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US3915862A
Expired / Lapsed
US
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Submerged air release device particularly for sewage treatment
Assignee: Siemens Water Technologies Holding Corp
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Filing: 1974-06-24
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Granted: 1975-10-28
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Expires: 1994-06-24
Abstract
Abstract A molded plastic oblong box having an open bottom and sideward air outlets is attached to the air supply header of an aeration tank for sewage treatment. The outlets are staggered for lateral distribution of the air received from the header. The box is set lengthwise relative to the circulatory flow which the released air maintains in the tank for mixing. This flow extends into and keeps the lower end of the box from becoming clogged and closed.
Inventors
- 👤 John I Moloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:56
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23124; B01F23/23125; B01F23/23126; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
IN COMBINATION WITH A TANK FOR THE AERATION SEWAGE, A SUBMERGED HORIZONTAL AIR SUPPLY HEADER FOR THE DISCHARGE OF AIR FROM SPACED ORIFICIES ARRANGED IN A GENERAL LINE WITHIN THE TANK SUCH THAT THE RISING AIR BUBBLES INDUCE A GENERAL ROLLING MOTION OF THE SEWAGE WHICH SWEEPS ACROSS THE FLOOR OF THE TANK TOWARD THE HEADER, AND A PLURALITY OF AIR DIFFUSER DEVICES ATTACHED TO THE HEADER AND COMMUNICATING THEREWITH THROUGH CORRESPONDING OPENINGS IN THE WALL OF THE HEADER, THE IMPROVEMENT WHEREIN EACH DIFFUSER COMPRISES A BOX-LIKE STRUCTURE INCLUDING A TOP, SIDE AND END WALLS FORMING A CHAMBER WHICH OPENS DOWNWARDLY AND HAVING A NUMBER OF ORIFICES NEAR ITS TOP, SAID ORIFICES BEING THE SPACED ORIFICES REFERRED TO, IN NORMAL OPERATION THE LOWER PORTION OF THE CHAMBER BEING PARTIALLY FILLED WITH SEWAGE UP TO THE HYDROSTATIC PRESSURE LEVEL OF THE AIR SUPPLY BUT BELOW SUCH ORIFICES, THE ENTIRE LOWER END OF THE DIFFUSER AT LEAST ON EACH SIDE OF THE HEADER BEING OPEN AND OF SUBSTANTIAL HORIZONTAL LENGTH NORMAL TO THE HEADER AND NEAR THE FLOOR OF THE TANK SUCH THAT THE SWEEP OF THE SEWAGE TOWARD THE HEADER EXTENDS TO THE AIR-SEWAGE INTERFACE IN THE DIFFUSER CHAMBER AND PREVENTS THE ACCUMULATION OF BIOLOGICAL SLIME THEREIN.
Claim 2
Dependent Claim
206 words
IN COMBINATION WITH A TANK FOR THE AERATION SEWAGE, A SUBMERGED HORIZONTAL AIR SUPPLY HEADER FOR THE DISCHARGE OF AIR FROM SPACED ORIFICIES ARRANGED IN A GENERAL LINE WITHIN THE TANK SUCH THAT THE RISING AIR BUBBLES INDUCE A GENERAL ROLLING MOTION OF THE SEWAGE WHICH SWEEPS ACROSS THE FLOOR OF THE TANK TOWARD THE HEADER, AND A PLURALITY OF AIR DIFFUSER DEVICES ATTACHED TO THE HEADER AND COMMUNICATING THEREWITH THROUGH CORRESPONDING OPENINGS IN THE WALL OF THE HEADER, THE IMPROVEMENT WHEREIN EACH DIFFUSER COMPRISES A BOX-LIKE STRUCTURE INCLUDING A TOP, SIDE AND END WALLS FORMING A CHAMBER WHICH OPENS DOWNWARDLY AND HAVING A NUMBER OF ORIFICES NEAR ITS TOP, SAID ORIFICES BEING THE SPACED ORIFICES REFERRED TO, IN NORMAL OPERATION THE LOWER PORTION OF THE CHAMBER BEING PARTIALLY FILLED WITH SEWAGE UP TO THE HYDROSTATIC PRESSURE LEVEL OF THE AIR SUPPLY BUT BELOW SUCH ORIFICES, THE ENTIRE LOWER END OF THE DIFFUSER AT LEAST ON EACH SIDE OF THE HEADER BEING OPEN AND OF SUBSTANTIAL HORIZONTAL LENGTH NORMAL TO THE HEADER AND NEAR THE FLOOR OF THE TANK SUCH THAT THE SWEEP OF THE SEWAGE TOWARD THE HEADER EXTENDS TO THE AIR-SEWAGE INTERFACE IN THE DIFFUSER CHAMBER AND PREVENTS THE ACCUMULATION OF BIOLOGICAL SLIME THEREIN.
Claim 3
Dependent Claim
145 words
An improved air diffuser for attachment to the air supply header of a sewage aeration tank, said diffuser comprising a box-like structure including a top, side and end walls forming a chamber which opens downwardly and having a number of orifices near its top, in normal operation the lower portion of the chamber being partially filled with sewage up to the hydrostatic pressure level of the air supply but below such orifices, the entire lower end of the diffuser at least on each side of the header being open and of substantial horizontal length normal to the header such that with the header located in the tank so that a circulatory motion is provided by the air bubbles discharged therein the sweep of the sewage toward the header extends to the air-sewage interface in the diffuser chamber and prevents the accumulation of biological slime thereiN.
Claim 4
Dependent Claim
145 words
An improved air diffuser for attachment to the air supply header of a sewage aeration tank, said diffuser comprising a box-like structure including a top, side and end walls forming a chamber which opens downwardly and having a number of orifices near its top, in normal operation the lower portion of the chamber being partially filled with sewage up to the hydrostatic pressure level of the air supply but below such orifices, the entire lower end of the diffuser at least on each side of the header being open and of substantial horizontal length normal to the header such that with the header located in the tank so that a circulatory motion is provided by the air bubbles discharged therein the sweep of the sewage toward the header extends to the air-sewage interface in the diffuser chamber and prevents the accumulation of biological slime thereiN.
Claim 5
Dependent Claim
187 words
An improved air diffuser adapted to be attached to a round air header pipe for connection to the air supply therein and having a number of orifices for the submerged discharge of diffused air in a tank for the biological treatment of sewage and for keeping the settleable material in suspension by inducing a rolling motion of the sewage, said diffuser being of the type having a downwardly open extension in which the air and sewage have an interface at the hydrostatic pressure level of the air supply, said diffuser being in the form of a hollow box having an upper section including a centrally located short vertical inlet stem adapted to be extended through a vertical opening formed in the pipe and at least one downwardly extending section, said diffuser having a number of air outlets near the upper section, each downward opening section having vertical sides and being of substantial length normal to the header and entirely open at its lower end whereby the rolling motion of the sewage extends into said downward section and prevents the organic material of the sewage from accreting therein.
Claim 6
Dependent Claim
187 words
An improved air diffuser adapted to be attached to a round air header pipe for connection to the air supply therein and having a number of orifices for the submerged discharge of diffused air in a tank for the biological treatment of sewage and for keeping the settleable material in suspension by inducing a rolling motion of the sewage, said diffuser being of the type having a downwardly open extension in which the air and sewage have an interface at the hydrostatic pressure level of the air supply, said diffuser being in the form of a hollow box having an upper section including a centrally located short vertical inlet stem adapted to be extended through a vertical opening formed in the pipe and at least one downwardly extending section, said diffuser having a number of air outlets near the upper section, each downward opening section having vertical sides and being of substantial length normal to the header and entirely open at its lower end whereby the rolling motion of the sewage extends into said downward section and prevents the organic material of the sewage from accreting therein.
Claim 7
Dependent Claim
202 words
An improved air diffuser adapted to be attached to a round air header pipe for connection to the air supply therein and having a number of orifices for the submerged discharge of diffused air in a tank for the biological treatment of sewage and for keeping the settleable material in suspension by inducing a rolling motion of the sewage, said diffuser being of the type having a downwardly open extension in which the air and sewage have an interface at the hydrostatic pressure level of the air supply, said diffuser being in the form of a hollow box having an upper section including a centrally located short inlet stem adapted to be extended downwardly through an opening formed in the top of the pipe and two downwardly extending sections having circularly shaped sides extending from the stem and adapted to snap over the pipe for its securement thereto, said diffuser having a number of air outlets near the upper section, each downward opening section having vertical sides and being of substantial cross-section and entirely open at their lower ends whereby the rolling motion of the sewage extends into said downward sections and prevents the organic material of the sewage from accreting therein.
Claim 8
Dependent Claim
202 words
An improved air diffuser adapted to be attached to a round air header pipe for connection to the air supply therein and having a number of orifices for the submerged discharge of diffused air in a tank for the biological treatment of sewage and for keeping the settleable material in suspension by inducing a rolling motion of the sewage, said diffuser being of the type having a downwardly open extension in which the air and sewage have an interface at the hydrostatic pressure level of the air supply, said diffuser being in the form of a hollow box having an upper section including a centrally located short inlet stem adapted to be extended downwardly through an opening formed in the top of the pipe and two downwardly extending sections having circularly shaped sides extending from the stem and adapted to snap over the pipe for its securement thereto, said diffuser having a number of air outlets near the upper section, each downward opening section having vertical sides and being of substantial cross-section and entirely open at their lower ends whereby the rolling motion of the sewage extends into said downward sections and prevents the organic material of the sewage from accreting therein.
Claim 9
Dependent Claim
12 words
The diffuser of claim 4 which is of integral, molded plastic construction.
Claim 10
Dependent Claim
40 words
The diffuser of claim 6 wherein the upper section thereof includes arcuate portions which are adapted to fit over a round header to secure itself thereto and the stem within the header opening prevents its rotational displacement about the header.
Claim 11
Dependent Claim
38 words
The diffuser of claim 5 having divergent portions immediate to and below the circularly shaped sides and which are adapted to engage the header and spread the said sides as the header is pushed downwardly into position thereon.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |