Blood pump
First Claim
Patent Images
1. A blood pump, comprising:
- a first casing, its rim forming an opening;
a second casing having an inlet opening at the top and an outlet opening at an arbitrary position;
a pump base part attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
a drive part housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
a plurality of impellers extending in radial direction from the outer periphery of the boss; and
a pump part constituted by the concurrence of the plurality of impellers and the second casing, wherein one part is cut out in each of the plurality of impellers'"'"' surfaces to form a window opening part, which is located downstream from the impellers'"'"' boss attachment part.
1 Assignment
0 Petitions
Accused Products
Abstract
The blood pump of the present invention comprises:
- a first casing (1), its rim forming an opening;
- a second casing (2) having an inlet opening at the top and an outlet opening at an arbitrary position;
- a pump base part (5) attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
- a drive part (7) housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
- a plurality of impellers (11) extending in radial direction from the outer periphery of the boss; and
- a pump part (3) constituted by the concurrence of the plurality of impellers and the second casing,
- wherein the impellers'"'"' boss attachment parts are shifted forward towards the inlet opening.
- wherein one part is cut out in each of the plurality of impellers'"'"' surfaces to form a window opening part (13).
As a result, the blood pump of the present invention ensures smooth blood flow and therefore allows to effectively prevent the development of thrombi.
-
Citations
20 Claims
-
1. A blood pump, comprising:
-
a first casing, its rim forming an opening;
a second casing having an inlet opening at the top and an outlet opening at an arbitrary position;
a pump base part attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
a drive part housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
a plurality of impellers extending in radial direction from the outer periphery of the boss; and
a pump part constituted by the concurrence of the plurality of impellers and the second casing, wherein one part is cut out in each of the plurality of impellers'"'"' surfaces to form a window opening part, which is located downstream from the impellers'"'"' boss attachment part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A blood pump, comprising:
-
a first casing, its rim forming an opening;
a second casing having an inlet opening at the top and an outlet opening at an arbitrary position;
a pump base part attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
a drive part housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
a plurality of impellers extending in radial direction from the outer periphery of the boss; and
a pump part constituted by the concurrence of the plurality of impellers and the second casing, wherein each impeller of the plurality of impellers features an inducer on the inlet opening side of the impeller, the inducer being layed-out to be inclined at a prescribed angle against each impeller. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A blood pump comprising:
-
a first casing, its rim forming an opening;
a second casing having an inlet opening at the top and an outlet opening at an arbitrary position;
a pump base part attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
a drive part housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
a plurality of impellers extending in a radial direction from the outer periphery of the boss; and
a pump part constituted by the concurrence of the plurality of impellers and the second casing, wherein the impellers'"'"' boss attachment parts are shifted up to the axial flow zone forward towards the inlet opening, and wherein each impeller of the plurality of impellers features an inducer on the inlet opening side of the impeller, the inducer being layed-out to be inclined at a prescribed angle against each impeller.
-
-
20. A blood pump comprising:
-
a first casing, its rim forming an opening;
a second casing having an inlet opening at the top and an outlet opening at an arbitrary position;
a pump base part attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing;
a drive part housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part;
a plurality of impellers extending in a radial direction from the outer periphery of the boss; and
a pump part constituted by the concurrence of the plurality of impellers and the second casing, wherein the impellers'"'"' boss attachment parts are shifted up to the axial flow zone forward towards the inlet opening, and wherein one part is cut out in each of the plurality of impellers'"'"' surfaces to form a window opening part;
the inner wall of the second casing is tapered, continuously increasing in width from the inlet opening towards the base rim, and is formed to draw as close as possible to the outer outline of the impellers, the boss and impellers being surrounded by the inner wall and protruding towards the inlet opening;
each impeller of the plurality of impellers features an inducer on the inlet opening side of the impeller, the inducer being layed-out to be inclined at a prescribed angle against each impeller; and
the pump base part features a convex part protruding towards the second casing, the convex part'"'"'s flank being formed to slope gently so as to draw as close as possible to the inner outline of the impellers.
-
Specification