Patent US5415175A successfully refreshed from Google Patents.
US3721344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating waste water
Assignee: POLLUTROL IND Inc
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Filing: 1971-07-22
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Granted: 1973-03-20
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Expires: 1991-07-22
Abstract
Abstract Water treating apparatus is disclosed that has a first chamber to receive the waste water, a second chamber having a discharge provided with an overflow inlet and an expansion chamber extending downwardly into it to receive within it part of the second chamber contents, and means to transfer first chamber contents into the second chamber. Aeration may be effected in both chambers and when the transfer means into the second chamber and the second chamber aerating means are not working, the second chamber functions as a settling chamber. Means are provided then to deliver air into the expansion chamber to force water out of it thus to raise the second chamber level to cause an overflow through the discharge, the overflow being relatively clear after a predetermined settling interval.
Inventors
- 👤 K Rost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:33
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; C02F3/006; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
195 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharge having an inlet above a predetermined high water level therein and an expansion chamber opening into the second chamber below said level to receive part of the second chamber liquid within it, aerating means for each chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means to vent air from the expansion chamber, and control means for the expansion chamber to deliver air into said expansion chamber and operable to force liquid downwardly therefrom thereby to raise the water level in the second chamber externally of the expansion chamber to overflow said discharge inlet and to vent the expansion chamber from the second chamber to lower the water level therein whereby with the transfer means and the aerating means for the second chamber inoperative the second chamber functions as a settling chamber and with the air delivery means to the expansion chamber operating and the vent means inoperative the displacement of the expansion chamber contents causes the overflow of the relatively clear water into the discharge.
Claim 2
Dependent Claim
195 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharge having an inlet above a predetermined high water level therein and an expansion chamber opening into the second chamber below said level to receive part of the second chamber liquid within it, aerating means for each chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means to vent air from the expansion chamber, and control means for the expansion chamber to deliver air into said expansion chamber and operable to force liquid downwardly therefrom thereby to raise the water level in the second chamber externally of the expansion chamber to overflow said discharge inlet and to vent the expansion chamber from the second chamber to lower the water level therein whereby with the transfer means and the aerating means for the second chamber inoperative the second chamber functions as a settling chamber and with the air delivery means to the expansion chamber operating and the vent means inoperative the displacement of the expansion chamber contents causes the overflow of the relatively clear water into the discharge.
Claim 3
Dependent Claim
59 words
The water treatment plant of claim 1 and means in control of the operation of the transfer means to initiate its operation when a predetermined high water level exists in the first chamber and a predetermined low water level exists in the second chamber and to terminate its operation when the high level is attained in the second chamber.
Claim 4
Dependent Claim
35 words
The water treatment plant of claim 2 and a control for the second chamber aerator operated by the means in control of the transfer means when the high level in the second chamber is attained.
Claim 5
Dependent Claim
39 words
The water treatment plant of claim 2 in which the second chamber aerator includes a normally open, solenoid operated valve and a circuit to the solenoid includes switch means operated by the means in control of the transfer means.
Claim 6
Dependent Claim
23 words
The water treatment plant of claim 4 in which the switch means is also responsive to the water level in the first chamber.
Claim 7
Dependent Claim
49 words
The water treatment plant of claim 2 in which the transfer means is a conduit, an air delivery conduit is in communication with the interior thereof to force liquid through and includes a normally closed, solenoid and switch means responsive to a low water level in the second chamber.
Claim 8
Dependent Claim
58 words
The water treatment plant of claim 1 in which the means to deliver air to the expansion chamber also includes a vent and a normally open, solenoid operated valve in control of said vent whereby the expansion chamber is normally vented, timing means, and a circuit controlled by the timing means includes the solenoid of the vent-controlling valve.
Claim 9
Dependent Claim
33 words
The water treatment plant of claim 1 in which the control means for the expansion chamber are operable in the alternative to deliver air into the expansion chamber and to vent air therefrom.
Claim 10
Dependent Claim
18 words
The water treatment plant of claim 7 and timing means in control of the expansion chamber control means.
Claim 11
Dependent Claim
27 words
The water treatment plant of claim 8 in which the air delivery means includes a valve adjustable to control the flow of air to the expansion chamber.
Claim 12
Dependent Claim
50 words
The water treatment plant of claim 1 in which the second chamber has a series of pivoted, parallel slat members above the second chamber aerating means, and operating means operable to turn the slat members between vertical and horizontal positions, in their horizontal position, the slat members providing a floor.
Claim 13
Dependent Claim
106 words
The water treatment plant of claim 5 in which the second chamber has a series of pivoted, parallel slat members above the second chamber aerating means, means operable to turn the slat meMbers between vertical and horizontal positions, said member turning means including a control member having a first position in which the slat members are vertical and a solenoid operable to move the control member into a second position in which the horizontal positions of the slat members is effected, a circuit controlled by the switch means including said solenoid and is closed with respect thereto when predetermined high water levels exist in both chambers.
Claim 14
Dependent Claim
38 words
The water treatment plant of claim 1 and a contuit extending from a point near the bottom of the expansion chamber above the high water level in the second chamber to prevent turbulence that would disturb settled solids.
Claim 15
Dependent Claim
37 words
The water treatment plant of claim 1 in which the second chamber has an open discharge extending lengthwise thereof above the high water level therein into which water overflows as water is expelled from the expansion chamber.
Claim 16
Dependent Claim
22 words
The water treatment plant of claim 1 in which a scum barrier extends lengthwise of the second chamber close to the discharge.
Claim 17
Dependent Claim
50 words
The water treatment plant of claim 1 in which the second chamber includes a lengthwise partition terminating above the bottom thereof but below the low water level therein and an air tight cover closes the space between the partition and the side of the second chamber opposite the transfer means.
Claim 18
Dependent Claim
123 words
The water treatment plant of claim 1 and a normally open valve in control of the second chamber aerating means and including a valve-closing solenoid, a normally closed valve in control of the transfer means and including a valve-opening solenoid, the control means for the expansion chamber are normally operative to vent the expansion chamber and include solenoid means which when energized operate the control means to deliver therein liquid expelling air, and a control circuit including switch means responsive to the water level in the two chambers and operable to energize the solenoid of the transfer means when a high water level exists only in the first chamber, to energize the solenoid means when a high water level exists in both chambers.
Claim 19
Dependent Claim
20 words
The water treatment plant of claim 17 in which the circuit includes timing means in control of the solenoid means.
Claim 20
Dependent Claim
32 words
The water treatment plant of claim 18 in which the timing means provide first a predetermined settling interval and then a predetermined interval in which air is delivered into the expansion chamber.
Claim 21
Dependent Claim
63 words
The water treatment plant of claim 19 in which there is a common air source for the aerating means, the transfer means, and the air delivery means, the air source includes an electric motor and an operating circuit therefor including a timer whereby both chambers are periodically subjected to aeration and the control circuit includes the motor when the solenoid means is energized.
Claim 22
Dependent Claim
85 words
The water treatment plant of claim 19 in which the second chamber has a series of pivoted, parallel slat members above the second chamber aerating means, operating means to turn the slat members between vertical and horizontal positions, in their horizontal positions, the slat members providing a floor, means normally holding the slat members in their vertical positions and including a solenoid to effect their horizontal positions when energized, and the circuit includes that solenoid during the interval air is delivered into the expansion chamber.
Claim 23
Dependent Claim
153 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharging means, a timed aerator in communication with the second chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means in control of the operation of the transfer means to initiate its operation when a predetermined high water level exists in the first chamber and a predetermined low water level exists in the second chamber and to terminate its operation when a predetermined high level is attained in the second chamber, and a control opErated when the high level in the first chamber is attained first to terminate aeration in the second chamber for a predetermined interval and then also to operate said discharging means for the balance of that interval whereby said second chamber operates both as an aeration chamber and a settling chamber.
Claim 24
Dependent Claim
153 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharging means, a timed aerator in communication with the second chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means in control of the operation of the transfer means to initiate its operation when a predetermined high water level exists in the first chamber and a predetermined low water level exists in the second chamber and to terminate its operation when a predetermined high level is attained in the second chamber, and a control opErated when the high level in the first chamber is attained first to terminate aeration in the second chamber for a predetermined interval and then also to operate said discharging means for the balance of that interval whereby said second chamber operates both as an aeration chamber and a settling chamber.
Claim 25
Dependent Claim
26 words
The treatment plant of claim 22 in which there is also an aerator in communication with the first chamber and both aerators include a common source.
Claim 26
Dependent Claim
149 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharging means, a timed aerator in communication with the second chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means in control of the operation of the transfer means to initiate its operation when a predetermined high water level exists in the first chamber and a predetermined low water level exists in the second chamber and to terminate its operation when a predetermined high level is attained in the second chamber and a control operated first to aerate said second chamber then to terminate aeration in the second chamber for a predetermined interval, and then also to operate said discharging means for the balance of that interval whereby said second chamber operates both as an aeration chamber and a settling chamber.
Claim 27
Dependent Claim
149 words
A water treatment plant comprising a first chamber for the reception of waste water, a second chamber including a discharging means, a timed aerator in communication with the second chamber, means in communication with both chambers and operable to transfer first chamber contents into the second chamber, means in control of the operation of the transfer means to initiate its operation when a predetermined high water level exists in the first chamber and a predetermined low water level exists in the second chamber and to terminate its operation when a predetermined high level is attained in the second chamber and a control operated first to aerate said second chamber then to terminate aeration in the second chamber for a predetermined interval, and then also to operate said discharging means for the balance of that interval whereby said second chamber operates both as an aeration chamber and a settling chamber.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |