Patent US3789991A successfully refreshed from Google Patents.
US3789991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water filter device
Assignee: Individual
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Filing: 1971-08-23
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Granted: 1974-02-05
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Expires: 1991-08-23
Abstract
Abstract A filter device adapted to be attached to faucets and the like for removing impurities from tap water. The device comprises two sections with a filter member between having a replaceable filter unit. The device is adapted to cause the flow of water to pass through the filter unit for filtering thereof, or if no filtering is desired, water can pass directly through the device unfiltered.
Inventors
- 👤 Z Krongos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
227 words
A filter device for filtering tap water to remove odors and impurities therefrom comprising: a. a first member and a second member adapted to be detachably connected together to form a casing for an enclosed space adapted to contain a filter unit; b. said filter unit comprising an outer peripheral wall and a central hub with a central water passageway therein, a plurality of compartments formed by radial walls extending between said peripheral wall and said hub, each of said radial walls except one containing a plurality of openings for the passage of water, a plurality of holes in said hub facing adjacent the compartment formed with said radial wall with no openings, a dense cylindrical filter element disposed in each of said compartments and a less dense filter material disposed throughout and within each of said compartments; c. said first member comprising a water inlet connector adapted to be fitted to a water source, passageways for directing water into said dense cylindrical filter elements of said filter unit, a passageway for directing water into said central passageway of said filter unit hub, and a valve member for directing water from said inlet to either said passageways to said filter unit or to said central passageway; d. said second member comprising an outlet water connector adapted to receive water from said central passageway of said filter unit.
Claim 2
Dependent Claim
227 words
A filter device for filtering tap water to remove odors and impurities therefrom comprising: a. a first member and a second member adapted to be detachably connected together to form a casing for an enclosed space adapted to contain a filter unit; b. said filter unit comprising an outer peripheral wall and a central hub with a central water passageway therein, a plurality of compartments formed by radial walls extending between said peripheral wall and said hub, each of said radial walls except one containing a plurality of openings for the passage of water, a plurality of holes in said hub facing adjacent the compartment formed with said radial wall with no openings, a dense cylindrical filter element disposed in each of said compartments and a less dense filter material disposed throughout and within each of said compartments; c. said first member comprising a water inlet connector adapted to be fitted to a water source, passageways for directing water into said dense cylindrical filter elements of said filter unit, a passageway for directing water into said central passageway of said filter unit hub, and a valve member for directing water from said inlet to either said passageways to said filter unit or to said central passageway; d. said second member comprising an outlet water connector adapted to receive water from said central passageway of said filter unit.
Claim 3
Dependent Claim
24 words
The filter device of claim 1, wherein said filter unit is retained within said casing by a spring member disposed in said second member.
Claim 4
Dependent Claim
22 words
The filter device of claim 1 wherein said first and second members are provided with screw threads for connecting the members together.
Claim 5
Dependent Claim
32 words
The filter device of claim 1 wherein said filter unit is divided into four compartments and said first member comprises four passageways each of which direct incoming water to a respective compartment.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |