Motor assembly for catheter pump
First Claim
Patent Images
1. A catheter pump, comprising:
- a catheter assembly comprising;
a drive shaft having a proximal end and a distal end;
an impeller coupled with the distal end of the drive shaft; and
a driven magnet assembly coupled with the proximal end of the drive shaft, the driven magnet assembly including a driven magnet housing having a driven magnet;
a drive system comprising;
a motor having an output shaft; and
a drive magnet assembly coupled with the output shaft, the drive magnet assembly including a drive magnet housing with a drive magnet disposed therein; and
a securement device configured to secure the driven magnet housing into engagement with the drive magnet housing during operation of the pump,wherein the drive magnet and the driven magnet at least partially overlap along a rotational axis of the driven magnet.
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Accused Products
Abstract
A catheter pump is disclosed herein. The catheter pump can include a catheter assembly that comprises a drive shaft and an impeller coupled to a distal end of the drive shaft. A driven assembly can be coupled to a proximal end of the drive shaft within a driven assembly housing. The catheter pump can also include a drive system that comprises a motor and a drive magnet coupled to an output shaft of the motor. The drive system can include a drive assembly housing having at least one magnet therein. Further, a securement device can be configured to prevent disengagement of the driven assembly housing from the drive assembly housing during operation of the pump.
447 Citations
43 Claims
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1. A catheter pump, comprising:
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a catheter assembly comprising; a drive shaft having a proximal end and a distal end; an impeller coupled with the distal end of the drive shaft; and a driven magnet assembly coupled with the proximal end of the drive shaft, the driven magnet assembly including a driven magnet housing having a driven magnet; a drive system comprising; a motor having an output shaft; and a drive magnet assembly coupled with the output shaft, the drive magnet assembly including a drive magnet housing with a drive magnet disposed therein; and a securement device configured to secure the driven magnet housing into engagement with the drive magnet housing during operation of the pump, wherein the drive magnet and the driven magnet at least partially overlap along a rotational axis of the driven magnet. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 36, 37, 38)
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7. A catheter pump, comprising:
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a catheter assembly comprising; a drive shaft having a proximal end and a distal end; an impeller coupled with the distal end of the drive shaft; and a driven magnet assembly coupled with the proximal end of the drive shaft, the driven magnet assembly including a driven magnet housing having a driven magnet; a drive system comprising; a motor having an output shaft; and a drive magnet assembly coupled with the output shaft, the drive magnet assembly including a drive magnet housing with a drive magnet disposed therein; and a securement device configured to secure the driven magnet housing into engagement with the drive magnet housing during operation of the pump, wherein one of the driven magnet housing and the drive magnet housing comprises a lateral tab and the other of the drive magnet housing and driven magnet housing comprises an opening configured to receive the lateral tab, the catheter pump having a locked configuration in which the lateral tab prevents axial relative movement and consequent disengagement of the drive magnet housing and the driven magnet housing. - View Dependent Claims (8, 9)
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12. A catheter pump, comprising:
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a catheter assembly comprising; a drive shaft having a proximal end and a distal end; an impeller coupled with the distal end of the drive shaft; and a rotatable magnet coupled with the proximal end, the rotatable magnet being disposed in a driven magnet housing; a drive system comprising a plurality of motor windings configured to induce rotation of the rotatable magnet when the driven magnet housing is engaged with the drive system; and a locking device configured to be engaged by insertion of the driven magnet housing into an opening of the drive system, wherein the rotatable magnet and the motor windings at least partially overlap along a rotational axis of the rotatable magnet. - View Dependent Claims (14, 39, 40)
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13. A catheter pump, comprising:
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a catheter assembly comprising; a drive shaft having a proximal end and a distal end; an impeller coupled with the distal end of the drive shaft; and a rotatable magnet coupled with the proximal end, the rotatable magnet being disposed in a driven magnet housing; a drive system comprising a plurality of motor windings configured to induce rotation of the rotatable magnet when the driven magnet housing is engaged with the drive system; and a locking device configured to be engaged by insertion of the driven magnet housing into an opening of the drive system, wherein the driven magnet housing comprises a generally circular periphery with a lateral projection and the drive system comprises a generally circular aperture with a lateral protrusion, the lateral projection of the driven magnet housing being insertable proximal of the aperture and rotatable relative to the aperture when so inserted such that the lateral projection of the driven magnet housing is circumferentially offset from the lateral protrusion of the aperture.
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15. A catheter pump, comprising:
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a catheter assembly comprising; a drive shaft having a proximal end and a distal end; an impeller coupled with the distal end of the drive shaft; and a rotatable magnet coupled with the proximal end, the rotatable magnet being disposed in a driven magnet housing; a drive system comprising a plurality of motor windings configured to induce rotation of the rotatable magnet when the driven magnet housing is engaged with the drive system; and a locking device configured to be engaged by insertion of the driven magnet housing into an opening of the drive system, wherein a space is provided between the rotatable magnet and the driven magnet housing, the space being in fluid communication with a lumen that can be fluidly coupled with a source of infusate.
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16. A method, comprising:
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inserting a proximal portion of a catheter assembly containing a magnet into a recess of a drive unit; and engaging a locking device to secure the proximal portion of the catheter assembly to the drive unit, the locking device comprising a projection and a locking recess, wherein engaging the locking device comprises providing opposite relative motion between the proximal portion of the catheter assembly and the drive unit until the projection is urged radially into the locking recess to secure the proximal portion of the catheter assembly to the drive unit. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 41, 42, 43)
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24. A catheter assembly, comprising:
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a catheter body having a proximal portion and a distal portion; an impeller coupled to the distal portion of the catheter body; and a tip member positioned distal the impeller, the tip member having a lumen comprising a first section and a second section connected to the first section, the lumen extending through a distal-most end of the catheter assembly, wherein an inner diameter of the first section is larger than an inner diameter of the second section. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification