Fluid pump
AssigneeBerlin Heart GmbH
InventorsAdrian Wisniewski, Jörg Müller, Bodo Schmidt
Life of this patent
Estimating the term…
Abstract
A fluid pump is provided for delivering a fluid, particularly blood, comprising: a housing with a fluid inlet and a fluid outlet and a rotor, which is mounted in the housing such that it can rotate about an axis of rotation in order to deliver the fluid from the fluid inlet to the fluid outlet, the rotor being mounted in the housing by means of a mechanical bearing. A flow cross-section between the rotor and the housing has a local or partial flow cross-section minimum in the direction of the axis of rotation in the region of the mechanical bearing.
Claims18
A fluid pump for conveying a fluid comprising:
- a housing including a fluid inlet and a fluid outlet
- and a rotor, which is arranged rotatably about an axis of rotation within the housing for conveying fluid between the fluid inlet and the fluid outlet, the rotor having an inlet-side end extending towards the fluid inlet, an outlet-side end extending towards the fluid outlet, and an outer surface radial to the axis of rotation and cooperating with an inner surface of the housing to define a flow channel for conveying fluid between the rotor and the housing,
- the rotor being mounted in the housing by way of a mechanical bearing, wherein the mechanical bearing is arranged at the inlet-side end of the rotor, and where the mechanical bearing comprises at least a first bearing component associated with the housing in contact with at least a second bearing component associated with the rotor, and
- wherein within the flow channel a profile of a flow cross-section between the outer surface of the rotor and the inner surface of the housing, in the direction of the axis of rotation, has a local or regional flow cross-section minimum in the region of the mechanical bearing;
- wherein a maximum increase in the flow cross-section, in the direction of the axis of rotation, upstream of the local or regional flow cross-section minimum is greater than, or equal to, that downstream of the local or regional flow cross-section minimum.
A fluid pump for conveying a fluid comprising:
- a housing including a fluid inlet and a fluid outlet
- and a rotor, which is arranged rotatably about an axis of rotation within the housing for conveying fluid from the fluid inlet to the fluid outlet, the rotor having an inlet-side end extending towards the fluid inlet and an outlet-side end extending towards the fluid outlet,
- the rotor being mounted in the housing by way of a mechanical bearing, wherein the mechanical bearing is arranged at the inlet-side end of the rotor, and where the mechanical bearing comprises at least a first bearing component associated with the housing in contact with at least a second bearing component associated with the rotor,
- wherein a profile of a flow cross-section between the rotor and the housing, in the direction of the axis of rotation, has a local or regional flow cross-section minimum in the region of the mechanical bearing, and
- wherein a maximum increase in the flow cross-section, in the direction of the axis of rotation, upstream of the local or regional flow cross-section minimum is greater than, or equal to, that downstream of the local or regional flow cross-section minimum.
Dependencies are inferred from the claim text.