US3771655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration system
Assignee: Individual
•
Filing: 1971-12-16
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Granted: 1973-11-13
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Expires: 1991-12-16
Abstract
Abstract A filtration system is disclosed which includes an inlet passageway having restriction means therein. The restriction means may be an orifice plate or a small sized passage, and this determines the difference in the fluid levels between a supply conduit and the filter chamber into which the influent water is delivered. The restriction means also causes changes in level due to changes in flow rate to be more gradual, thus causing filtration rates to change more slowly. The use of the restriction means in the inlet passageway further allows a changing flow rate to be supplied to the system and also provides a declining flow rate through the system as the filtration progresses.
Inventors
- 👤 H Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:09
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/002; B01D24/005; B01D24/02; B01D24/20; B01D24/24; B01D24/46; B01D24/4631
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
337 words
A filtration system comprising an inlet passageway for receiving liquid therein in influent form having suspended solids therein, the liquid being supplied at a predetermined level in said passageway; at least one first chamber means defined by an outside wall, an inside wall, and a pair of spaced side walls, each side wall being of a vertical height less than the vertical height of said outside and inside walls; an inlet conduit connecting said inlet passageway to said first chamber means via a connection in one of said walls; second chamber means comprising at least one pair of chambers disposed respectively on either side of said first chamber means, and each second chamber defined by said inside wall, said outside wall, one of said side walls and a further side wall having a greater height than the height of said one side wall, the influent liquid in said second chamber means having a level higher than said side walls and lower than said predetermined level; said second chamber means having a base comprising filter material adapted to remove the suspended solids from the liquid while allowing the liquid to pass therethrough in filtered form; a base section of said inside wall within said second chamber means formed as a passageway to allow the filtered liquid to pass therethrough; a third chamber means for receiving said filtered liquid, said third chamber means defined by said inside wall, a pair of end walls and a central wall, said central wall being lower than said inside wall and having a top surface determining the level of the filtered liquid in said third chamber means, said liquid level in said third chamber means being lower than said liquid level in said second chamber means; an outlet passageway provided adjacent said third chamber means to receive the liquid in effluent form passing over said top surface; and restriction means located in said inlet conduit to restrain the liquid flow therethrough and determine said liquid levels in said second and third chamber means.
Claim 2
Dependent Claim
337 words
A filtration system comprising an inlet passageway for receiving liquid therein in influent form having suspended solids therein, the liquid being supplied at a predetermined level in said passageway; at least one first chamber means defined by an outside wall, an inside wall, and a pair of spaced side walls, each side wall being of a vertical height less than the vertical height of said outside and inside walls; an inlet conduit connecting said inlet passageway to said first chamber means via a connection in one of said walls; second chamber means comprising at least one pair of chambers disposed respectively on either side of said first chamber means, and each second chamber defined by said inside wall, said outside wall, one of said side walls and a further side wall having a greater height than the height of said one side wall, the influent liquid in said second chamber means having a level higher than said side walls and lower than said predetermined level; said second chamber means having a base comprising filter material adapted to remove the suspended solids from the liquid while allowing the liquid to pass therethrough in filtered form; a base section of said inside wall within said second chamber means formed as a passageway to allow the filtered liquid to pass therethrough; a third chamber means for receiving said filtered liquid, said third chamber means defined by said inside wall, a pair of end walls and a central wall, said central wall being lower than said inside wall and having a top surface determining the level of the filtered liquid in said third chamber means, said liquid level in said third chamber means being lower than said liquid level in said second chamber means; an outlet passageway provided adjacent said third chamber means to receive the liquid in effluent form passing over said top surface; and restriction means located in said inlet conduit to restrain the liquid flow therethrough and determine said liquid levels in said second and third chamber means.
Claim 3
Dependent Claim
21 words
A filtration system according to claim 1 in which said restriction means comprises an orifice plate mounted in said inlet conduit.
Claim 4
Dependent Claim
19 words
A filtration system according to claim 2 in which said orifice plate is removably mounted in said inlet conduit.
Claim 5
Dependent Claim
31 words
A filtration system according to claim 1 in which said restriction means comprises a section of said inlet conduit formed of a smaller size than an adjacent part of said conduit.
Claim 6
Dependent Claim
48 words
A filtration system according to claim 1 in which an outlet conduit is connected to said first chamber means via a connection in one of said walls to be selectiveLy opened when said inlet conduit is closed to empty said first chamber means and backwash said filter material.
Claim 7
Dependent Claim
51 words
A filtration system according to claim 5 in which said difference in levels between said second chamber means and said inlet passageway decreases as said filter material clogs with suspended solids during filtration, and said filter material is subjected to the backwash when said difference is decreased to a predetermined value.
Claim 8
Dependent Claim
55 words
A filtration system according to claim 1 in which said difference in levels between said second chamber means and said inlet passageway is provided by said restriction means so that the liquid flow is restrained through said filter material in order to keep the rate of flow within limits of effectiveness of said filter material.
Claim 9
Dependent Claim
68 words
A filtration system according to claim 1 in which the liquid level in said inlet passageway is determined by the supply of influent liquid, the liquid level in said second chamber means is determined by said restriction means and the amount of suspended solids clogging filter material, and said difference in said levels determines a rate of filtration which decreases as said filter material clogs with suspended solids.
Claim 10
Dependent Claim
69 words
A filtration system according to claim 1 in which said third chamber means comprises a pair of elongated chambers spaced respectively adjacent said outlet passageway, said first chamber means comprises a plurality of chambers provided in two groups, one of said groups comprising chambers located side-by-side extending transversely to one of said elongated chambers and the other group comprising chambers located side-by-side extending transversely to the other elongated chamber.
Claim 11
Dependent Claim
23 words
A filtration system according to claim 9 in which means are provided to separate and isolate a compartment in said third chamber means.
Claim 12
Dependent Claim
22 words
A filtration system according to claim 9 in which conduit means are provided to interconnect said groups for liquid flow therethrough. 2
Claim 13
Dependent Claim
42 words
A filtration system according to claim 5 in which said inlet and outlet conduits are located adjacent each other on one side of said outside wall and manual means are positioned vertically thereabove to effect selective opening and closing of said conduits.
Claim 14
Dependent Claim
47 words
A filtration system according to claim 1 in which said passageway at the base of said inside wall is formed as an integral section to be attached to said inside wall, said integral passageway being flared outwardly towards said third chamber means to provide smooth flow therethrough.
Claim 15
Dependent Claim
24 words
A filtration system according to claim 1 in which said restriction means causes flow resistance so that said system commences operation smoothly and gradually.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |