US5064534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for the purification of tap water
Assignee: Individual
•
Filing: 1987-07-17
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Granted: 1991-11-12
•
Expires: 2007-07-17
Abstract
Abstract A filter for the purification of tap water containing several layers of different filter materials. One of the layers is an adsorption filter element comprising a self-supporting sintered body of finely dispersed adsortion material, e.g., activated charcoal, a thermoplastic binder material and a finely dispersed, oligodynamic material, wherein these materials provide a fine-mesh, mechanical filter. The adsorption filter can also be used by itself for filtering purposes.
Inventors
- 👤 Erich Busch
- 👤 Michael Busch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01J; B01J47/00; B01J47/012; C02F1/28; C02F1/288; C02F1/50; C02F1/505; C02F2201/00; C02F2201/002; C02F2201/006; C02F2307/00; C02F2307/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A filter useful for the purification of tap water, having a filter housing, a plurality of layers of different filter materials disposed successively in the direction of flow for the purification of the tap water by mechanical filter action and comprising an ion-exchange material, adsorption in an adsorption material and at least one layer being formed by an adsorption filter element, wherein said adsorption filter element consists of a compressed, self-supporting, sintered body of finely dispersed adsorption material, a finely dispersed oligodynamic material and a thermoplastic binder material, wherein said binder material is polyethylene having a molecular weight in the range of 3 to 7×10 6 , in the form of particles having a nodular shape and exhibiting viscous elastic properties in a transitional temperature range during heating and being sufficiently sticky on the surface to form a bond with the particles present in the adsorption material, and said adsorption filter element being a mechanical, fine-mesh filter for said tap water.
Claim 2
Dependent Claim
161 words
A filter useful for the purification of tap water, having a filter housing, a plurality of layers of different filter materials disposed successively in the direction of flow for the purification of the tap water by mechanical filter action and comprising an ion-exchange material, adsorption in an adsorption material and at least one layer being formed by an adsorption filter element, wherein said adsorption filter element consists of a compressed, self-supporting, sintered body of finely dispersed adsorption material, a finely dispersed oligodynamic material and a thermoplastic binder material, wherein said binder material is polyethylene having a molecular weight in the range of 3 to 7×10 6 , in the form of particles having a nodular shape and exhibiting viscous elastic properties in a transitional temperature range during heating and being sufficiently sticky on the surface to form a bond with the particles present in the adsorption material, and said adsorption filter element being a mechanical, fine-mesh filter for said tap water.
Claim 3
Dependent Claim
30 words
A filter in accordance with claim 1, wherein said adsorption filter element is of a mesh size sufficient for trapping contaminating particles having a size greater than approximately 0.5 μm.
Claim 4
Dependent Claim
38 words
A filter in accordance with claim 1, wherein said adsorption filter element is fastened onto the filter housing in a pressure-proof and sealing manner by means of a sealing cement extending over the surface of said filter housing.
Claim 5
Dependent Claim
18 words
A filter in accordance with claim 3 wherein said ion-exchange material is downstream from the adsorption filter element.
Claim 6
Dependent Claim
17 words
A filter in accordance with claim 4 wherein said ion-exchange material consists of a hydrogen ion-exchange material.
Claim 7
Dependent Claim
23 words
A filter in accordance with claim 5 further comprising a bacteria arresting means disposed between said adsorption filter element and said ion-exchange material.
Claim 8
Dependent Claim
16 words
A filter in accordance with claim 6 wherein said bacteria arresting means contains a bacteria filter.
Claim 9
Dependent Claim
27 words
A filter in accordance with claim 7 wherein said bacteria filter is a fine-mesh block of pressed coal having an oligodynamic material dispersed in said pressed coal.
Claim 10
Dependent Claim
22 words
A filter in accordance with claim 8 wherein said bacteria arresting means further comprises oligodynamic layer disposed upstream of said bacteria filter.
Claim 11
Dependent Claim
26 words
A filter in accordance with claim 9 further comprising a post-adsorption means disposed at the end of the flow path of said water through said filter.
Claim 12
Dependent Claim
16 words
A filter in accordance with claim 10 wherein said post-adsorption means has a post-adsorption filter layer.
Claim 13
Dependent Claim
19 words
A filter in accordance with claim 11 wherein said post-adsorption filter layer is a poured layer of activated charcoal.
Claim 14
Dependent Claim
28 words
A filter in accordance with claim 11 wherein said post-adsorption means has a disc of pressed coal disposed at the end of the flow path of said water.
Claim 15
Dependent Claim
16 words
A filter in accordance with claim 13 wherein said pressed coal layer contains an oligodynamic material.
Claim 16
Dependent Claim
14 words
A filter in accordance with claim 14 wherein said oligodynamic material is silver powder.
Claim 17
Dependent Claim
41 words
A filter in accordance with claim 1 wherein said adsorption filter element is subdivided into several individual bodies wherein the length of each body in the direction of flow is less than the total length of said entire adsorption filter element.
References Cited (Backward Citations)
US3327859A
Cited
US4664683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |