Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Reexamination Certificate
2007-03-01
2011-10-25
Guharay, Karabi (Department: 2889)
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
C417S477100, C417S477200, C417S477300, C417S477400
Reexamination Certificate
active
08043076
ABSTRACT:
The invention relates to a method and to a device for operating an electric peristaltic hose pump, in particular a hose pump for transporting fluids in medical-technical devices, in particular extracorporeal blood treatment devices. In order to monitor the regular operation of a hose pump, the power consumption of the pump or a physical variable in correlation with the power consumption, in particular the pump flow, is monitored. The pump flow includes a periodically non-altering direct component which is superimposed on a periodically altering alternating component. In order to monitor the regular operation of the hose pump, the alternating component of the power consumption in relation to the direct component of the power consumption is monitored as whether it increases and/or decreases during blood treatment.
REFERENCES:
patent: 5629871 (1997-05-01), Love et al.
patent: 1 156 214 (2001-11-01), None
patent: WO 93/12827 (1993-07-01), None
patent: WO 94/20157 (1994-09-01), None
patent: WO 03/072942 (2003-09-01), None
International Preliminary Report on Patentability for PCT/EP2007/001754, mailed on Oct. 14, 2008.
Breval Elmito
Fresenius Medical Care Deutschland GmbH
Guharay Karabi
Kenyon & Kenyon LLP
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