EP0467234A2
Expired / Lapsed
EP
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Centrifugal pump for liquids, in particular for blood in extracorporeal circulation
Assignee: Dideco SpA
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Filing: 1991-07-12
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Granted: —
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Expires: 2011-07-12
Abstract
Abstract In a centrifugal pump for liquids, in particular for blood in extracorporeal circulation, characterized in that it comprises a containment body (1) for an impeller (2) having the shape of a disk and comprising magnets inside it and having, on both faces, blades (2b) adapted for making contact with the liquid; the containment body (1) has at least one liquid inflow connection (3), which is connected to ducts for conveying the liquid proximate to the center of the impeller (2) on both sides thereof, and at least one liquid outflow connection (4); the containment body (1) is shaped so that it can be removably inserted in a seat defined in a fixed base within which there is at least one magnet arranged so as to face the seat and being connected to means adapted for rotating it so as to rotationally entrain the impeller (2).
Inventors
- 👤 Pietro Vescovini
- 👤 Nicola Ghelli
- 👤 Ivo Panzani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 02:00
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/049; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/40; A61M60/403; A61M60/419; A61M60/80; A61M60/802; A61M60/804; A61M60/806; A61M60/818; A61M60/825; A61M60/827; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/027; F04D29/0467; F04D29/40; F04D29/42; F04D29/426; F04D29/4273; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
256 words
A centrifugal pump for liquids such as blood for the extracorporeal circulation thereof comprising: a body (1) for the centrifugal pump to contain parts thereof for the operation therein and the passage therethrough of liquids in an inside thereof; an impeller (2) carried within the inside of the body (1) and movable therein about a center of the impeller (2), the impeller (2) having a disk shape and carrying magnets (2a) therein; a pair of opposed sides on the impeller as the major surfaces of the disk; a plurality of blades (2b) on the impeller and extending from the surfaces in opposite directions, the blades (2b) set to make contact with the liquid for directing the passage of the liquid radially along the impeller (2) from its center and through the inside of the body (1); inflow connection means (3) on the body (1) to receive liquid and permit flow into the inside of the body (1); outflow connection means (4) on the body (1) to receive liquid from the impeller (2) and permit flow out of the inside of the body (1), and baffel means (6,7) within the inside of the body (1) located for directing the flow of liquid to pass through the inflow connection means (3), the baffel means (6,7) shaped to direct the flow toward the centers of the opposed sides of the impeller, the baffel means internally configured to thereafter maintain the centrifugal flow of liquid radial from each center, along the blades (26) and into the outflow connection means (4).
Claim 2
Dependent Claim
256 words
A centrifugal pump for liquids such as blood for the extracorporeal circulation thereof comprising: a body (1) for the centrifugal pump to contain parts thereof for the operation therein and the passage therethrough of liquids in an inside thereof; an impeller (2) carried within the inside of the body (1) and movable therein about a center of the impeller (2), the impeller (2) having a disk shape and carrying magnets (2a) therein; a pair of opposed sides on the impeller as the major surfaces of the disk; a plurality of blades (2b) on the impeller and extending from the surfaces in opposite directions, the blades (2b) set to make contact with the liquid for directing the passage of the liquid radially along the impeller (2) from its center and through the inside of the body (1); inflow connection means (3) on the body (1) to receive liquid and permit flow into the inside of the body (1); outflow connection means (4) on the body (1) to receive liquid from the impeller (2) and permit flow out of the inside of the body (1), and baffel means (6,7) within the inside of the body (1) located for directing the flow of liquid to pass through the inflow connection means (3), the baffel means (6,7) shaped to direct the flow toward the centers of the opposed sides of the impeller, the baffel means internally configured to thereafter maintain the centrifugal flow of liquid radial from each center, along the blades (26) and into the outflow connection means (4).
Claim 3
Dependent Claim
53 words
Centrifugal pump according to claim 1, characterized in that a nonmovable base (14) has seating means shaped to removably receive and hold the body (1) in position therewithin, and rotating magnet means (15,15a; 16,16a) in the seating means, the rotating magnet means (15,15a;16,16a) facing the body (1) to rotationally drive the impeller (2).
Claim 4
Dependent Claim
67 words
Centrifugal pump according to claim 1, characterized in that the impeller (2) has a pivot shaft (23) affixed thereto through the center thereof and along an axis of rotation, the pivot shaft (2c) having opposite ends supported by bushings (5a,5b) carried by and inserted within the inside body (1), the bushings (5a,5b) being aligned along the axis for receiving the opposite ends of the pivot shaft (2c).
Claim 5
Dependent Claim
71 words
Centrifugal pump according to claim 1, characterized in that the impeller (2) is supported upon a bearing (23) located in the center thereof, the impeller (2) rotatable about a pivot shaft (24a,24b) having opposite ends fixed and rigidly associated within the inside of the body (1), the impeller (2) being carried to rotate about an axis of rotation estabilished by the pivot shaft (24a,24b) within the inside of the body (1).
Claim 6
Dependent Claim
47 words
Centrifugal pump according to claim 4, characterized in that the impeller bearing (23) includes rollers protected from contact with liquid flow through the inside of the body (1) by a pair of sealing gasket (25,26) positioned at the center of the impeller (2) on each side thereof.
Claim 7
Dependent Claim
48 words
Centrifugal pump according to claim 1, characterized in that the impeller body (1) has opposed covers (8,9), each of substantially cylindrical and generally planar shape and a lateral surface thereabout and in that the inflow and outflow connections means (3,4) are arranged substantially tangent to the lateral surface.
Claim 8
Dependent Claim
79 words
Centrifugal pump according to claim 6, characterized in that lenticular spaces are formed between the baffel means (6,7) and the covers (8,9), the lenticular spaces are in fluid communication with the centers on the opposite sides of the impeller (2), the lenticular spaces connect to the liquid connection inflow means to allow flow of liquid to the centers of the impeller (2), the centers of the impeller (2) are in fluid communication with the liquid outflow connection means (3,4).
Claim 9
Dependent Claim
177 words
Centrifugal pump according to claim 1, characterized in that the body (1) has two covers (8,9) including cambered elements (6,7) extending radially inwardly and open at the center, each cover (8,9) having rigid edges about its perimeter and the perimeter of its cambered element, the edges are shaped to mate with each other, the cambered elements (6,7) being shaped for minimizing the space available inside the body (1) to accommodate the impeller (2); a first opening (12) located at a portion of the mating edges of the cambered elements (6,7), the first opening (12) shaped not to interrupt the continuity of the mating edges of the cambered elements (6,7), the first opening (12) connecting the lenticular spaces to the inflow connection means (3); a second opening (13) at another portion of the mating edges of the cambered elements (6,7), the second opening (13) shaped so as not to interrupt the continuity of the mating edges, the second opening (13) connecting space available inside the body (1) to accommodate the impeller (2) to the outflow connection means (4).
Claim 10
Dependent Claim
43 words
Centrifugal pump according to claim 1, characterized in that the nonmovable base (14) includes two magnets (15,15a;16,16a) which rotate synchronously and are positioned in opposed facing relation; a seat adapted for accommodating the impeller body (1) so that it is removably received therewithin.
Claim 11
Dependent Claim
31 words
Centrifugal pump according to claim 9, characterized in that the magnets (15,16) held within magnet-holder disks (15a,16a) are connected for ensuring synchronous motion to a drive (18,19,20,21) and a motor (17).
Claim 12
Dependent Claim
36 words
Centrifugal pump according to claim 10, characterized in that the drive (18,19,20,21) for the magnet-holder disks (15a,16a) are kinematically connected with an identical transmission ratio by a transmission shaft (22) by means of toothed belts (18,19).
References Cited (Backward Citations)
No citation records indexed.
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