Pump, especially for the blood treatment

• US 20090016915A1
• Filed: 03/29/2006
• Published: 01/15/2009
• Est. Priority Date: 03/30/2005
• Status: Active Grant

• Current Assignee: Integra Holdings LLC
• Original Assignee: Medical Service SRL
• Inventors: Caramuta, Canio
• Granted Patent: US 8,545,197 B2
• Time in Patent Office: Days
• US Class Current: 417/477.200
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3622 with a cassette forming partially or totally the blood circuit
• CPC Class Codes: A61M 1/36225 with blood pumping means or components thereof
• CPC Class Codes: A61M 1/36226 Constructional details of cassettes, e.g. specific details on material or shape
• CPC Class Codes: A61M 1/362264 the filter being a blood filter
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/284 Linear peristaltic pumps
• CPC Class Codes: F04B 43/082 the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

The invention relates to a pump, especially usable as a peristaltic pump in an apparatus for blood treatment, wherein it is provided with at least a hammer element which interacts with at least one tube portion in which a fluid to be pumped flows and with motion means for said hammer element which push the hammer element against said tube portion so as to press it, the value of the stroke executed by said element not allowing the complete crushing of the tube itself.

Claims

1-9. -9. (canceled)

10. A pump, adapted to operate as a peristaltic pump in an apparatus for blood treatment, comprising:

at least one hammer element adapted to interact with at least one tube portion in which a fluid to be pumped flows, said pump being adapted to push said at least one hammer element against the at least one tube portion so as to press the at least one tube portion, wherein a stroke executed by said at least one hammer element does not completely crush the at least one tube portion; and

a mechanically activated element adapted to move said at least one hammer element.

11. The pump of claim 10, wherein said mechanically activated element comprises a cam element.

12. The pump of claim 10, wherein said pump further comprises two additional hammer elements positioned respectively upstream and downstream of said at least one hammer element.

13. The pump of claim 11, wherein said pump further comprises at least one cam shaft on which at least one central hammer element and two lateral hammer elements are mounted, said lateral hammer elements having substantially symmetrical profiles.

14. The pump of claim 13, wherein the profiles of said lateral hammer elements are differentiated by 180°

.

15. The pump of claim 13, wherein the profiles of said lateral hammer elements are inclined towards said at least one central hammer element.

16. The pump of claim 13, wherein two central elements, supporting said at least one central hammer element, and two lateral elements, supporting said lateral hammer elements, are connected on said cam shaft.

17. A pump, adapted to operate as a peristaltic pump in an apparatus for blood treatment having a rigid wall, comprising:

at least one hammer element adapted to interact, in correspondence with the rigid wall, with at least one tube portion in which a fluid to be pumped flows, said pump being adapted to push said at least one hammer element against the at least one tube portion so as to press the at least one tube portion, wherein a stroke executed by said at least one hammer element does not completely crush the at least one tube portion; and

a mechanically activated element adapted to move said at least one hammer element.

18. The pump of claim 17, wherein said mechanically activated element comprises a cam element.

19. The pump of claim 17, wherein said pump further comprises two additional hammer elements positioned respectively upstream and downstream of said at least one hammer element.

20. The pump of claim 18, wherein said pump further comprises at least one cam shaft on which at least one central hammer element and two lateral hammer elements are mounted, said lateral hammer elements having substantially symmetrical profiles.

21. The pump of claim 20, wherein the profiles of said lateral hammer elements are differentiated by 180°

.

22. The pump of claim 20, wherein the profiles of said lateral hammer elements are inclined towards said at least one central hammer element.

23. The pump of claim 20, wherein two central elements, supporting said at least one central hammer element, and two lateral elements, supporting said lateral hammer elements, are connected on said cam shaft.