Patent US3747767A successfully refreshed from Google Patents.
US3747767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment device
Assignee: Chemie Brita Geraete Ing Karl Itter Nachfolger
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Filing: 1971-04-29
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Granted: 1973-07-24
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Expires: 1991-04-29
Abstract
Abstract A water treatment device is formed of a funnel-shaped part and an elongated tubular-shaped shell having one end fitted into the funnel-shaped part. The shell in combination with a screen-like closure at each end forms a chamber which contains a granular cleaning agent not soluble in water. The screen-like closures are formed to provide openings for the water but to prevent any passage of the granular material. The funnel-shaped part is more elastic than the shell and deforms when the shell is inserted into it so that a seal-type engagement is provided between the two. Removable covers can be provided for the opposite ends of the shell.
Inventors
- 👤 H Hankammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/28; B01J; B01J47/00; B01J47/02; B01J47/022; B01J47/024; B01J8/00; B01J8/18; C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; C02F9/00; C02F9/20; C02F2201/00; C02F2201/002; C02F2201/006; C02F2307/00; C02F2307/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
290 words
A device for water treatment, comprising a tubular shell, a screen-like closure for each of the opposite ends of said shell, said shell and closures forming a chamber arranged to contain a granular agent for treating water, said closures being formed so that the openings there-through are of a size to prevent any displacement of the granular agent from the chamber while permitting passage of water through said closures, said screenlike closures are molded integrally of a plastic material and each comprises a number of ribs in the form of concentric rings disposed in a first plane and another number of ribs in the form of concentric rings disposed in a second plane parallel to and superimposed on the first plane of said ribs so that the lower surface of said ribs in said second plane and the upper surface of said ribs in said first plane are in substantially the same plane, first radially extending ribs located in said first plane interconnecting said concentric ribs in said first plane and second radially extending ribs located in said second plane interconnecting said concentric ribs in said second plane, said concentric ribs in said first plane have a slightly different radius from the adjacent said concentric ribs in said second plane and are offset laterally relative to said concentric ribs in said second plane so that the adjacent lower edges of said concentric ribs in said second plane and the upper edges of said concentric ribs in said first plane are spaced apart for forming narrow arcuate slots having a width less than the size of the granular agent so that water can pass through the arcuate slots while the granular cleaning agent is retained within the chamber in said shell.
Claim 2
Independent Claim
290 words
A device for water treatment, comprising a tubular shell, a screen-like closure for each of the opposite ends of said shell, said shell and closures forming a chamber arranged to contain a granular agent for treating water, said closures being formed so that the openings there-through are of a size to prevent any displacement of the granular agent from the chamber while permitting passage of water through said closures, said screenlike closures are molded integrally of a plastic material and each comprises a number of ribs in the form of concentric rings disposed in a first plane and another number of ribs in the form of concentric rings disposed in a second plane parallel to and superimposed on the first plane of said ribs so that the lower surface of said ribs in said second plane and the upper surface of said ribs in said first plane are in substantially the same plane, first radially extending ribs located in said first plane interconnecting said concentric ribs in said first plane and second radially extending ribs located in said second plane interconnecting said concentric ribs in said second plane, said concentric ribs in said first plane have a slightly different radius from the adjacent said concentric ribs in said second plane and are offset laterally relative to said concentric ribs in said second plane so that the adjacent lower edges of said concentric ribs in said second plane and the upper edges of said concentric ribs in said first plane are spaced apart for forming narrow arcuate slots having a width less than the size of the granular agent so that water can pass through the arcuate slots while the granular cleaning agent is retained within the chamber in said shell.
Claim 3
Dependent Claim
48 words
A device, as set forth in claim 1, characterized in that said screen-like closure on one end of said shell being removably secured within said shell, and the other said screen-like closure at the opposite end of said shell being formed as an integral part of said shell.
Claim 4
Dependent Claim
30 words
A device, as set forth in claim 2, characterized in that a handle is formed on the removable said screen-like closure for assisting in removing said closure from said shell.
Claim 5
Dependent Claim
102 words
A device, as set forth in claim 3, characterized in that said screen-like closure within the one end of said shell is inset into said shell, a pair of identically shaped covers haVing an annular shaped clamping rim extending therefrom being arranged to form covers for the opposite ends of said shell, said covers being dimensioned so that one of them can be inserted with its rim extending within said shell into the one end thereof while the other said cover is fitted over the opposite end of said shell so that its rim fits about the outer surface of said shell.
Claim 6
Dependent Claim
27 words
A device, as set forth in claim 4, characterized in that the walls of said shell tapering inwardly from the one end thereof to the other end.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |