US4004884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division metering system
Assignee: Hoffmann La Roche Inc
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Filing: 1976-07-02
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Granted: 1977-01-25
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Expires: 1996-07-02
Abstract
Abstract An improved system for metering a plurality of fluids is described. The instant system utilizes time division switching in flow valves to provide accurate metering of a plurality of fluids from individual reservoirs.
Inventors
- 👤 Joseph John Zdrodowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/34; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/133; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/8593; Y10T137/86389; Y10T137/86397; Y10T137/86445
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A time division metering system comprising in combination: A. a plurality of fluid reservoir vessel means each said vessel means being in operative fluid flow relationship with a valve means said valve means controlling the flow of fluid from said vessel means; B. electronic controller means in electronic control relationship with said plurality of valves wherein said electronic controller means provides a signal to each said valve means in preselected order, said signal causing each said valve means to open for a predetermined interval and at a predetermined frequency thereby allowing fluid to flow from the corresponding reservoir vessel means so as to achieve rapid cycling; C. tee means in operative fluid flow relation with each said valve means wherein the fluid flowing from said valve means are combined to form a single final fluid stream containing quantities of the respective fluids from said reservoir vessel means in exact ratio to the time intervals each corresponding valve means was held open.
Claim 2
Dependent Claim
161 words
A time division metering system comprising in combination: A. a plurality of fluid reservoir vessel means each said vessel means being in operative fluid flow relationship with a valve means said valve means controlling the flow of fluid from said vessel means; B. electronic controller means in electronic control relationship with said plurality of valves wherein said electronic controller means provides a signal to each said valve means in preselected order, said signal causing each said valve means to open for a predetermined interval and at a predetermined frequency thereby allowing fluid to flow from the corresponding reservoir vessel means so as to achieve rapid cycling; C. tee means in operative fluid flow relation with each said valve means wherein the fluid flowing from said valve means are combined to form a single final fluid stream containing quantities of the respective fluids from said reservoir vessel means in exact ratio to the time intervals each corresponding valve means was held open.
Claim 3
Dependent Claim
13 words
The system of claim 1 wherein said fluid reservoir vessel means are pressurized.
Claim 4
Dependent Claim
21 words
The system of claim 2 wherein a single pressure regulator means controls the pressure of all said fluid reservoir vessel means.
Claim 5
Dependent Claim
23 words
The system of claim 1 wherein said tee means provides turbulent flow thereby blending said various fluids into a homogeneous single fluid stream.
Claim 6
Dependent Claim
34 words
The system of claim 1 wherein said tee means provides non-turbulent flow thereby maintaining each said fluid streams from said plurality of fluid reservoir vessel means as discrete portions of said final fluid stream.
Claim 7
Dependent Claim
27 words
The system of claim 5 wherein one of said fluid reservoir vessel means provides a spacer fluid to help maintain the integrity of said individual fluid streams.
Claim 8
Dependent Claim
18 words
The system of claim 6 wherein said spacer fluid is air and said individual fluid streams are liquids.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |