Patent US3749246A successfully refreshed from Google Patents.
US3749246A
Expired / Lapsed
US
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Overflow arrangement
Assignee: HARGRAVES BEATRICE A
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Filing: 1971-04-19
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Granted: 1973-07-31
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Expires: 1991-04-19
Abstract
Abstract An aerobic sewage treatment system includes a plurality of series-connected aerated digestion chambers. In order to prevent passage of solids from one chamber to the next downstream chamber the liquid connection between the chambers is formed by a specially shaped conduit having an open inlet end disposed within a quiet portion of its respective chamber.
Inventors
- 👤 W Hargraves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:52
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/121; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A digestion treatment system for purifying organic waste material dissolved in or dispersed in water comprising: walls defining a main digestion chamber having inlet means for receiving organic waste material and walls defining a plurality of separate secondary digestion chambers, each of said secondary chambers including baffle means dividing the chamber into an agitating and aerating portion and a smaller quiet portion which are in communication with each other only through a submerged passageway of relatively small cross-sectional area; means in each agitating and aerating portion for introducing air bubbles into the liquid in that portion and for mixing the entire liquid contents of that portion; and conduit means for connecting the quiet portion of each secondary chamber to the aerating portion of one other chamber to thereby provide for flow of liquid waste from the main chamber sequentially through the secondary chambers to an outlet means, each conduit means having an unobstructed bore and including a horizontally facing inlet aperture disposed below the liquid level in the quiet portion of the respective secondary chamber, a vertical tubular portion extending upwardly through the liquid surface, and a horizontally facing outlet aperture disposed at the liquid level in the aerating portion of the downstream chamber.
Claim 2
Dependent Claim
204 words
A digestion treatment system for purifying organic waste material dissolved in or dispersed in water comprising: walls defining a main digestion chamber having inlet means for receiving organic waste material and walls defining a plurality of separate secondary digestion chambers, each of said secondary chambers including baffle means dividing the chamber into an agitating and aerating portion and a smaller quiet portion which are in communication with each other only through a submerged passageway of relatively small cross-sectional area; means in each agitating and aerating portion for introducing air bubbles into the liquid in that portion and for mixing the entire liquid contents of that portion; and conduit means for connecting the quiet portion of each secondary chamber to the aerating portion of one other chamber to thereby provide for flow of liquid waste from the main chamber sequentially through the secondary chambers to an outlet means, each conduit means having an unobstructed bore and including a horizontally facing inlet aperture disposed below the liquid level in the quiet portion of the respective secondary chamber, a vertical tubular portion extending upwardly through the liquid surface, and a horizontally facing outlet aperture disposed at the liquid level in the aerating portion of the downstream chamber.
Claim 3
Dependent Claim
102 words
Apparatus as in claim 1 wherein each said baffle means which divides a secondary chamber into an aerating portion and a quiet portion includes a downwardly concave baffle having an upper end disposed at about liquid level and a lower end disposed below the respective conduit means and wherein the respective aerating and mixing means includes means for introducing air bubbles into the bottom of the aerating portion at a location remote from the respective conduit means and an additional concave baffle which directs the rising air bubbles toward said first-named baffle as the bubbles approach roach the surface of the liquid.
Claim 4
Dependent Claim
51 words
Apparatus as in claim 2 wherein the quiet portion of each secondary chamber is defined between an upright wall of that chamber and said first-named baffle and wherein the passageway between the chamber portions is defined by a space betwen said upright wall and the lower end of said first-named baffle.
Claim 5
Dependent Claim
24 words
Apparatus as in claim 1 wherein each said conduit means is formed as a double elbow with the inlet and outlet apertures facing downstream.
Claim 6
Dependent Claim
35 words
Apparatus as in claim 4 including an inclined baffle disposed below the inlet aperture of each conduit means and extending downwardly from a point downstream of the aperture to a point upstream of the aperture.
Claim 7
Dependent Claim
37 words
Apparatus as in claim 5 wherein each chamber is separated from the adjacent downstream chamber by a common vertical wall, said conduit means being located at the common wall, and said baffle extending from the common wall.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |