Blood pump with separate mixed-flow and axial-flow impeller stages and multi-stage stators
AssigneeHeartWare, Inc.
InventorsJingchun Wu, Michael Ricci, David Paden, Shaun Snyder
Life of this patent
Estimating the term…
Abstract
A pump for a fluid which can be blood has a stator housing and a rotor hub with leading and trailing portions and an intermediate portion disposed therebetween. At least one impeller blade at the leading portion drives circumferential and axial components of a flow into a pump annulus or intermediate pathway portion. At least one stator blade extends radially inward from the stator housing within the intermediate pathway portion and is configured to reduce a circumferential component of the flow.
Claims20
An implantable blood pump comprising:
- a stator housing including an inlet and an outlet and defining a fluid pathway therebetween;
- a rotor hub disposed within the stator housing, the rotor hub defining a diameter and a rotational axis extending from the inlet to the outlet of the stator housing;
- and
- a stator blade extending inward from the stator housing and defining a length less than the diameter of the rotor hub.
An implantable blood pump comprising:
- a stator housing including an inlet and an outlet and defining a fluid pathway therebetween;
- an inlet stator blade extending inward from the stator housing within the inlet;
- and
- a rotor hub disposed within the stator housing, the rotor hub defining a diameter and a rotational axis extending from the inlet to the outlet of the stator housing.
An implantable blood pump comprising:
- a stator housing including an inlet and an outlet and defining a fluid pathway therebetween;
- a rotor hub disposed within the stator housing, the rotor hub defining a diameter and a rotational axis extending from the inlet to the outlet of the stator housing and including a body having a leading portion including a conical geometry proximate the inlet of the stator housing, a trailing portion proximate the outlet of the stator housing, and an intermediate portion extending between the leading portion and the trailing portion, the intermediate portion of the rotor hub defining an intermediate portion of the fluid pathway;
- an inlet stator blade extending inward from the stator housing within the inlet and defining the fluid pathway from the inlet to the leading portion of the body of the rotor hub;
- and
- a stator blade extending inward from the stator housing, the stator blade defining a length less than the diameter of the rotor hub and projecting within the intermediate portion of the fluid pathway.
Dependencies are inferred from the claim text.