US4537679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conservation of momentum in a barrier oxidation ditch
Assignee: Individual
•
Filing: 1982-09-30
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Granted: 1985-08-27
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Expires: 2002-09-30
Abstract
Abstract A mixing-control apparatus for continuously moving mixed liquor having translational-flow momentum within an endless channel of a closed-circuit oxidation ditch, conserves at least of the portion of the momentum by enabling induced flow of the mixed liquor through adjustable openings in the barrier.
Inventors
- 👤 John H. Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:54
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1257; C02F3/20; C02F3/205; C02F3/207; C02F3/30; C02F3/301; C02F3/302; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/926; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
156 words
A mixing-control apparatus which comprises, in combination with an endless channel of a closed-circuit oxidation ditch: (a) a barrier, sealably attached to the bottom and sides of said channel, for dividing said channel into an intake channel portion and a discharge channel portion, said barrier having at least one aperture therethrough for providing substantially translational fluid flow communication between said intake channel and said discharge channel, thereby conserving momentum of fluid flowing is said channel by enabling induced fluid-flow therebetween; (b) means for adjustably opening and closing said at least one aperture; and (c) at least one pump assembly which comprises a motor having a shaft, an impeller attached to said shaft, and a discharge duct within which said impeller operates and which has an intake end and a discharge end, said intake end being within said intake channel portion and said discharge end being within said discharge channel portion thereby enabling a pumped fluid-flow therebetween.
Claim 2
Dependent Claim
156 words
A mixing-control apparatus which comprises, in combination with an endless channel of a closed-circuit oxidation ditch: (a) a barrier, sealably attached to the bottom and sides of said channel, for dividing said channel into an intake channel portion and a discharge channel portion, said barrier having at least one aperture therethrough for providing substantially translational fluid flow communication between said intake channel and said discharge channel, thereby conserving momentum of fluid flowing is said channel by enabling induced fluid-flow therebetween; (b) means for adjustably opening and closing said at least one aperture; and (c) at least one pump assembly which comprises a motor having a shaft, an impeller attached to said shaft, and a discharge duct within which said impeller operates and which has an intake end and a discharge end, said intake end being within said intake channel portion and said discharge end being within said discharge channel portion thereby enabling a pumped fluid-flow therebetween.
Claim 3
Dependent Claim
27 words
The mixing-control apparatus in accordance with claim 1 wherein said means for adjustably opening and closing said at least one aperture comprises at least one sliding gate.
Claim 4
Dependent Claim
19 words
The mixing-control apparatus in accordance with claim 1 wherein said at least one aperture is substantially rectangular in shape.
Claim 5
Dependent Claim
25 words
The mixing-control apparatus in accordance with claim 1 wherein said discharge duct passes beneath said barrier and is embedded within said bottom of said channel.
Claim 6
Dependent Claim
35 words
The mixing-control apparatus in accordance with claim 4 wherein said pump assembly is provided with aeration means which is disposed within said discharge duct and which is connected to means for supplying an oxygen-containing gas.
Claim 7
Dependent Claim
25 words
The mixing-control apparatus of claim 1, additionally comprising aeration means substantially aligned with said at least one aperture for aeration of said fluid flowing therethrough.
Claim 8
Dependent Claim
16 words
The mixing-control apparatus of claim 6 wherein said aeration means comprises an eddy jet aerator assembly.
Claim 9
Dependent Claim
100 words
In an oxidation ditch including an endless channel for conducting liquid therearound; a barrier sealably disposed athwart said channel for dividing said channel into an intake channel portion and a discharge channel portion; and at least one pump/aerator assembly for pumping said liquid from said intake channel portion to said discharge channel portion and aerating said pumped liquid; an improvement comprising: (a) at least one aperture disposed through said barrier for permitting induced flow of said liquid from said intake channel portion to said discharge channel portion; and (b) means for adjustably opening and closing said at least one aperture.
Claim 10
Dependent Claim
100 words
In an oxidation ditch including an endless channel for conducting liquid therearound; a barrier sealably disposed athwart said channel for dividing said channel into an intake channel portion and a discharge channel portion; and at least one pump/aerator assembly for pumping said liquid from said intake channel portion to said discharge channel portion and aerating said pumped liquid; an improvement comprising: (a) at least one aperture disposed through said barrier for permitting induced flow of said liquid from said intake channel portion to said discharge channel portion; and (b) means for adjustably opening and closing said at least one aperture.
Claim 11
Dependent Claim
27 words
An oxidation ditch in accordance with claim 8 wherein said means for adjustably opening and closing said at least one aperture comprises at least one sliding gate.
Claim 12
Dependent Claim
20 words
An oxidation ditch in accordance with claim 9 wherein said sliding gate and said aperture are substantially rectangular in shape.
References Cited (Backward Citations)
GB191400729A
Cited
US1286017A
Cited
CH305429A
Cited
CH374032A
Cited
CH502119A
Cited
US3771724A
Cited
HU166160B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |