Patent US2984218A successfully refreshed from Google Patents.
Patent US3848618A successfully refreshed from Google Patents.
US3848618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mixing fluids of different specific gravity
Assignee: Individual
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Filing: 1972-12-29
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Granted: 1974-11-19
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Expires: 1992-12-29
Abstract
Abstract Apparatus for mixing liquids of different specific gravity comprising a source of sample liquid, the specific gravity of which is to be controlled, and a source of less dense liquid each being connected to means adapted to control mixing of the liquids to maintain a predetermined specific gravity. The control means comprises a U-shaped tube, one leg containing control liquid, having a desired specific gravity, and the other leg having sample solution circulating therethrough. As the specific gravity of the sample solution changes the surface of control liquid makes and breaks contact with an electrode connected to apparatus to eject the less dense liquid into the sample solution.
Inventors
- 👤 E Royse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/135; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2504
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
147 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; means for admitting the solution into the reservoir; actuated valve means adapted to admit first liquid into the means for admitting the solution into the reservoir; a U-shaped tube in said reservoir, said U-shaped tube having first and second legs, each of said legs being opened to atmosphere; means to admit solution to said first leg to form a column of solution therein; means associated with said first leg to adjust the heighth of the column of solution; control liquid in said second leg forming a column of control liquid therein; and an electrode secured to said second leg, said electrode being engageable by said control liquid to sense changes in the level of the column of control liquid, said electrode being adapted to actuate said actuated valve means.
Claim 2
Independent Claim
147 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; means for admitting the solution into the reservoir; actuated valve means adapted to admit first liquid into the means for admitting the solution into the reservoir; a U-shaped tube in said reservoir, said U-shaped tube having first and second legs, each of said legs being opened to atmosphere; means to admit solution to said first leg to form a column of solution therein; means associated with said first leg to adjust the heighth of the column of solution; control liquid in said second leg forming a column of control liquid therein; and an electrode secured to said second leg, said electrode being engageable by said control liquid to sense changes in the level of the column of control liquid, said electrode being adapted to actuate said actuated valve means.
Claim 3
Independent Claim
146 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; outer and inner tubular members arranged to form an annular flow passage having an open upper end; means to admit solution into the annular flow passage such that a portion of the solution flows into the inner tubular member; actuated means adapted to admit first liquid into the reservoir; a U-shaped tube having first and second legs, each of said legs being opened to atmosphere; a tube secured between said inner tubular member and said first leg to admit solution to said first leg to form a column of solution therein; control liquid in said second leg forming a column of control liquid therein; and sensor means to sense changes in the level of the column of control liquid, said sensor means adapted to actuate said actuated means.
Claim 4
Independent Claim
146 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; outer and inner tubular members arranged to form an annular flow passage having an open upper end; means to admit solution into the annular flow passage such that a portion of the solution flows into the inner tubular member; actuated means adapted to admit first liquid into the reservoir; a U-shaped tube having first and second legs, each of said legs being opened to atmosphere; a tube secured between said inner tubular member and said first leg to admit solution to said first leg to form a column of solution therein; control liquid in said second leg forming a column of control liquid therein; and sensor means to sense changes in the level of the column of control liquid, said sensor means adapted to actuate said actuated means.
Claim 5
Dependent Claim
22 words
The combination called for in claim 2 with the addition of a flow restrictor arranged to regulate flow through the inner tube.
Claim 6
Dependent Claim
39 words
The combination called for in claim 2 wherein the sensor means comprises an electrode; means to secure the electrode relative to the second leg of the U-shaped tube; and means associated with said electrode for actuating the actuated means.
Claim 7
Dependent Claim
44 words
The combination called for in claim 4 wherein the means to secure the electrode comprises a cap secured to the upper end of the second leg, said cap having a vent opening formed therein; and means to adjustably secure the electrode to the cap.
Claim 8
Independent Claim
119 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; means for admitting the solution into the reservoir; actuated means adapted to admit first liquid into the reservoir; a U-shaped tube having first and second legs, each of said legs being opened to atmosphere; means to admit solution to said first legs to form a column of solution therein; control liquid in said second leg forming a column of control liquid therein; an electrode, means to secure the electrode relative to the second leg of the U-shaped tube to sense changes in the level of the column of control liquid; and means associated with said electrode for actuating the actuated means.
Claim 9
Independent Claim
119 words
A device for controlling the specific gravity of a solution of first and second liquids comprising: a reservoir; means for admitting the solution into the reservoir; actuated means adapted to admit first liquid into the reservoir; a U-shaped tube having first and second legs, each of said legs being opened to atmosphere; means to admit solution to said first legs to form a column of solution therein; control liquid in said second leg forming a column of control liquid therein; an electrode, means to secure the electrode relative to the second leg of the U-shaped tube to sense changes in the level of the column of control liquid; and means associated with said electrode for actuating the actuated means.
Claim 10
Dependent Claim
30 words
The combination called for in claim 6 wherein the means to admit solution to the first leg includes means to provide a uniform flow of solution through the first leg.
Claim 11
Dependent Claim
26 words
The combination called for in claim 6 with the addition of means associated with said first leg to adjust the height of the column of solution.
Claim 12
Dependent Claim
32 words
The combination called for in claim 6 with the addition of a mixing chamber adapted to mix the first liquid with the solution before the first liquid is admitted into the reservoir.
Claim 13
Dependent Claim
30 words
The combination called for in claim 9 wherein the means to admit solution into the reservoir comprises a pump arranged to cIrculate solution from the reservoir to the mixing chamber.
Claim 14
Dependent Claim
20 words
The combination called for in claim 10 with the addition of filter means between the reservoir and the mixing chamber.
Claim 15
Dependent Claim
24 words
The combination called for in claim 6 with the addition of means adapted to provide visual indication of the specific gravity of the solution.
Claim 16
Dependent Claim
43 words
The combination called for in claim 6 wherein the first and second legs are connected by a conduit arranged such that an interface formed between the solution and the control liquid moves longitudinally of the conduit as specific gravity of the solution changes.
Claim 17
Dependent Claim
44 words
The combination called for in claim 6 wherein the means to secure the electrode comprises: a cap secured to the upper end of the second leg, said cap having a vent opening formed therein; and means to adjustably secure the electrode to the cap.
Claim 18
Dependent Claim
43 words
The combination called for in claim 6 wherein the actuated means comprises valve means; and current responsive actuating means associated with the valve means adapted to open said valve means responsive to a change in the level of the column of control liquid.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |