US3552566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse osmosis system for concentrating liquid foods
Assignee: United States Department of Agriculture
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Filing: 1969-02-18
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Granted: 1971-01-05
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Expires: 1989-02-18
Abstract
Abstract Process and apparatus by which concentrated products produced at high pressures within a reverse osmosis concentrator may be withdrawn at a predetermined degree of concentration and without damage to their intrinsic properties even though they exhibit non-Newtonian properties. The invention is of particular importance in preparing concentrated products from liquid foods such as juices, lacteal fluids, egg white, etc.
Inventors
- 👤 Edison Lowe
- 👤 Everett L Durkee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/90; A23C; A23C9/00; A23C9/14; A23C9/142; A23C9/1427; A23L; A23L5/00; A23L5/51; B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; Y; Y10; Y10S; Y10S159/00; Y10S159/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
The apparatus of claim 1 wherein the flow control means of section f includes means for depressurizing the concentrate while in a condition of zero flow, whereby to avoid damage to its properties.
Claim 2
Dependent Claim
18 words
The apparatus of claim 1 wherein means is provided for depressurizing the concentrate while in a static condition.
Claim 3
Dependent Claim
172 words
Apparatus for concentrating a liquid food by reverse osmosis which comprises: a. a reverse osmosis concentrator; b. means communicating with said concentrator for feeding it with the liquid food under superatmospheric pressure; c. a first outlet communicating with said concentrator for discharge of permeate water; d. metering for metering the discharge of water through said first outlet; e. a second outlet communicating with said concentrator for removal of concentrate under superatmospheric pressure; f. a cylinder containing a movable piston; g. a conduit connecting said second outlet with the cylinder, and having a valve interposed therein; h. means cooperative with said metering means for periodically opening said valve in response to discharge of a predetermined amount of permeate water, whereby to permit entry of concentrate into said cylinder, the pressure of the entering concentrate causing movement of said piston; i. means cooperative with the movement of said piston for closing said valve when the cylinder has received a predetermined amount of concentrate; and j. means for ejecting the depressurized concentrate from said cylinder.
Claim 4
Dependent Claim
23 words
The apparatus of claim 4 wherein means is provided for depressurizing the concentrate while it is in a static condition in said cylinder.
References Cited (Backward Citations)
US1825631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |