Pump

• US 20120275943A1
• Filed: 09/03/2010
• Published: 11/01/2012
• Est. Priority Date: 09/03/2009
• Status: Active Grant

• Current Assignee: Quanta Dialysis Technologies Ltd.
• Original Assignee: Quanta Dialysis Technologies Ltd.
• Inventors: Coates, James, Buckberry, Clive, Wallace, Mark
• Granted Patent: US 9,482,218 B2
• Time in Patent Office: Days
• US Class Current: 417/437
• CPC Class Codes: A61M 1/14 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 Class Codes: A61M 1/36222 Details related to the interface between cassette and machine
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/362261 at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/37 Haemodialysis, haemofiltration or diafiltration
• CPC Class Codes: A61M 60/43 using vacuum at the blood pump, e.g. to accelerate filling
• CPC Class Codes: A61M 60/847 arranged in a cassette
• CPC Class Codes: A61M 60/849 Disposable parts
• CPC Class Codes: F04B 43/06 Pumps having fluid drive

Abstract

A pump for a dialysis machine, the pump having a pump chamber and a deformable membrane actuable to pump a fluid from the pump chamber, the pump chamber being substantially conical such that the membrane is actuated to extend into the conical chamber in order to pump the fluid from the chamber.

Claims

1. A pump for a dialysis machine, the pump comprising:

a pump chamber and a deformable membrane actuable to pump fluid from the pump chamber, the pump chamber being substantially conical such that the membrane is actuated to extend into the conical chamber in order to pump the fluid from the chamber.

2. The pump of claim 1, wherein:

the pump is used to pump extracorporeal blood.

3. The pump of claim 1, wherein:

the pump is used to pump water or dialysate.

4. The pump of claim 1, wherein:

the pump chamber is frustoconical.

5. The pump of claim 1, further comprising:

an upper surface for supporting the deformable membrane, the pump chamber having an inner surface which extends downwardly from the upper surface, wherein a transition surface is arranged between the upper surface and the inner surface, the transition surface having a curved profile so as to provide a smooth transition of the membrane within the pump chamber upon actuation of the pump.

15. The dialysis machine of claim 1, wherein:

the pump further comprises an upper surface for supporting the deformable membrane, the pump chamber having an inner surface which extends downwardly from the upper surface, wherein a transition surface is arranged between the upper surface and the inner surface, the transition surface having a curved profile so as to provide a smooth transition of the membrane within the pump chamber upon actuation of the pump.

6. A pump for a dialysis machine, the pump comprising:

a pump chamber and an upper surface for supporting a deformable membrane actuable to pump a fluid, the pump chamber having an inner surface which extends downwardly from the upper surface, wherein a transition surface is arranged between the upper surface and the inner surface, the transition surface having a curved profile so as to provide a smooth transition of the membrane within the pump chamber upon actuation of the pump.

7. The pump of claim 6, wherein:

the pump chamber is substantially conical.

8. The pump of claim 6, wherein:

the pump is used to pump extracorporeal blood.

9. The pump of claim 6, wherein:

the pump is used to pump water or dialysate.

10. The pump of claim 7, wherein:

the pump chamber is frustoconical.

11. A dialysis machine comprising:

a pump having a pump chamber and a deformable membrane actuable to pump fluid from the pump chamber, the pump chamber being substantially conical such that the membrane is actuated to extend into the conical chamber in order to pump the fluid from the chamber.

12. The dialysis machine of claim 11, wherein:

the pump is used to pump extracorporeal blood.

13. The dialysis machine of claim 11, wherein:

the pump is used to pump water or dialysate.

14. The dialysis machine of claim 11, wherein:

the pump chamber is frustoconical.