US4902411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drinking water purifier
Assignee: Individual
•
Filing: 1988-10-24
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Granted: 1990-02-20
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Expires: 2008-10-24
Abstract
Abstract A water purifier to purify drinkable water, comprising a packed filter chamber, jet type oxygen dissolution chamber, UV lamp sterilization chamber, water circulation and drainage structure, water supply structure and a control circuit. Such an arrangement removes high polymer hydrocarbon pollutants, low polymer trihalo-methane pollutants, and other soluble or insoluble pollutants such as mineral substances, metal salts or other impurities in the water.
Inventors
- 👤 Frank W. G. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; C02F1/20; C02F1/30; C02F1/32; C02F1/325; C02F9/00; C02F9/20; C02F2307/00; C02F2307/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
A water purifier system comprising: an upstanding water tank; a water filtration unit located alongside said water tank; an air-water contact means located directly above said water tank; an ultraviolet lamp means located within said tank; means for circulating water from the tank through the filtration unit, air-water contact means, and back into the tank; said circulating means comprising a motor-operated pump, and a conduit extending from the filtration unit to the air-water contact means; means for introducing make-up water to the purifier system, comprising a solenoid valve; means for withdrawing purified water from the system comprising a diverter valve located in said conduit; and control means for continuously operating the motor-operated pump except when the solenoid valve is opened to introduce make-up water into the system.
Claim 2
Dependent Claim
127 words
A water purifier system comprising: an upstanding water tank; a water filtration unit located alongside said water tank; an air-water contact means located directly above said water tank; an ultraviolet lamp means located within said tank; means for circulating water from the tank through the filtration unit, air-water contact means, and back into the tank; said circulating means comprising a motor-operated pump, and a conduit extending from the filtration unit to the air-water contact means; means for introducing make-up water to the purifier system, comprising a solenoid valve; means for withdrawing purified water from the system comprising a diverter valve located in said conduit; and control means for continuously operating the motor-operated pump except when the solenoid valve is opened to introduce make-up water into the system.
Claim 3
Dependent Claim
34 words
The water purifier system of claim 1 wherein said air-water contact means comprises a semi-spherical dome extending upwardly from said tank, and an upwardly-directed water jet means located centrally below the dome interior surface.
Claim 4
Dependent Claim
46 words
The water purifier system of claim 2 wherein said ultraviolet lamp means comprises a lamp extending vertically downwardly into the tank at a point slightly offset from said dome, and baffle means located below the dome to direct aerated water into proximity to the ultraviolet lamp.
Claim 5
Dependent Claim
46 words
The water purifier system of claim 1 wherein said water filtration unit comprises a vertical column having an upper inlet chamber, a lower outlet chamber, packing between the two chambers, and a discharge pipe extending upwardly from the outlet chamber through the packing and inlet chamber.
Claim 6
Dependent Claim
24 words
The water purifier system of claim 4 wherein said motor-operated pump is located above the filtration unit in fluid communication with said discharge pipe.
Claim 7
Dependent Claim
43 words
The water purifier system of claim 1 wherein said means for introducing make-up water is connected to a point in the system immediately upstream from the filtration unit, so that make-up water is filtered without being diluted by water already in the system.
Claim 8
Dependent Claim
36 words
The water purifier system of claim 1 wherein said control means comprises a liquid level sensor responsive to liquid levels in said tank, and an electronic control circuit interconnecting said sensor, motor-operated pump and solenoid valve.
Claim 9
Dependent Claim
54 words
The water purifier system of claim 7, wherein said motor-operated pump includes a motor having a high speed mode and a low speed mode; said control means including means interconnecting the motor and ultraviolet lamp means so that the ultraviolet lamp means is energized only when the motor is in its low speed mode.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |