US3744636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialysis liquid monitoring and generating assembly
Assignee: Rhone Poulenc SA
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Filing: 1972-01-05
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Granted: 1973-07-10
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Expires: 1992-01-05
Abstract
Abstract Apparatus for generating and controlling the supply of dialysis liquid to a haemodialyzer comprises sources of dialysis liquid concentrate and water and a metering vessel for each, a mixing tank and a storage tank interconnected by flexible pipelines with valves and pinching devices. A heating vessel is between the storage tank and the haemodialyzer and a gas-bubble line runs from the top of the heating vessel direct to the pump by-passing the dialyzer. A part of the system including a temporary storage buffer tank may be formed into a smaller circuit for sterilization purposes.
Inventors
- 👤 R Commarmot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1654; A61M1/1656; A61M1/166; A61M1/1662; A61M1/1668; A61M1/168; A61M1/1686
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
209 words
A dialysis liquid monitoring and generating assembly for supplying dialysis liquid to at least one haemodialyser, said assembly comprising a first flexible pipeline for connection to a source of water, a second flexible pipeline for connection to a source of dialysis liquid concentrate, a vessel fed by said first pipeline for metering said water, a vessel fed by said second pipeline for metering said dialysis liquid concentrate, means for detecting the levels of the liquids in each of said metering vessels, a mixing tank, a storage tank, third and fourth flexible pipelines respectively connecting said metering vessels to said mixing tank, and a fifth flexible pipeline connecting said mixing tank to said storage tank, said metering vessels, said mixing tank and said storage tank being arranged for gravitational flow of liquid from the metering vessel to the mixing tank and from the mixing tank to the storage tank, a valve for controlling liquid flow through each of said first and second flexible pipelines, pinching means for pinching each of said first and second flexible pipelines, pinching means for pinching each of said third and fourth flexible pipelines, means for pinching said fifth pipeline and a single motor connected with all said pinching means for simultaneously actuating said pinching means.
Claim 2
Dependent Claim
209 words
A dialysis liquid monitoring and generating assembly for supplying dialysis liquid to at least one haemodialyser, said assembly comprising a first flexible pipeline for connection to a source of water, a second flexible pipeline for connection to a source of dialysis liquid concentrate, a vessel fed by said first pipeline for metering said water, a vessel fed by said second pipeline for metering said dialysis liquid concentrate, means for detecting the levels of the liquids in each of said metering vessels, a mixing tank, a storage tank, third and fourth flexible pipelines respectively connecting said metering vessels to said mixing tank, and a fifth flexible pipeline connecting said mixing tank to said storage tank, said metering vessels, said mixing tank and said storage tank being arranged for gravitational flow of liquid from the metering vessel to the mixing tank and from the mixing tank to the storage tank, a valve for controlling liquid flow through each of said first and second flexible pipelines, pinching means for pinching each of said first and second flexible pipelines, pinching means for pinching each of said third and fourth flexible pipelines, means for pinching said fifth pipeline and a single motor connected with all said pinching means for simultaneously actuating said pinching means.
Claim 3
Dependent Claim
65 words
An assembly according to claim 1, further comprising a downstream end to each of said third and fourth flexible pipelines, each of said downstream ends being within the mixing tank, wherein the downstream end of said fourth flexible pipeline between the dialysis liquid concentrate metering vessel and the mixing tank is within said third flexible pipeline between the water metering vessel and the mixing tank.
Claim 4
Dependent Claim
87 words
An assembly according to claim 1, further comprising a heating vessel for the dialysis liquid, said heating vessel being arranged in the assembly downstream of said storage tank; a haemodialyser downstream of said heating vessel; a suction pump downstream of said dialyzer, said suction pump having an inlet port; and a pipeline running from the top of said heating vessel to said inlet port of the suction pump, whereby gases formed in the heating vessel are removed from the dialysis liquid before the latter reaches the haemodialyser.
Claim 5
Dependent Claim
44 words
An assembly according to claim 3 further comprising means for selectively bypassing the haemodialyser to form at least part of the remainder of the circuit including the heating vessel into a closed circuit, whereby sterilisation of that part of the circuit may be performed.
Claim 6
Dependent Claim
15 words
An assembly according to claim 4 wherein said closed circuit includes a temporary storage tank.
Claim 7
Dependent Claim
35 words
An assembly according to claim 4, wherein said heating vessel is operable to raise the temperature of the liquid in said closed circuit for sterilisation to a temperature in the region of 90* to 100*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |