Patent US3763878A successfully refreshed from Google Patents.
US3763878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorinating apparatus for swimming pools
Assignee: Carefree International Inc
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Filing: 1971-08-24
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Granted: 1973-10-09
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Expires: 1991-08-24
Abstract
Abstract Chlorine gas is controllably introduced into the water of a swimming pool by circulation of the water through an ejector to which the gas is fed. A clock-controlled circuit is operative simultaneously with a motor driven pump circulating the water, to control opening and closing of valves through which the water and gas is conducted to the ejector in accordance with a selected operational mode.
Inventors
- 👤 D Harden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763; C02F2103/00; C02F2103/42; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/8593; Y10T137/86389; Y10T137/86397; Y10T137/86405; Y10T137/86421
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
In combination with a source of gas and an ejector through which liquid is circulated from a reservoir, a system for treating the liquid comprising a source of electrical energy, motor driven pump means energized by said source of electrical energy and connected to the ejector for inducing circulating flow of the liquid from the reservoir through the ejector, power operated valve means rendered operative by said source of electrical energy for conducting flow of the liquid and the gas to the ejector, means responsive to flow of liquid through the ejector for selectively connecting the source of gas to the valve means, and gas feed control means connected to the valve means for selecting the intervals during which flOw is conducted through the valve means, said gas feed control means comprising timing means connecting the source of electrical energy to the power operated valve means for opening thereof during the selected intervals and mode control means for alternatively opening and closing the valve means in cycles or maintaining the valve means continuously open during the selected intervals.
Claim 2
Dependent Claim
178 words
In combination with a source of gas and an ejector through which liquid is circulated from a reservoir, a system for treating the liquid comprising a source of electrical energy, motor driven pump means energized by said source of electrical energy and connected to the ejector for inducing circulating flow of the liquid from the reservoir through the ejector, power operated valve means rendered operative by said source of electrical energy for conducting flow of the liquid and the gas to the ejector, means responsive to flow of liquid through the ejector for selectively connecting the source of gas to the valve means, and gas feed control means connected to the valve means for selecting the intervals during which flOw is conducted through the valve means, said gas feed control means comprising timing means connecting the source of electrical energy to the power operated valve means for opening thereof during the selected intervals and mode control means for alternatively opening and closing the valve means in cycles or maintaining the valve means continuously open during the selected intervals.
Claim 3
Dependent Claim
23 words
The combination of claim 1 including interlock means for closing the valve means in response to failure of the source of electrical energy.
Claim 4
Dependent Claim
32 words
The combination of claim 2 wherein said mode control means includes a repeat cycle timer and a continuous feed switch connected in parallel between the source of energy and the valve means.
Claim 5
Dependent Claim
15 words
The combination of claim 3 wherein said gas is chlorine and the liquid is water.
Claim 6
Dependent Claim
32 words
The combination of claim 1 wherein said mode control means includes a repeat cycle timer and a continuous feed switch connected in parallel between the source of energy and the valve means.
Claim 7
Dependent Claim
132 words
In combination with a source of gas and an ejector through which liquid is circulated from a reservoir, a system for treating the liquid comprising motor driven pump means connected to the ejector for inducing circulating flow of the liquid from the reservoir through the ejector, power operated valve means rendered operative for conducting flow of the liquid and the gas to the ejector means responsive to flow of liquid through the ejector for selectively connecting the source of gas to the valve means, and gas feed control means connected to the valve means for selecting the intervals during which flow is conducted through the valve means, and mode control means for alternatively opening and closing the valve means in cycles or maintaining the valve means continuously open during the selected intervals.
Claim 8
Dependent Claim
132 words
In combination with a source of gas and an ejector through which liquid is circulated from a reservoir, a system for treating the liquid comprising motor driven pump means connected to the ejector for inducing circulating flow of the liquid from the reservoir through the ejector, power operated valve means rendered operative for conducting flow of the liquid and the gas to the ejector means responsive to flow of liquid through the ejector for selectively connecting the source of gas to the valve means, and gas feed control means connected to the valve means for selecting the intervals during which flow is conducted through the valve means, and mode control means for alternatively opening and closing the valve means in cycles or maintaining the valve means continuously open during the selected intervals.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |