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US 11,311,659 B2Granted
Blood treatment device comprising a metering line having a membrane pump and a valve and method for metering
AssigneeFresenius Medical Care Deutschland GmbH
InventorArne Peters
Life of this patent
Estimating the term…
Abstract
The invention relates to a blood treatment device having at least one metering line which opens into a fluid circuit, wherein a conveyor module is arranged in the metering line and comprises a membrane pump and a valve which is arranged at the pressure side thereof and which can act both as a blocking valve and as a restricting valve.
Claims15
A blood treatment device having
- at least one metering line having an opening into a fluid circuit,
- a conveyor module arranged in the metering line and comprising a membrane pump having a pressure side and a valve which is arranged on the pressure side and which can act both as a blocking valve and as a restricting valve by changing the valve flow cross-section, and
- a control unit which controls the pump and the valve such that the flow cross-section in the valve is reduced with respect to the maximum flow cross-section during a pressure phase of the pump in order to increase the flow resistance and thus to generate a counter-pressure in a fluid chamber of the pump.
Dependencies are inferred from the claim text.