Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1976-08-16
1978-04-18
Spear, Jr., Frank A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
210 96M, 210321B, B01D 3100
Patent
active
040850463
ABSTRACT:
A renal dialysis concentrate delivery system comprising at least two renal dialysis concentrate reservoirs, first supply valve means and supply conduit means. First supply conduit means connecting a first concentrate reservoir to the first supply valve means. Second supply conduit means connecting a second concentrate reservoir to the first supply valve means. Concentrate pump means operatively associated with the supply conduit means. Conduit means for transporting the concentrate toward a renal dialysis machine. Return conduit means for returning concentrate to the concentrate reservoirs. The first supply valve means may be a three-way valve.
The return conduit means preferably includes a second three-way valve. Valve control means coordinate the positioning of the three-way valves so as to provide a first position wherein both valves are in communication with a first concentrate reservoir, and a second position wherein both valves are in communication with a second concentrate reservoir.
Means for determining when a concentrate reservoir is empty or approaching being empty may be provided. Such means may take the form of a pressure monitor in the supply conduit means and responsive signal generating means. Alternatively, such means may take the form of an air detector and responsive signal means.
REFERENCES:
patent: 3605783 (1971-09-01), Pecker et al.
patent: 3722680 (1973-03-01), Smith
patent: 3744636 (1973-07-01), Commarmot
Dialung, from Trans. Amer. Soc. Artif. Int. Organs, 1964, p. 125.
Silverman Arnold B.
Spear, Jr. Frank A.
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