US4686037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water filter apparatus
Assignee: Water Pik Inc
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Filing: 1985-03-27
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Granted: 1987-08-11
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Expires: 2005-03-27
Abstract
Abstract A water filter has an elongated base with an inlet opening near one end thereof to which is secured an adaptor ring for attachment to a water faucet. A first outlet opening on the base dispenses unfiltered water and there is a channel defined within the base that leads toward the other end, with an externally-operable valve being included for selecting between unfiltered flow to that outlet and flow down the channel. Located near the other end of the base is a mounting on which sits a water filter cartridge that communicates with the channel, and the cartridge delivers filtered water to a second outlet. A number of features include a color indicator to exhibit degree of cartridge usage, a reversible adaptor ring to accommodate different faucets and there are different aerator structures. Of particular note is the replaceable cartridge which includes a deflector for obtaining better usage of the main filtering material, an exteriorally-mounted first filter and an internally-mounted second filter.
Inventors
- 👤 Kenneth Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:56
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/04; B01D35/043; B01D35/14; B01D35/143; C; C02; C02F; C02F1/00; C02F1/001; C02F1/003; C02F1/28; C02F2201/00; C02F2201/002; C02F2201/006; C02F2209/00; C02F2209/44; C02F2209/445; C02F2307/00; C02F2307/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
180 words
A water filter cartridge which comprises: a shell that confines a filtration material; said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings and communicating in flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings and communicating the flow of water with said material at a location spaced from said third opening; a water filtration element disposed in the path of water flow in communication with said material through said fourth opening; and deflector means surrounding said filtration element for enforcing the flow of water to spread laterally through said filtration material in communication with said filtration element and thereby increasing the portion of said material through which water tends to flow.
Claim 2
Dependent Claim
180 words
A water filter cartridge which comprises: a shell that confines a filtration material; said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings and communicating in flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings and communicating the flow of water with said material at a location spaced from said third opening; a water filtration element disposed in the path of water flow in communication with said material through said fourth opening; and deflector means surrounding said filtration element for enforcing the flow of water to spread laterally through said filtration material in communication with said filtration element and thereby increasing the portion of said material through which water tends to flow.
Claim 3
Dependent Claim
26 words
cartridge as defined in claim 1 in which said element is effectively cylindrical in shape and disposed with one end thereof facing said other end wall.
Claim 4
Dependent Claim
23 words
A cartridge as defined in claim 2 in which said element is hollow with said one end open and its other end closed.
Claim 5
Dependent Claim
21 words
A cartridge as defined in claim 2 in which said deflector is formed to cover the other end of said element.
Claim 6
Dependent Claim
43 words
A cartridge as defined in claim 4 in which said deflector is cap shaped with its open end near said other end wall and which defines a water flow passageway around said open end and alongside the exterior side wall of said element.
Claim 7
Dependent Claim
35 words
A cartridge as defined in claim 1 in which said one end wall includes as said third opening a distribution of a plurality of circumferentially-spaced apertures for enabling communication of water with said filtration material.
Claim 8
Dependent Claim
30 words
A cartridge as defined in claim 1 in which another water filtration element is disposed on the exterior of said one end wall in covering relationship to said third opening.
Claim 9
Dependent Claim
31 words
A water filter cartridge as defined in claim 1 in which a porous layer is disposed on the interior of said one end wall in covering relationship to said third opening.
Claim 10
Dependent Claim
141 words
A water filter cartridge comprising: a filtration material; a shell which confines said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings for communicating the flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings for communicating the flow of water with said material at a location spaced from said third openings; and a first water filtration element disposed on the exterior of said one end wall in covering relationship to said third opening.
Claim 11
Dependent Claim
141 words
A water filter cartridge comprising: a filtration material; a shell which confines said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings for communicating the flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings for communicating the flow of water with said material at a location spaced from said third openings; and a first water filtration element disposed on the exterior of said one end wall in covering relationship to said third opening.
Claim 12
Dependent Claim
34 words
A water filter cartridge as defined in claim 9 which further includes: and a second water filtration element disposed in the path of water flow in communication with said material through said fourth opening.
Claim 13
Dependent Claim
76 words
A water filter cartridge as defined in claim 9 in which said first element is a porous medium that exhibits a given color upon the beginning of usage but which changes color with continued usage in response to its entrapment of matter in said water, and in which a reference color is exhibited upon on the exterior of said one end wall in a position to enable a user to compare said given and reference colors.
Claim 14
Dependent Claim
24 words
A water filter cartridge as defined in claim 9 in which said first element has a pore size of approximately one-thousandth of an inch.
Claim 15
Dependent Claim
38 words
A water filter cartridge as defined in claim 9 in which said one end wall includes as said third opening a plurality of circumferentially-spaced apertures for enabling communication of water between said first element and said filtration material.
Claim 16
Dependent Claim
31 words
A water filter cartridge as defined in claim 9 in which a porous layer is disposed on the interior of said one end wall in covering relationship to said third opening.
Claim 17
Dependent Claim
166 words
A water filter cartridge comprising: a filtration material; a shell which confines said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings for communicating the flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings for communicating the flow of water with said material at a location spaced from said third opening; and a water filtration element disposed in the path of water flow in communication with said material, said element having an effectively cylindrically-shaped wall and being disposed with one end thereof facing said fourth opening to enable water flow through said cylindrically-shaped wall and said one end.
Claim 18
Dependent Claim
166 words
A water filter cartridge comprising: a filtration material; a shell which confines said filtration material through which water flows, said shell having opposite first and second end walls; a conduit disposed through said material from a first opening in one of said end walls to a second opening in the other of said end walls; a third opening in one of said end walls spaced from one of said first and second openings for communicating the flow of water with said material; a fourth opening in the other of said end walls spaced from the other of said first and second openings for communicating the flow of water with said material at a location spaced from said third opening; and a water filtration element disposed in the path of water flow in communication with said material, said element having an effectively cylindrically-shaped wall and being disposed with one end thereof facing said fourth opening to enable water flow through said cylindrically-shaped wall and said one end.
Claim 19
Dependent Claim
24 words
A water filter cartridge as defined in claim 15 in which said element has a pore size of approximately five thousandths of an inch.
Claim 20
Dependent Claim
35 words
A water filter cartridge as defined in claim 15 which further includes a deflector means surrounding said filtration element for enforcing the flow of water through said filtration material to laterally communicate with said element.
Claim 21
Dependent Claim
32 words
A water filter cartridge as defined in claim 17 which includes as said third opening a distribution of a plurality of circumferentially-spaced apertures for enabling communication of water with said filtration material.
Claim 22
Dependent Claim
23 words
A wter filter cartridge as defined in claim 17 in which said deflector is formed to cover the other end of said element.
Claim 23
Dependent Claim
44 words
A water filter cartridge as defined in claim 19 in which said deflector is cap shaped with its open end near said fourth opening and which defines a water flow passageway around said open end and alongside the exterior side wall of said element.
Claim 24
Dependent Claim
29 words
A water filter cartridge as defined in claim 15 in which a porous layer is disposed on the interior of said shell in covering relationship to said third opening.
Claim 25
Dependent Claim
36 words
A water filter cartridge as defined in claim 15 in which said element is hollow and is closed at one end thereof to facilitate the flow of water through said one end and said cylindrically-shaped wall.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |