US4306971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purifying apparatus
Assignee: Brita SE
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Filing: 1980-05-16
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Granted: 1981-12-22
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Expires: 2000-05-16
Abstract
Abstract An apparatus for purifying water, comprising a funnel-shaped member, a sleeve formed integrally with said member, a cup-shaped insert having a cylindrical wall arranged within the sleeve, screen-like closure members at upper and lower ends of the cylindrical wall of the insert, defining an accommodation chamber containing a granular purifying agent which is insoluble in water, the apertures in the screen-like closure members being smaller than the granules of the purifying agent, and a ventilation tube projecting upward and extending above the vertical height of the funnel-shaped member, provided at the top with openings, attached to the screen-like closure member at the upper end of the insert, said ventilation tube serving as a handle for said insert.
Inventors
- 👤 Heinz Hankammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; B; B01; B01D; B01D29/00; B01D29/085; B01D35/00; B01D35/28; B01D36/00; B01D36/001; C02F2307/00; C02F2307/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
An apparatus for purifying water, said apparatus comprising a funnel-shaped member, a sleeve formed integrally with said member, a cup-shaped insert having a cylindrical wall arranged within the sleeve, screen-like closure members at upper and lower ends of the cylindrical wall of the insert, defining an accommodation chamber containing a granular purifying agent which is insoluble in water, the apertures in the screen-like closure members being smaller than the granules of the purifying agent, and a ventilation tube projecting upward and extending above the vertical height of the funnel-shaped member, provided at the top with openings, attached to the screen-like closure member at the upper end of the insert said ventilation tube serving as a handle for said insert.
Claim 2
Independent Claim
119 words
An apparatus for purifying water, said apparatus comprising a funnel-shaped member, a sleeve formed integrally with said member, a cup-shaped insert having a cylindrical wall arranged within the sleeve, screen-like closure members at upper and lower ends of the cylindrical wall of the insert, defining an accommodation chamber containing a granular purifying agent which is insoluble in water, the apertures in the screen-like closure members being smaller than the granules of the purifying agent, and a ventilation tube projecting upward and extending above the vertical height of the funnel-shaped member, provided at the top with openings, attached to the screen-like closure member at the upper end of the insert said ventilation tube serving as a handle for said insert.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein the funnel-shaped member has projections at its upper edge.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 1, wherein the insert has a sealing device running around its periphery.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1 wherein a stop is formed integrally with the lower end of the sleeve.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 1 wherein the sleeve is expanded at its upper end to form a support.
Claim 7
Dependent Claim
32 words
An apparatus according to claim 1 wherein the insert is in the form of a cup, the outer cup walls thereof being arranged approximately coaxially with the inner wall of the sleeve.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1 wherein said lower screen-like closure member of said cup-shaped insert is formed integrally with said cup wall.
Claim 9
Dependent Claim
26 words
An apparatus according to claim 1 wherein said lower screen-like closure member of the cup-shaped insert is fastened to the walls thereof by means of clamps.
Claim 10
Dependent Claim
16 words
An apparatus according to claim 1 wherein the funnel-shaped member has recesses at its upper edge.
Claim 11
Independent Claim
179 words
An apparatus for purifying water, said apparatus comprising: (a) a funnel-shaped member; (b) a sleeve integrally formed with said funnel-shaped member; (c) an annular bead on the inner wall of said sleeve positioned near said funnel-shaped member; (d) a cylindrical member slidably insertable into said sleeve, said cylindrical member further comprising: (i) a cylindrical accommodation chamber containing a granular purifying agent which is insoluble in water; (ii) screen-like closure members, at upper and lower ends of said accommodation chamber, the apertures therein being smaller than the granules of the purifying agent, whereby said granular purifying agent is held in said accommodation chamber; (iii) a ventilation tube projecting upward and extending above the vertical height of the funnel-shaped member, provided at the top with openings, attached to said screen-like closure member at the upper end of said accommodation chamber, said ventilation tube serving as a handle for said cylindrical member; (iv) an annular sealing groove at the upper end of the outer wall of said accommodation chamber whereby said cylindrical member is secured to said sleeve at said annular bead.
Claim 12
Independent Claim
179 words
An apparatus for purifying water, said apparatus comprising: (a) a funnel-shaped member; (b) a sleeve integrally formed with said funnel-shaped member; (c) an annular bead on the inner wall of said sleeve positioned near said funnel-shaped member; (d) a cylindrical member slidably insertable into said sleeve, said cylindrical member further comprising: (i) a cylindrical accommodation chamber containing a granular purifying agent which is insoluble in water; (ii) screen-like closure members, at upper and lower ends of said accommodation chamber, the apertures therein being smaller than the granules of the purifying agent, whereby said granular purifying agent is held in said accommodation chamber; (iii) a ventilation tube projecting upward and extending above the vertical height of the funnel-shaped member, provided at the top with openings, attached to said screen-like closure member at the upper end of said accommodation chamber, said ventilation tube serving as a handle for said cylindrical member; (iv) an annular sealing groove at the upper end of the outer wall of said accommodation chamber whereby said cylindrical member is secured to said sleeve at said annular bead.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |