Blood pump integrated in a housing front

Patent metadata

Field	Value
Publication number	US-2016243296-A1
Application number	US-201615046873-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Feb 25, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

A device for extracorporeal blood treatment, in particular a dialysis machine, including a peristaltic pump for conveying fluid from a low-pressure side to a high-pressure side, the peristaltic pump comprising a rotor which is rotatable around a rotor axis and a support area which is formed around the rotor axis in an arcuate manner, with an elastically deformable fluid line being able to be positioned between the rotor and the support area and being deformed between the rotor and the support area with rotation of the rotor while forming a cross-sectional constriction, so that upon rotation of the rotor with respect to the support area a fluid in the fluid line is conveyed from the low-pressure side to the high-pressure side. The device includes a machine housing part realized as a formed sheet metal part, wherein the support area is formed in the machine housing part by plastic deformation.

First claim

1 - 11 . (canceled)

12 . A device for extracorporeal blood treatment comprising:
a rotor rotatable around a rotor axis; and a formed sheet metal housing part including a support area formed in the formed sheet meal housing part by plastic deformation, the support area formed around the rotor axis in an arcuate manner; wherein the rotor and the support area of the formed sheet metal housing part provide a peristaltic pump for conveying fluid in an elastically deformable fluid line from a low-pressure side to a high-pressure side when the fluid line is positioned between the rotor and the support area and deformed by the rotor and the support area with rotation of the rotor which forms a cross-sectional constriction, so that upon rotation of the rotor with respect to the support area the fluid in the fluid line is conveyed from the low-pressure side to the high-pressure side.

13 . The device for extracorporeal blood treatment according to claim 12 , wherein the device is a dialysis machine.

14 . The device for extracorporeal blood treatment according to claim 12 , wherein the support area is formed by cold working.

15 . The device for extracorporeal blood treatment according to claim 14 , wherein the support area is formed by deep-drawing.

16 . The device for extracorporeal blood treatment according to claim 12 , wherein the support area is located at the periphery of an indentation or elevation incorporated in the formed sheet metal housing part.

17 . The device for extracorporeal blood treatment according to claim 12 , wherein the support area is a partial cylinder.

18 . The device for extracorporeal blood treatment according to claim 12 , wherein the support area is inclined by an angle α with respect to a surface place of the formed sheet metal housing part, wherein the angle α is between 120° and 95°.

19 . The device for extracorporeal blood treatment according to claim 18 , wherein the angle α is between 115° and 100°.

20 . The device for extracorporeal blood treatment according to claim 19 , wherein the angle α is between 110° and 105°.

21 . The device for extracorporeal blood treatment according to claim 12 , wherein the support area surrounds a bottom portion or bottom area which is radially formed within the support area and is deformed with the support area.

22 . The device for extracorporeal blood treatment according to claim 21 , wherein the bottom portion or the bottom area forms an axial bearing surface for at least one of the fluid line or the rotor.

23 . The device for extracorporeal blood treatment according to claim 12 , wherein the rotor axis is parallel to the support area.

24 . The device for extracorporeal blood treatment according to claim 16 , wherein the indentation has a horseshoe-shaped outer contour, wherein inlet faces and outlet faces are formed at respective sides of the support area such that they are parallel to the rotor axis.

25 . A housing part for a device for extracorporeal blood treatment according to claim 12 , wherein the housing part is made of sheet metal,
wherein an indentation is formed in the housing part by plastic deformation, the indentation serving for receiving a rotor which is rotatable around a rotor axis and an elastically deformable fluid line section of a peristaltic pump, wherein a periphery of the indentation formed around the rotor axis in an arcuate manner forms a support area against which the fluid line section can be pressed by means of the rotor for constricting the cross-section.

26 . A method of manufacturing a housing part for a device for extracorporeal blood treatment according to claim 12 , the method comprising the steps of:
forming the housing part of sheet metal; and forming an indentation in the housing part by plastic deformation, the indentation serving for receiving a rotor which is rotatable around a rotor axis and an elastically deformable fluid line section of a peristaltic pump, wherein a periphery of the indentation formed around the rotor axis in arcuate manner forms a support area against which the fluid line section can be pressed by means of the rotor for constricting the cross-section.

Assignees

• Braun Avitum Ag

Inventors

• Schaefer Oliver
• Ritter Kai-Uwe

Classifications

• B01D61/28

  Apparatus therefor · CPC title

• A61M2207/00

  Methods of manufacture, assembly or production · CPC title

• A61M1/14 Primary

  Dialysis systems; Artificial kidneys; Blood oxygenators (semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00){; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis} · CPC title

• A61M1/1043 Primary

  Human Necessities · mapped topic

• A61M1/1039

  Human Necessities · mapped topic