Liquid purification or separation – Flow – fluid pressure or material level – responsive – Float
Patent
1985-02-21
1988-08-30
Fisher, Richard V.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Float
2102572, 21032165, 21032771, 21032172, 210929, B01D 1300
Patent
active
047675268
ABSTRACT:
Artificial kidney comprises a hemodialyzer connected in a dialysis liquid circuit which is in the form of a loop the volume of which is essentially invariable. The circuit is open to the atmosphere and comprises a circulating pump arranged upstream of the hemodialyzer. Means are provided for drawing off and measuring, outside the said circuit, amounts of liquid equal to the amounts of ultrafiltrate which it is desired to remove from a patient's blood stream. A variable hydraulic resistance is provided downstream of the hemodialyzer and comprises a float, the resistance being operative to keep the dialysis liquid at an essentially constant level in the circuit in order automatically to regulate the pressure of the dialysis liquid in the hemodialyzer.
REFERENCES:
patent: 3946731 (1976-03-01), Lichtenstein
patent: 4021341 (1977-05-01), Cosentino et al.
patent: 4024059 (1977-05-01), Sausse
patent: 4191646 (1980-03-01), Larsson et al.
patent: 4267041 (1981-05-01), Schael
patent: 4298357 (1981-11-01), Pernic
patent: 4348280 (1982-09-01), George et al.
Fisher Richard V.
Honor Robert S.
Hospal Industrie
Jewell Walter F.
Jones W. Gary
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