US4885089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid distributor cap for a filter cartridge
Assignee: Brita SE
•
Filing: 1987-08-19
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Granted: 1989-12-05
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Expires: 2007-08-19
Abstract
Abstract The invention relates to a filter cartridge for a liquid filter, in particular for use for tanks for the filtration of water for the production of drinking water, with a generally cylindrical vessel, which contains the filtering material and with a sealing screen mounted on this vessel like a cover. In order to improve the functioning of a filter cartridge, and in particular to make such a filter cartridge, which with comparatively fast liquid throughput has a good filtration action with optimum utilization of the filtering material, it is proposed in conformity with the invention that the sealing screen be covered by a distributor cap 3 essentially closed at the top and open at the side.
Inventors
- 👤 Heinz Hankammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:47
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/001; B01D29/00; B01D29/88; B01D29/90; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2224
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
151 words
A liquid distributor for a generally cylindrical filter cartridge (1) used to filter water for drinking purposes, the cartridge having a latitudinal axis and containing a quantity of filter material and also having an entrance screen (2) at one end thereof through which water enters the cartridge; the distributor comprising an essentially closed distributor cap (3) adapted for mounting over one end of the cartridge around the axis and covering the screen; said cap having a bottom section (15) including flow directing upper and lower surfaces which are symmetrical about the axis and are constructed and arranged to direct flow of liquid along said upper surfaces to the sides of the cartridge and between the screen and said lower surface so as to enter the filter cartridge through a space between the screen and lower surface of said cap; and means defining a venting duct (11) extending through said bottom section.
Claim 2
Dependent Claim
151 words
A liquid distributor for a generally cylindrical filter cartridge (1) used to filter water for drinking purposes, the cartridge having a latitudinal axis and containing a quantity of filter material and also having an entrance screen (2) at one end thereof through which water enters the cartridge; the distributor comprising an essentially closed distributor cap (3) adapted for mounting over one end of the cartridge around the axis and covering the screen; said cap having a bottom section (15) including flow directing upper and lower surfaces which are symmetrical about the axis and are constructed and arranged to direct flow of liquid along said upper surfaces to the sides of the cartridge and between the screen and said lower surface so as to enter the filter cartridge through a space between the screen and lower surface of said cap; and means defining a venting duct (11) extending through said bottom section.
Claim 3
Dependent Claim
40 words
A liquid distributor as defined in claim 1, wherein said distributor cap includes on the underside of said bottom section a plurality of vanes in the form of plates (4) extending away from said cap and parallel to said axis.
Claim 4
Dependent Claim
23 words
A liquid distributor as defined in claim 2, wherein said plates are shaped to extend both radially and circumferentially of said distributor cap.
Claim 5
Dependent Claim
65 words
A liquid distributor as defined in claim 1, wherein a hollow vent cone (10) is fitted to the screen and said distributor cap is of conical shape and includes a central hollow cone (9) arranged to fit on the vent cone and point away from the filter cartridge, said hollow cone having a length which corresponds to at least the radius of the filter cartridge.
Claim 6
Dependent Claim
134 words
A liquid distributor for a filter cartridge (1) used in filtering water caused to flow through a generally cylindrical filter cartridge, the cartridge having at one end thereof a generally conical screen (2) with a centrally located vent cone (10) thereon; said distributor comprising an essentially closed circular distributor cap removably mounted on the screen in spaced concentric relation thereto, said cap having a flow directing bottom section (15) which is at least as large in diameter as the screen and is constructed and arranged to direct flow of liquid to the sides of the cartridge so as to enter the screen by flowing over the top of and then beneath said cap; and said distributor cap having means defining a venting duct (11) adapted for alignment with the vent cone(10) in the screen.
Claim 7
Dependent Claim
134 words
A liquid distributor for a filter cartridge (1) used in filtering water caused to flow through a generally cylindrical filter cartridge, the cartridge having at one end thereof a generally conical screen (2) with a centrally located vent cone (10) thereon; said distributor comprising an essentially closed circular distributor cap removably mounted on the screen in spaced concentric relation thereto, said cap having a flow directing bottom section (15) which is at least as large in diameter as the screen and is constructed and arranged to direct flow of liquid to the sides of the cartridge so as to enter the screen by flowing over the top of and then beneath said cap; and said distributor cap having means defining a venting duct (11) adapted for alignment with the vent cone(10) in the screen.
Claim 8
Dependent Claim
39 words
A liquid distributor as defined in claim 5, wherein said distributor cap includes on the underside of said flow directing surface a plurality of vanes in the form of plates (4) extending parallel to the axis of said cap.
Claim 9
Dependent Claim
23 words
A liquid distributor as defined in claim 6, wherein said plates are shaped to extend both radially and circumferentially of said distributor cap.
Claim 10
Dependent Claim
28 words
A liquid distributor according to claim 5, said distributor cap having on its underside at least one alignment pin arranged to cooperate with an aperture in the screen.
Claim 11
Dependent Claim
43 words
A liquid distributor claim 5, wherein said distributor cap is of conical shape and includes a central hollow cone arranged to point away from the filter cartridge, said cone having a length which corresponds to at least the radius of the filter cartridge.
Claim 12
Dependent Claim
22 words
The combination of claim 5, wherein said venting duct is formed in interfitting hollow cones extending from said cap and said screen.
Claim 13
Dependent Claim
104 words
A filter arrangement particularly adapted for the filtering of drinking water, comprising a generally cylindrical filter cartridge (1), a generally conical screen (2) fitted to one end of said filter cartridge and having a plurality of generally radially extending ribs (5) dividing said screen into sectors, and an essentially closed generally conical cap (3) removably mounted on said screen is spaced relation thereto on the opposite side from said filter cartridge, said cap having a smooth flow directing surface extending outward from its center so as to cause water to enter the sectors of said screen by flowing over and then beneath said cap.
Claim 14
Dependent Claim
104 words
A filter arrangement particularly adapted for the filtering of drinking water, comprising a generally cylindrical filter cartridge (1), a generally conical screen (2) fitted to one end of said filter cartridge and having a plurality of generally radially extending ribs (5) dividing said screen into sectors, and an essentially closed generally conical cap (3) removably mounted on said screen is spaced relation thereto on the opposite side from said filter cartridge, said cap having a smooth flow directing surface extending outward from its center so as to cause water to enter the sectors of said screen by flowing over and then beneath said cap.
Claim 15
Dependent Claim
34 words
A filter arrangement as defined in claim 11, wherein said cap includes on the underside of said flow directing surface a plurality of vanes in the form of plates (4) extending to said screen.
Claim 16
Dependent Claim
22 words
A filter arrangement as defined in claim 12, wherein said plates are shaped to extend both radially and circumferentially of said cap.
Claim 17
Dependent Claim
36 words
Apparatus as defined in claim 12, including means defining apertures (8) formed in said ribs, and pins (7) extending from said vanes and adapted to fit into said apertures to mount said cap on said screen.
Claim 18
Dependent Claim
48 words
Apparatus according to claim 11, said ribs of said screen having the shape of radially aligned plates which extend over the majority of an end of the filter cartridge and enter the cartridge up to a depth which at a maximum corresponds to the radius of the cartridge.
Claim 19
Dependent Claim
49 words
An assembly as defined in claim 11, wherein said cap is of conical shape and includes a central hollow cone (9) arranged to point away from the filter cartridge, and a hollow vent cone (10) formed on said screen and adapted to fit into said cone on said cap.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |