US3675775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water conditioner
Assignee: Individual
•
Filing: 1969-12-05
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Granted: 1972-07-11
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Expires: 1989-12-05
Abstract
Abstract The filtration plant consists of a series of filter units, each comprising a filter bowl containing a tubular filter element. The filter bowl is connected to a water inlet header while the interior of the filter element is connected to a clean water outlet header by way of valve connections. The filter bowl is also valve connected to a drain to permit backwashing. A perforated tube mounted in the center of the filter element which serves to collect clean water during filtering and to provide an even distribution of backwash water on the filter element during backwashing.
Inventors
- 👤 Louis Obidniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D2201/00; B01D2201/04; B01D2201/0469; B01D2201/0484
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
216 words
A filtration plant comprising a plurality of modular interchangeable filter units connected in parallel across a raw water header and a filtered water header, each filter unit comprising: a filter bowl having a tubular filter element therein, a manifold connected to the filter bowl and filter element, said manifold provided with an inner central opening connected to the inside of the tubular element and an annular opening connected to the outer portion of the bowl outside of the tubular element, a first fluid line having a valve therein and connecting the outer annular manifold opening, and hence the said outer portion of the bowl outside of the tubular element to the raw water header for receiving raw water to be filtered, a second fluid line with a second fluid valve therein connecting the said outer portion of the bowl via the first line to a drain for backwashing the filter element and a third fluid line with a third valve therein connecting the central opening of the manifold, and hence the inside of the tubular element to the filtered water header, each filter unit constructed and arranged so that filtered water entering the interior of the filter element during filtration is collected and during backwashing water is uniformly distributed against the interior of the filter element.
Claim 2
Dependent Claim
216 words
A filtration plant comprising a plurality of modular interchangeable filter units connected in parallel across a raw water header and a filtered water header, each filter unit comprising: a filter bowl having a tubular filter element therein, a manifold connected to the filter bowl and filter element, said manifold provided with an inner central opening connected to the inside of the tubular element and an annular opening connected to the outer portion of the bowl outside of the tubular element, a first fluid line having a valve therein and connecting the outer annular manifold opening, and hence the said outer portion of the bowl outside of the tubular element to the raw water header for receiving raw water to be filtered, a second fluid line with a second fluid valve therein connecting the said outer portion of the bowl via the first line to a drain for backwashing the filter element and a third fluid line with a third valve therein connecting the central opening of the manifold, and hence the inside of the tubular element to the filtered water header, each filter unit constructed and arranged so that filtered water entering the interior of the filter element during filtration is collected and during backwashing water is uniformly distributed against the interior of the filter element.
Claim 3
Dependent Claim
74 words
A filtration plant according to claim 1 wherein each said manifold has an outer annular neck with an external thread to receive said filter bowl, an inner annular neck with an inner thread to receive said filter element, said annular opening being located between the annular necks connected to the raw water header and drain and said inner central opening being an axial opening within the inner neck connected to the filtered water header.
Claim 4
Dependent Claim
29 words
A filtration plant according to claim 2 wherein each filter element rests on the said inner neck and is firmly held in place by means of a lock nut.
Claim 5
Dependent Claim
19 words
A filtration plant, according to claim 1 in in said valves are adapted for remote semi-automatic or automatic control.
Claim 6
Dependent Claim
65 words
A multiple filtration plant as set forth in claim 1 including a series of interconnected units each of which has a multiple of individual filter units, the said interconnected units being provided with inlet, outlet and backwash valves, and the said individual filter units being provided with inlet, outlet and backwash valves, all of the said valves being adopted for remote semi-automatic or automatic control.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |