Patent US3754741A successfully refreshed from Google Patents.
US3754741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment system
Assignee: PARKER ENG CHEM Inc
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Filing: 1971-09-28
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Granted: 1973-08-28
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Expires: 1991-09-28
Abstract
Abstract A water treatment system for large capacity air conditioning systems or similar heat exchange systems which include a water reservoir, a refrigeration unit, a cooling tower for spraying the water to the reservoir, and water flow means for moving the recirculating water from the reservoir through the refrigeration unit to the cooling tower, and back to the reservoir. Water makeup means is provided for adding additional fresh water to the reservoir, and a water drain system functions to drain away the stale water from the reservoir. Chemical additives pumps function to add chemical compositions to the recirculating water. The chemical additive pumps and water drain system function during the flow of recirculating water through the heat exchanger and during the flow of makeup water to the reservoir.
Inventors
- 👤 C Whitehurst
- 👤 F Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:46
CPC Classifications
F; F28; F28F; F28F25/00; C; C02; C02F; C02F5/00; C02F5/08; C02F2103/00; C02F2103/02; C02F2103/023; C02F2201/00; C02F2201/002; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/46; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499; Y10T137/2514; Y10T137/2521; Y10T137/2526; Y10T137/7287; Y10T137/7306; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
A water treatment system comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir, pump means for recirculating water from said reservoir through said heat exchanger and to said spray means, water makeup means responsive to the level of water in said reservoir for intermittently adding makeup water to said reservoir, water treating means responsive to the flow of water from said water makeup means to said reservoir and to the flow of recirculating water for treating the recirculating water, said water treating means including drain means for draining the recirculating water during less than all of the cycles of operation of said water makeup means, said water makeup means comprising a first mode of operation for maintaining the level of water in said reservoir between first predetermined low and high levels, and a second mode of operation for maintaining the level of water in said reservoir between second predetermined low and high levels.
Claim 2
Dependent Claim
159 words
A water treatment system comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir, pump means for recirculating water from said reservoir through said heat exchanger and to said spray means, water makeup means responsive to the level of water in said reservoir for intermittently adding makeup water to said reservoir, water treating means responsive to the flow of water from said water makeup means to said reservoir and to the flow of recirculating water for treating the recirculating water, said water treating means including drain means for draining the recirculating water during less than all of the cycles of operation of said water makeup means, said water makeup means comprising a first mode of operation for maintaining the level of water in said reservoir between first predetermined low and high levels, and a second mode of operation for maintaining the level of water in said reservoir between second predetermined low and high levels.
Claim 3
Dependent Claim
90 words
The system of claim 1 and wherein said water makeup means comprises a container mounted externally of said reservoir at the desired level of water in said reservoir, a plurality of electrode members suspended in said container and terminating at their lower ends at different elevations, a first pair of said electrodes being operative to control the water level in said reservoir during the first mode of operation and a second pair of electrodes being operative to control the water level in said reservoir during the second mode of operation.
Claim 4
Dependent Claim
144 words
A water control system comprising a reservoir for water or the like, a heat exchange unit, spray means for spraying water to said reservoir, recirculating flow means for moving recirculating the water from said reservoir through said heat exchange unit and to said spray means, and water level control means responsive to the level of water in said reservoir and including first means for adding makeup water to said reservoir when the level of the water goes below a first low level and until the level of the water exceeds a first high level, and including second means for adding makeup water to said reservoir when the level of water goes below a second low level which is lower than said first low level and until the level of the water exceeds a second high level which is higher than said first high level.
Claim 5
Dependent Claim
144 words
A water control system comprising a reservoir for water or the like, a heat exchange unit, spray means for spraying water to said reservoir, recirculating flow means for moving recirculating the water from said reservoir through said heat exchange unit and to said spray means, and water level control means responsive to the level of water in said reservoir and including first means for adding makeup water to said reservoir when the level of the water goes below a first low level and until the level of the water exceeds a first high level, and including second means for adding makeup water to said reservoir when the level of water goes below a second low level which is lower than said first low level and until the level of the water exceeds a second high level which is higher than said first high level.
Claim 6
Dependent Claim
94 words
The control system of claim 3 and wherein said water level control means comprises a container located outside said reservoir, in communication with said reservoir, and positioned at approximately the same height as the desired level of water in said reservoir so that the level of water in said container is the same as the level of water in said reservoir, and a plurality of electrodes suspended in said container with the lower ends of said electrodes being located at said first low level, first high level, second low level, and second high level.
Claim 7
Dependent Claim
78 words
The control system of claim 3 and wherein said water level control means comprises a container located outside said reservoir, in communication with said reservoir and positioned at approximately the same height as the desired level of water in said reservoir, said container including a transparent side wall portion, and a plurality of electrodes suspended in said container with their lower ends terminating at said first low level, first high level, second low level and second high level.
Claim 8
Dependent Claim
36 words
The system of claim 3 and further including water treatment means operative only during the flow of recirculating water and during the flow of makeup water to said reservoir for adding chemicals to the recirculating water.
Claim 9
Dependent Claim
126 words
A water treatment system comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir, recirculating water flow means for moving Recirculating water from said reservoir through said heat exchanger to said spray means, and water treating means responsive to the flow of recirculating water to add chemicals to the recirculating water, said water treating means comprising a bypass flow line communicating at one of its ends with the outlet of said heat exchanger and at its other end with the inlet of said heat exchanger, a mixing chamber in said bypass flow line, and at least one chemical pump having its outlet communicating with said mixing chamber and arranged to inject a chemical into the water flowing through the mixing chamber.
Claim 10
Dependent Claim
126 words
A water treatment system comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir, recirculating water flow means for moving Recirculating water from said reservoir through said heat exchanger to said spray means, and water treating means responsive to the flow of recirculating water to add chemicals to the recirculating water, said water treating means comprising a bypass flow line communicating at one of its ends with the outlet of said heat exchanger and at its other end with the inlet of said heat exchanger, a mixing chamber in said bypass flow line, and at least one chemical pump having its outlet communicating with said mixing chamber and arranged to inject a chemical into the water flowing through the mixing chamber.
Claim 11
Dependent Claim
172 words
In a cooling tower system for an air conditioner or the like comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir and flow means for recirculating water from said reservoir through said heat exchanger and to said spray means, the improvement comprising water makeup means including a first mode of operation responsive to the depletion of water in said reservoir below a first low level for starting the flow of makeup water to said reservoir and for terminating the flow of makeup water when it exceeds a first high level, and a second mode of operation responsive to the depletion of water in said reservoir below a second low level below the first low level for deactivating the first mode of operation and for starting the flow of makeup water to said reservoir and for terminating the flow of makeup water when it exceeds a second high level which is higher than the first high level and for shifting back to the first mode of operation.
Claim 12
Dependent Claim
172 words
In a cooling tower system for an air conditioner or the like comprising a water reservoir, a heat exchanger, spray means for spraying water to said reservoir and flow means for recirculating water from said reservoir through said heat exchanger and to said spray means, the improvement comprising water makeup means including a first mode of operation responsive to the depletion of water in said reservoir below a first low level for starting the flow of makeup water to said reservoir and for terminating the flow of makeup water when it exceeds a first high level, and a second mode of operation responsive to the depletion of water in said reservoir below a second low level below the first low level for deactivating the first mode of operation and for starting the flow of makeup water to said reservoir and for terminating the flow of makeup water when it exceeds a second high level which is higher than the first high level and for shifting back to the first mode of operation.
Claim 13
Dependent Claim
28 words
The system of claim 8 and further including chemical additive means arranged to inject chemicals into the recirculating water and the flow of makeup water to said reservoir.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |