Pump housing of two different sinterable materials

• US 10,514,044 B2
• Filed: 06/20/2014
• Issued: 12/24/2019
• Est. Priority Date: 06/21/2013
• Status: Active Grant

• Current Assignee: Heraeus Deutschland GmbH & Co. KG (Heraeus Holding GMBH)
• Original Assignee: Heraeus Deutschland GmbH & Co. KG (Heraeus Holding GMBH)
• Inventors: Schibli, Stefan, Hausch, Ulrich
• Primary Examiner(s): Seabe, Justin D
• Assistant Examiner(s): Brown, Adam W
• Application Number:
  US14/900,509
• Publication Number:
  US 20160369813A1
• Time in Patent Office: 2,013 Days
• CPC Class Codes: A61M 2207/00 Methods of manufacture, assembly or production
• CPC Class Codes: A61M 60/122 Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/152 branching on and drawing blood from a blood vessel
• CPC Class Codes: A61M 60/226 the blood flow through the rotating member having mainly radial components
• CPC Class Codes: A61M 60/416 transmitted directly by the motor rotor drive shaft
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/81 Pump housings
• CPC Class Codes: A61M 60/855 of implantable pumps or pumping devices
• CPC Class Codes: B22F 1/10 Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
• CPC Class Codes: B22F 2301/25 Noble metals, i.e. Ag Au, Ir, Os, Pd, Pt, Rh, Ru
• CPC Class Codes: B22F 2302/253 Aluminum oxide (Al2O3)
• CPC Class Codes: B22F 2304/10 Micron size particles, i.e. above 1 micrometer up to 500 micrometer
• CPC Class Codes: B22F 2998/10 Processes characterised by the sequence of their steps
• CPC Class Codes: B22F 3/004 Filling molds with powder feeding material to presses in general B30B15/302
• CPC Class Codes: B22F 3/16 in successive or repeated steps
• CPC Class Codes: B22F 5/10 of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• CPC Class Codes: B22F 7/008 characterised by the composition
• CPC Class Codes: B22F 7/06 of composite workpieces or articles from parts, e.g. to form tipped tools B22F7/002 takes precedence
• CPC Class Codes: B28B 1/24 by injection moulding injection moulding of ceramic slips B28B1/265; of tubular articles B28B21/38
• CPC Class Codes: C04B 2237/343 : Alumina or aluminates
• CPC Class Codes: C04B 2237/408 : Noble metals, e.g. palladium, platina or silver
• CPC Class Codes: C04B 37/021 : in a direct manner, e.g. direct copper bonding [DCB]
• CPC Class Codes: C22C 29/00 : Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides C22C26/00 takes precedence
• CPC Class Codes: C22C 32/00 : Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
• CPC Class Codes: C22C 32/0021 : Matrix based on noble metals, Cu or alloys thereof
• CPC Class Codes: F04D 13/0606 : Canned motor pumps
• CPC Class Codes: F04D 29/026 : especially adapted for liquid pumps
• CPC Class Codes: F04D 29/181 : Axial flow rotors F04D29/185 take precedence
• CPC Class Codes: F04D 29/528 : especially adapted for liquid pumps
• CPC Class Codes: F04D 3/00 : Axial-flow pumps priming or boosting F04D9/00
• CPC Class Codes: F05B 2240/142 : in the form of a standard ISO container
• CPC Class Codes: F05B 2240/30 : Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
• CPC Class Codes: F05B 2280/10304 : Titanium
• CPC Class Codes: F05B 2280/2004 : Ceramics; Oxides
• CPC Class Codes: F05D 2300/10 : Metals, alloys or intermetallic compounds
• CPC Class Codes: F05D 2300/17 : Alloys
• CPC Class Codes: F05D 2300/20 : Oxide or non-oxide ceramics

Abstract

One aspect of the invention relates to a pump device, comprising i. an impeller; ii. a pump housing which at least partly surrounds an interior region, having an inlet and an outlet, wherein the impeller is located within the interior region of the pump housing; wherein the pump housing comprises at least one first subregion and at least one further subregion; wherein the first subregion comprises a ceramic, wherein the further subregion comprises a metal, wherein at least one part of the first subregion and at least one part of the further subregion are connected to one another. One aspect of the invention further relates to a housing which comprises the features described for the pump housing.

One aspect of the invention also relates to a method for producing a pump housing.

Claims

1. A pump device comprising:

a pump housing at least partly surrounding an interior region and having an inlet and an outlet; and

an impeller located within the interior region of the pump housing;

wherein the pump housing comprises at least one first subregion and at least two further subregions, a material of the first subregion being different than a material of the further subregions;

wherein the first subregion comprises a ceramic to an extent of at least 61% by weight, based on the total mass of the first subregion;

wherein the further subregions comprises a metal content within a range from 40 to 90% by weight, based on the total mass of the further subregions;

wherein at least one part of the first subregion and at least one part of the further subregions are connected to one another; and

wherein the at least one first subregion and the at least two further subregions alternate on an exterior circumference of the pump housing.

2. The pump device of claim 1, wherein the pump housing comprises a pipe.

3. The pump device of claim 1, wherein the at least two further subregions are positioned at the inlet or the outlet, or at both the inlet and the outlet.

4. The pump device of claim 1, wherein the ceramic of the at least one first subregion is selected from the group consisting of aluminum oxide (Al₂O₃), zirconium dioxide (ZrO₂), a zirconium oxide containing an aluminum oxide (ATZ), an aluminum oxide containing a zirconium oxide (ZTA), a zirconium oxide containing an yttrium (Y-TZP), aluminum nitride (AlN), titanium nitride (TiN), magnesium oxide (MgO), a piezoceramic, barium oxide and sodium potassium niobate or a mixture of at least two thereof.

5. The pump device of claim 1, wherein the metal of the at least one two further subregions is selected from the group consisting of platinum (Pt), iron (Fe), stainless steel, iridium (Ir), niobium (Nb), molybdenum (Mo), tungsten (W), titanium (Ti), cobalt (Co), chromium (Cr), a cobalt-chromium alloy, tantalum (Ta) and zirconium (Zr) or a mixture of at least two thereof.

6. The pump device of claim 1, wherein the at least one first subregion comprises less than 10% by weight of metal based on the total mass of the first subregion.

7. The pump device of claim 1, wherein the at least one first subregion and the at least two further subregions are connected to one another by at least one third subregion.

8. The pump device of claim 7, wherein the at least one third subregion has a metal content between the metal content of the first subregion and the metal content of the further subregions.

9. The pump device of claim 1, wherein the pump device is at least partly surrounded by a component housing, with at least one part of the at least two further subregions of the pump device being connected to the component housing.

10. The pump device of claim 9, wherein the component housing comprises at least 30% by weight of titanium based on the total mass of the component housing.

11. The pump device of claim 1, wherein the wall of the pump housing has a magnetic permeability of less than 2μ

.

12. The pump device of claim 1, wherein the surface of the at least one first subregion that faces the interior region of the pump housing has a Vickers hardness of at least 330 HV.

13. The pump device of claim 1, wherein at least the outer surfaces of the component housing and the surface facing the interior region of the pump housing are biocompatible.

14. A method for producing a pump housing for a pump device, the method comprising:

providing a first material;

providing a further material that is different than the first material;

forming a pump housing precursor, wherein a first subregion of the pump housing is formed from the first material and wherein two further subregions of the pump housing are formed from the further material and wherein the first subregion and the two further subregions alternate on an exterior circumference of the pump housing; and

treating the pump housing precursor at a temperature of at least 300°

C.

15. A method for producing a pump housing for a pump device, comprising the steps:

providing a first material;

providing a further material that is different than the first material;

forming a pump housing precursor, wherein firstly at least two further subregions of the pump housing are formed from the further material and then a first subregion of the pump housing is formed from the first material and wherein a second further subregion of the pump housing is formed from the further material, and wherein the first subregion and the two further subregions alternate on an exterior circumference of the pump housing; and

treating the pump housing precursor at a temperature of at least 300°

C.

16. The method of claim 15, wherein the forming of a pump housing precursor comprises a shaping process, selected from the group consisting of a lithographic process, an injection molding process, a machining process, an extrusion process or a combination of at least two thereof.

17. A pump housing for a pump device obtainable by a method as claimed claim 15.

18. A housing at least partly surrounding an interior region and comprising a first end and a second end;

wherein the housing has at least one first subregion and at least two further subregions, a material of the first subregion being different than a material of the two further subregions;

wherein the first subregion comprises a ceramic to an extent of at least 61% by weight, based on the total mass of the first subregion;

wherein the two further subregions comprises a metal content within a range from 40 to 90% by weight, based on the total mass of the two further subregions;

wherein at least one part of the first subregion and at least one part of the two further subregions are connected to one another; and

wherein the at least one further subregion is positioned at the first end or the second end of the interior region and wherein the at least one first subregion and the at least two further subregions alternate on an exterior circumference of the pump housing.

19. The housing of claim 18, wherein a slidable element is located in the housing, at least in one part of the housing.