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US 11,596,783 B2Granted
Blood pressure powered auxiliary pump
AssigneeIndiana University Research and Technology Corporation
InventorMark D. Rodefeld
Life of this patent
Estimating the term…
Abstract
Methods and devices for a self-contained device including a hydraulic motor and a hydraulic pump. Preferably, the motor is incorporated either within the interior of the pump, on the exterior of the pump, or a combination of the two. The pump increases the kinetic energy of the fluid by centrifugal means, and in some embodiments is a viscous impeller pump. Applications include building flow systems, industrial processes, and biological circulatory systems.
Claims49
A device for pumping blood, comprising:
- means for centrifugally pumping blood;
- and
- means for hydraulically powering said pumping means, and said powering means uses blood to generate the power;
- wherein said pumping means rotates about an axis and has a body that includes an internal flowpath, and said hydraulically powering means is placed in the internal flowpath of the body;
- and
- wherein the internal flowpath has an inner surface surrounding the internal flowpath and said hydraulically powering means includes at least one motive conversion feature located on the inner surface.
3 more elements
A device for pumping blood, comprising:
- a hydraulic motor adapted and configured for generating power from a portion of a first supply of blood, said motor having an inlet for receiving the portion of the first blood supply at a first higher pressure and an outlet for expelling the first blood supply at a first lower pressure;
- and
- a centrifugal pump adapted and configured for increasing the kinetic energy of the remainder of the first supply of blood, said pump being powered by said hydraulic motor, wherein the remainder of the first supply of blood at a second reduced pressure less than the first higher pressure is received at an inlet of said pump, and the remainder supply of blood is expelled from an outlet of said pump at a second increased pressure that is greater than the second reduced pressure;
- wherein the portion of the first supply of blood expelled from the motor outlet and the remainder of the first supply of blood expelled from the pump outlet are combined and are recycled to the inlet of said motor and the inlet of said pump;
- wherein said centrifugal pump is supported by a pair of struts and rotatable about an axis, and one said strut provides the portion of the first blood supply at the first higher pressure, and the other said strut receives the portion at the first lower pressure.
2 more elements
A device for pumping blood, comprising:
- a hydraulic motor adapted and configured for generating power from a first supply of blood, said motor having a motor inlet for receiving the first blood supply at a first higher pressure and a motor outlet for expelling the first blood supply at a first lower pressure;
- a rotatable centrifugal pump powered by said hydraulic motor and having a pump inlet and a pump outlet and an outer surface adapted and configured for increasing the kinetic energy of a second supply of blood by rotation of the outer surface, the pump inlet receiving the second supply at a second lower pressure and the second supply flowing from the pump outlet at a second higher pressure;
- and
- wherein flow from the motor outlet at the first lower pressure is in fluid communication with the second supply of blood at the pump outlet at the second higher pressure, and the second lower pressure of the second supply of blood at the pump inlet is less than the first higher pressure of the first supply of blood at the motor inlet;
- wherein said pump rotates about an axis and includes a viscously impelling outer surface shaped as a body of revolution about the axis, the body of revolution having a maximum diameter proximate to the pump outlet;
- wherein said pump includes an internal passage receiving the first supply from the motor inlet, and said hydraulic motor includes a plurality of motive driving features located within the internal passage.
3 more elements
A device for pumping blood, comprising:
- means for centrifugally pumping blood;
- and
- means for hydraulically powering said pumping means, and said powering means uses blood to generate the power;
- wherein said pumping means has an inlet and an outlet and a body with an external centrifugal pumping surface, and said hydraulically powering means includes at least one motive conversion feature on the external surface proximate to the inlet;
- and
- which further comprises a shroud proximate to the inlet that directs a portion of the blood to flow within the shroud and over said hydraulic powering means, and directs the remainder of the blood to flow over said centrifugal pumping means.
3 more elements
A device for pumping blood, comprising:
- a hydraulic motor adapted and configured for generating power from a portion of a first supply of blood, said motor having an inlet for receiving the portion of the first blood supply at a first higher pressure and an outlet for expelling the first blood supply at a first lower pressure;
- and
- a centrifugal pump adapted and configured for increasing the kinetic energy of the remainder of the first supply of blood, said pump being powered by said hydraulic motor, wherein the remainder of the first supply of blood at a second reduced pressure less than the first higher pressure is received at an inlet of said pump, and the remainder supply of blood is expelled from an outlet of said pump at a second increased pressure that is greater than the second reduced pressure;
- wherein the portion of the first supply of blood expelled from the motor outlet and the remainder of the first supply of blood expelled from the pump outlet are combined and are recycled to the inlet of said motor and the inlet of said pump;
- wherein said centrifugal pump includes a rotating body with an outer surface adapted and configured to increase the kinetic energy of the remainder of the first supply of blood and an interior, the interior of the body receiving therein said hydraulic motor.
2 more elements
Dependencies are inferred from the claim text.