US4849100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable water purifier
Assignee: DE PUE STEPHEN E
•
Filing: 1986-03-07
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Granted: 1989-07-18
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Expires: 2006-03-07
Abstract
Abstract A water purification system to provide uncontaminated, odorless water from a contaminated source implementing an ultraviolet chamber and sensor to ensure effective bacterial kill. A sensor shuts off water to user if ultraviolet light intensity falls below a safe minimum. A decalcification unit is provided to assure proper operation of the UV sensor.
Inventors
- 👤 Rocco A. Papandrea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:42
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/30; C02F1/32; C02F1/325; C02F9/00; C02F9/20; C02F2201/00; C02F2201/32; C02F2201/326
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A water purifier including particulate filtration elements in flow communication with an ultraviolet (UV) power source whereby water flowing into said unit passes through said particulate filters and said UV power source for purification purposes, the improvement wherein a UV power sensor is placed in flow communication with said UV power source for the purpose of sensing the intensity of said UV power within said source, and a decalcification unit in flow communication with said UV power source and constituting means for reducing calcification of said sensor when exposed to said water within said UV power source.
Claim 2
Dependent Claim
97 words
A water purifier including particulate filtration elements in flow communication with an ultraviolet (UV) power source whereby water flowing into said unit passes through said particulate filters and said UV power source for purification purposes, the improvement wherein a UV power sensor is placed in flow communication with said UV power source for the purpose of sensing the intensity of said UV power within said source, and a decalcification unit in flow communication with said UV power source and constituting means for reducing calcification of said sensor when exposed to said water within said UV power source.
Claim 3
Dependent Claim
56 words
The water purifier of claim 1 and timer means for permitting said UV power source to reach its maximum desired power level thereafter exposing water previously within said UV power source for sufficient period of time to purify said water, valve means for permitting fluid flow of said water through said unit after said time delay.
Claim 4
Dependent Claim
43 words
The water purification of claim 2 and a receptacle for housing said filtration element, UV power source and decalcification unit to permit operation of said unit with water flow therethrough with said receptacle enclosing said filtration element, UV power source, and decalcification unit.
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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |