Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1976-04-07
1978-08-15
Spear, Jr., Frank A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
13750547, 137 99, 210136, 210137, 210321B, B01D 3100
Patent
active
041070399
ABSTRACT:
A system continuously prepares dialysate by mixing water under pressure with concentrate to form dialysate under pressure. This dialysate is supplied on demand to a single patient station or to a plurality of patient stations. The pressure at which this dialysate is supplied to multiple patient stations is controlled so changes in the flow to one station will not change the pressure at which dialysate is supplied to other stations. A pressure regulator senses the pressure of the dialysate supplied to the patient stations and controls a regulator valve connected between the source of water under pressure and a proportioning pump which mixes this water with concentrate. The regulator includes a constant force spring assembly which provides a constant bias against the pressure in a sensing chamber over a range of linear movement of the pressure sensing element.
REFERENCES:
patent: 1202403 (1966-10-01), Miller
patent: 2804089 (1957-08-01), Seifferle
patent: 3032056 (1962-05-01), Riley et al.
patent: 3441136 (1969-04-01), Serfass et al.
patent: 3598727 (1971-08-01), Willock
patent: 3605783 (1966-03-01), Pecker et al.
Specification Sheet of Seattle Artificial Kidney Supply Co., copyright 1972.
"Human Factors in the Design of Artificial Kidney Machines," Published by The American Society of Mechanical Engineers, Nov. 1973.
"A Central System for the Continuous Preparation and Distribution of Hemodialysis Fluid," Grimsrud et al., vol. X, Trans. Amer. Soc. Art. & Int. Organs, 1964, p. 107.
Lindsay, Jr. Edward R.
Meginniss, III Stephen Mason
Extracorporeal Medical Systems, Inc.
Spear, Jr. Frank A.
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