US3586296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing a flow of liquid of linearly varying density
Assignee: INGENJORSFIRMA CONSULTA
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Filing: 1969-03-28
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Granted: 1971-06-22
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Expires: 1989-03-28
Abstract
Abstract An improved constant density gradient mixer comprises two open vessels communicating at their bottoms, one of which vessels having a constant free cross-sectional area ''''A'''' and being equipped with stirring means and an exit tube. The other vessel has a variable free cross-sectional area A/f(x) the function f varying with the height x essentially as demanded by the equation f(x) 1 X x/a WHERE THE DISTANCE A IS DEFINED BY THE EQUATION A ViP0/8A ( Delta P)1, in which Vi is the total initial volume, Po is the density in the vessel without stirrer, and Pi is the density in the vessel with stirrer.
Inventors
- 👤 Svante Harry Rilbe
- 👤 Olaf A Vesterberg
- 👤 Sune Pettersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/80; B01F35/81
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
A device according to claim 1 characterized in that the variable free cross section is circular with the radius r A/ pi f
Claim 2
Dependent Claim
47 words
A device according to claim 1 in which the two vessels and the stirrer have constant cross-sectional areas, characterized by a plunger submerged into the vessel without stirrer, its variable cross-sectional area P essentially satisfying the equation: P C-A/f where C is the cross-sectional area without stirrer.
Claim 3
Dependent Claim
43 words
A device according to claim 3 comprising two vessels of the same cross-sectional area C, in one vessel a stirrer of a constanT cross-sectional area S, in the other a plunger characterized by circular horizontal sections with a radius b satisfying the equation:
Claim 4
Dependent Claim
36 words
A device according to claim 3 comprising alternate plungers for different positive as well as negative, values of the distance a, characterized by a constant base area identical with the constant cross-sectional area of the stirrer.
Claim 5
Dependent Claim
39 words
A device according to claim 1 characterized by the communicating duct between the vessels having an upward bend in the case of a falling and a downward bend in the case of a rising density in the outflowing liquid.
Claim 6
Dependent Claim
33 words
A device according to claim 6 characterized by a communicating duct between the vessels comprising a stopcock with a bent flow-through channel, this stopcock being turnable between an upward and a downward bend.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |