US3788472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste water process tank control facility
Assignee: CARTER R CO
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Filing: 1972-02-03
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Granted: 1974-01-29
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Expires: 1992-02-03
Abstract
Abstract A control facility for a waste water process tank having a normal operating mode wherein the system shuts down and indicates ''''fault'''' on malfunction and provides a stepped, sequential trouble shooting procedure for determining the fault and provides for temporary operation or partial operation of the system until the fault is corrected. The system is directed toward use in waste water treatment plants which utilize liquid mixing or liquid mixing and heating tanks.
Inventors
- 👤 W Boschen
- 👤 O Grieshaber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:10
CPC Classifications
H; H02; H02H; H02H5/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
In a waste water treatment system having a tank for receiving and treating the water and/or sludge to be treated and a plurality of mixers mounted in the tank to be operated in accordance with a predetermined program, the improvement which comprises: at least one compressor driven by an electric motor; an indicator connected to the electric motor to indicate when the motor is running; a gas manifold connected to the output of the compressor; a plurality of valves and gas lines connected to the gas manifold, there being one valve and one gas line for each mixer each such valve being connected to its associated mixer; means for supplying gas to the input of the compressor; a suction pressure sensor mounted in the means for supplying gas to the compressor for determining when the pressure is below a certain predetermined value; a discharge pressure sensor mounted between the compressor and the manifold for determining when the pressure therein is between predetermined limits; an indicator connected to each of the valves of the plurality of valves to indicate that the particular valve is open and gas is being supplied to the associated mixer; a control system connected to the sensors to shut down the system when any of the sensors detects an out of limit condition and to display the fact that the particular sensor has detected an out of limit condition; and an indicator connected to the system to display the fact that an out of limit condition exists.
Claim 2
Dependent Claim
250 words
In a waste water treatment system having a tank for receiving and treating the water and/or sludge to be treated and a plurality of mixers mounted in the tank to be operated in accordance with a predetermined program, the improvement which comprises: at least one compressor driven by an electric motor; an indicator connected to the electric motor to indicate when the motor is running; a gas manifold connected to the output of the compressor; a plurality of valves and gas lines connected to the gas manifold, there being one valve and one gas line for each mixer each such valve being connected to its associated mixer; means for supplying gas to the input of the compressor; a suction pressure sensor mounted in the means for supplying gas to the compressor for determining when the pressure is below a certain predetermined value; a discharge pressure sensor mounted between the compressor and the manifold for determining when the pressure therein is between predetermined limits; an indicator connected to each of the valves of the plurality of valves to indicate that the particular valve is open and gas is being supplied to the associated mixer; a control system connected to the sensors to shut down the system when any of the sensors detects an out of limit condition and to display the fact that the particular sensor has detected an out of limit condition; and an indicator connected to the system to display the fact that an out of limit condition exists.
Claim 3
Dependent Claim
72 words
The invention of claim 1 including: a second compressor driven by an electric motor connected to the means for supplying gas and the gas manifold; an indicator connected to the electric motor of the second compressor to indicate that said motor is running; and means in the control system for controlling the operation of the compressors so that one or both of them operate in accordance with the demands of the system.
Claim 4
Dependent Claim
212 words
The invention of claim 2 including: a boiler having means for receiving cold water and a pump connected to its output for delivering hot water; a water manifold and a line connected between the pump and the water manifold; a temperature sensor connected in said line for determining when the temperature of the water in the line is over a predetermined value and connected to the control system to thereby shut down the system and to display the fact that the temperature of the water is above said value; a water flow sensor connected in said line for determining when the water flow in said line is below a certain predetermined value and connected to the control system to thereby shut down the system and to display the fact that the flow of the water is below said value; a pump indicator to display the fact that the pump is running; an aquastat mounted in the tank connected to the control system and then to the pump to turn on the pump when the temperature in the tank is below a predeterMined value; a plurality of water lines connected to the water manifold, there being one water line for each such mixer; each such water line being connected to its associated mixer.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |