Reduced thrombosis blood pump
AssigneeBoston Scientific Scimed, Inc.
InventorsBenjamin Breidall, Daniel H. VanCamp, Travis J. Schauer
Life of this patent
Estimating the term…
Abstract
A bearing assembly is configured to retain a distal end of an impeller of a blood pump, where the impeller includes a drive shaft. The bearing assembly includes a pivot member coupled to a distal end of the drive shaft; a distal bearing cup having a proximally-facing surface configured to engage at least a portion of a distal section of the pivot member; and a sleeve bearing disposed around at least a portion of a proximal section of the pivot member.
Claims19
A bearing assembly configured to retain a distal end of an impeller of a blood pump, the impeller having a drive shaft, and the bearing assembly comprising:
- a pivot member coupled to a distal end of the drive shaft;
- a distal bearing cup having a proximally-facing surface configured to engage at least a portion of a distal section of the pivot member;
- a sleeve bearing disposed around at least a portion of a proximal section of the pivot member;
- and
- a silicone dampener disposed around an additional portion of the proximal section of the pivot member.
A blood pump, comprising:
- an impeller;
- a drive shaft disposed at least partially within the impeller;
- a motor configured to drive the impeller;
- a distal bearing assembly configured to receive a distal end of the impeller, the distal bearing assembly comprising:
- a pivot member coupled to a distal end of the drive shaft;
- a distal bearing cup having a proximally-facing surface configured to engage at least a portion of a distal section of the pivot member;
- and a sleeve bearing disposed around at least a portion of a proximal section of the pivot member;
- a proximal bearing assembly configured to retain a proximal end of the impeller of the blood pump, the proximal bearing assembly comprising:
- a thrust plate having a distal-facing surface;
- and an impeller bearing surface configured to engage the entire distal-facing surface;
- and
- a rotor fixed to the proximal end of the impeller, wherein the motor is configured to magnetically drive the rotor, the rotor comprising a cylindrical magnetic rotor having an outer surface that is located a first radial distance from a central axis of the drive shaft, and wherein the impeller hearing surface extends to a second radial distance away from the central axis, wherein the second radial distance is greater than or equal to the first radial distance.
A bearing assembly configured to retain a distal end of an impeller of a blood pump, the impeller having a drive shaft, and the bearing assembly comprising:
- a pivot member coupled to a distal end of the drive shaft;
- a distal bearing cup having a proximally-facing surface configured to engage at least a portion of a distal section of the pivot member;
- and
- a sleeve bearing disposed around at least a portion of a proximal section of the pivot member, and the sleeve bearing terminating apart from the distal cup bearing such that the distal section of the pivot member is disposed between the sleeve bearing and the distal cup bearing.
Dependencies are inferred from the claim text.