US4740296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Household water filter system
Assignee: Individual
•
Filing: 1986-11-28
•
Granted: 1988-04-26
•
Expires: 2006-11-28
Abstract
Abstract A portable water filter for household use is disclosed, comprising a pair of releasably connected, upper and lower sections. A water faucet is connected by a line having a severe flow restriction to the lower section for discharge into the bottom thereof. The two sections are connected by a threaded collar having an integral wall separating the two sections with aperture means at its center for upward flow of water from the lower to the upper section. Each section contains two filtering materials, one of which in each section is a plurality of nested, cup-shaped, paper filter elements sealed by a mating ring to the interior surface of the respective section. The walls of the sections are transparent to permit viewing of the filter materials, thereby visually indicating the need for filter replacement by the degree of discoloration thereof.
Inventors
- 👤 Michael H. Roman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:36
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/001; C02F1/003; C02F2201/00; C02F2201/002; C02F2201/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
198 words
A water filter system for attachment to a faucet from which water is supplied at a first pressure, said filter system comprising: (a) at least two interconnected, enclosed sections arranged vertically to provide upper and lower sections; (b) a line arranged to receive water from said faucet and to discharge through an end portion arranged within said lower section near the bottom thereof; (c) flow restricting means arranged between said faucet and said end portion of said line to reduce the water pressure from said first pressure at said faucet to a second pressure when discharged into said lower section; (d) first and second filter materials arranged within said lower and upper sections, respectively, for removing or reducing particulate matter or other foreign substances or contaminants from water flowing therethrough, each of said first and second filter materials comprising a plurality of nested, cup-shaped, paper filter elements; (e) an impermeable wall separating said lower and upper sections; (f) aperture means through which water may flow from said lower to said upper section; and (g) means adjacent the top of said upper section through which water exits said filter system after passing through said first and second filter means.
Claim 2
Dependent Claim
198 words
A water filter system for attachment to a faucet from which water is supplied at a first pressure, said filter system comprising: (a) at least two interconnected, enclosed sections arranged vertically to provide upper and lower sections; (b) a line arranged to receive water from said faucet and to discharge through an end portion arranged within said lower section near the bottom thereof; (c) flow restricting means arranged between said faucet and said end portion of said line to reduce the water pressure from said first pressure at said faucet to a second pressure when discharged into said lower section; (d) first and second filter materials arranged within said lower and upper sections, respectively, for removing or reducing particulate matter or other foreign substances or contaminants from water flowing therethrough, each of said first and second filter materials comprising a plurality of nested, cup-shaped, paper filter elements; (e) an impermeable wall separating said lower and upper sections; (f) aperture means through which water may flow from said lower to said upper section; and (g) means adjacent the top of said upper section through which water exits said filter system after passing through said first and second filter means.
Claim 3
Dependent Claim
20 words
The invention according to claim 1 wherein said lower and upper sections are cylindrical in shape and of equal diameter.
Claim 4
Dependent Claim
24 words
The invention according to claim 2 wherein said lower and upper sections are interconnected by a threaded collar encircling adjacent portions of said sections.
Claim 5
Dependent Claim
16 words
The invention according to claim 3 wherein said impermeable wall is formed integrally with said collar.
Claim 6
Dependent Claim
17 words
The invention according to claim 4 wherein said aperture means are substantially centrally disposed in said wall.
Claim 7
Dependent Claim
43 words
The invention according to claim 1 and further including means for sealing said filter elements about the periphery thereof to the interior surfaces of said upper and lower sections to insure that all water flowing through said sections passes through said filter elements.
Claim 8
Dependent Claim
48 words
The invention according to claim 6 wherein said sealing means comprise a pair of rings, one disposed within each of said sections, and dimensioned to fit within said sections with the peripheries of said filter elements tightly engaged between said rings and the interior surfaces of said sections.
Claim 9
Dependent Claim
29 words
The invention according to claim 7 wherein each of said first and second filter materials include a filter material in addition to and distinct from said paper filter elements.
Claim 10
Dependent Claim
38 words
The invention according to claim 1 wherein said line comprises a length of flexible tubing connected at one end to receive water from said faucet, and said flow restricting means comprises an orifice positioned adjacent said one end.
Claim 11
Dependent Claim
45 words
The invention according to claim 1 wherein said upper and lower sections are of transparent material to permit direct viewing of said white-like filter material, thereby providing a visual indication of the need for replacement of said filter material by the degree of discoloration thereof.
References Cited (Backward Citations)
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |