088996 · 1991 [cited by applicant]
JP 04148095 · 1992 [cited by applicant]
JP 2000510929 · 2000 [cited by applicant]
JP 2002512333 · 2002 [cited by applicant]
JP 2003093500 · 2003 [cited by applicant]
JP 2011530315 · 2011 [cited by applicant]
WO 9953974 · 1999 [cited by applicant]
WO 2004098677 · 2004 [cited by applicant]
WO 2005032620 · 2005 [cited by applicant]
WO 2006137496 · 2006 [cited by applicant]
WO 2010015836 · 2010 [cited by applicant]
WO 2010023815 · 2010 [cited by applicant]
WO 2010036815 · 2010 [cited by applicant]
WO 2012028181 · 2012 [cited by applicant]
Antaki et al., “PediaFlowTM Maglev Ventricular Assist Device: A Prescriptive Design Approach”, Cardiovascular Engineering and Technology, vol. 1, No. 1, Mar. 2010, pp. 104-121. [cited by applicant]
Barletta et al., “Design of a Bearing Less Blood Pump”, Proc. Third International Symposium on Magnetic Suspension Technology, Jul. 1, 1996, pp. 265-274. [cited by applicant]
Izraelev et al., “A Passively-Suspended Tesla Pump Left Ventricular Assist Device”, NIH Public Access, vol. 55, No. 6, 2009, pp. 556-561. [cited by applicant]
Steinert et al., “Concept of a 150 krpm Bearingless Slotless Disc Drive with Combined Windings”, Proceedings of the IEEE Intemational Electric Machines and Drives Conference (IEMDC 2013), 2013, pp. 311-318. [cited by applicant]
Steinert et al., “Slotless Bearingless Disk Drive for High-Speed and High-Purity Applications”, IEEE Transactions on Industrial Electronics, vol. 61, No. 11, Nov. 2014, pp. 975-981. [cited by applicant]
Steinert et al., “Topology Evaluation of Slotless Bearingless Motorswith Toroidal Windings”, The 2014 International Power Electronics Conference, 2014, pp. 974-981. [cited by applicant]