Device and method for transporting medicinal liquids
First Claim
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1. A dialysis machine, comprising:
- a device that delivers a concentrate used for preparing a dialysis fluid in the dialysis machine, includingat least one pump configured as a displacement pump with a suction side and a pressure side; and
at least one control unit that controls operation of the pump,the pump being actuated by the control unit such that during a single suction stroke in a first operating condition,on the suction side the pump sucks in a volume of the concentrate exceeding a desired delivery volume thereof so as to discharge the desired delivery volume, andon the pressure side discharges portions of the volume sucked in by performing a plurality of partial delivery strokes as partial volumes which are smaller than the volume sucked in, the partial volumes each corresponding to the desired delivery volume.
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Abstract
A device and a method for delivering fluids, preferably for delivering medical fluids, such as in the field of dialysis, include at least one pump designed as a displacement pump and at least one control unit that controls the operation of the pump. The pump is actuated by the control unit such that during a suction stroke in a first operating condition the pump takes in a volume exceeding a desired delivery volume for the purpose of discharging a desired delivery volume, and discharges portions of the volume taken in by performing a plurality of partial delivery strokes in the form of partial volumes which are smaller than the volume taken in.
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Citations
21 Claims
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1. A dialysis machine, comprising:
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a device that delivers a concentrate used for preparing a dialysis fluid in the dialysis machine, including at least one pump configured as a displacement pump with a suction side and a pressure side; and at least one control unit that controls operation of the pump, the pump being actuated by the control unit such that during a single suction stroke in a first operating condition, on the suction side the pump sucks in a volume of the concentrate exceeding a desired delivery volume thereof so as to discharge the desired delivery volume, and on the pressure side discharges portions of the volume sucked in by performing a plurality of partial delivery strokes as partial volumes which are smaller than the volume sucked in, the partial volumes each corresponding to the desired delivery volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of delivering a concentrate used for preparing a dialysis fluid in a dialysis machine, the method comprising the steps of:
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delivering the concentrate with a device that includes at least one pump configured as a displacement pump with a suction side and a pressure side, and at least one control unit that controls operation of the pump, the step of delivering the concentrate including actuating the pump with the control unit such that during a single suction stroke in a first operating condition, on the suction side the pump sucks in a volume of the concentrate exceeding a desired delivery volume thereof so as to discharge the desired delivery volume, and on the pressure side discharges portions of the volume sucked in by performing a plurality of partial delivery strokes as partial volumes which are smaller than the volume sucked in, the partial volumes each corresponding to the desired delivery volume. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification