US4297219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temporary stream filtration system
Assignee: Kbi Corp
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Filing: 1980-01-28
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Granted: 1981-10-27
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Expires: 2000-01-28
Abstract
Abstract An apparatus constructable in situ for filtering pollutants from a flowing creek or stream, comprising one or more adjacent and/or cascaded flume-type boxes supported by the stream bed, each of which boxes comprises parallel sides, top and bottom spacers, at least one upwardly sloping ramp between the sides to form a weir edge, and one or more replaceable porous trays containing a filtering or pollutant-removing medium located directly beneath the weir edge. A slotted cover for the trays uniformly distributes the stream's contaminated water over and onto the filtering medium and a screen bottom for the trays retains the filter medium therein. The apparatus is positioned in the stream so that all the water in the stream will flow into the box or boxes, up the ramp, over the weir edge or edges, and downwardly through the filter trays before resuming its course along the stream bed. A plurality of adjacent boxes may be installed across wider streams, and gates may be provided for shutting off one or more boxes when the flow in the stream decreases.
Inventors
- 👤 Joseph R. Kirk
- 👤 Edward C. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; C02F1/28; C02F1/281; C02F1/283; C02F1/286; E; E02; E02B; E02B3/00; E02B3/02; E02B3/023; E02B5/00; E02B5/08; E02B5/085; C02F2103/00; C02F2103/007; C02F2201/00; C02F2201/008
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
131 words
A temporary method of purifying a contaminated and polluted water stream comprising: (A) inserting a temporary ramp weir in the stream, (B) forming an earth dam across said stream on each side of said ramp weir to form a dam so that all the water in said stream is caused to flow down over the weir edge of said ramp to form a falling path, (C) positioning replaceable frames of sorbent filter material in said falling path of water from said weir whereby said ramp catches the sediment in said stream at its lower end and said filter material removes chemical contaminants and pollutants from said stream that flows over said weir edge, and (D) removing said frame and said ramp weir from the stream after the stream water is purified.
Claim 2
Dependent Claim
131 words
A temporary method of purifying a contaminated and polluted water stream comprising: (A) inserting a temporary ramp weir in the stream, (B) forming an earth dam across said stream on each side of said ramp weir to form a dam so that all the water in said stream is caused to flow down over the weir edge of said ramp to form a falling path, (C) positioning replaceable frames of sorbent filter material in said falling path of water from said weir whereby said ramp catches the sediment in said stream at its lower end and said filter material removes chemical contaminants and pollutants from said stream that flows over said weir edge, and (D) removing said frame and said ramp weir from the stream after the stream water is purified.
Claim 3
Dependent Claim
16 words
A temporary method of purifying according to claim 1 comprising a plurality of adjacent ramp weirs.
Claim 4
Dependent Claim
19 words
A temporary method of purifying according to claim 2 wherein said adjacent ramp weirs are positioned successively in cascade.
Claim 5
Dependent Claim
19 words
A temporary method of purifying according to claim 2 wherein said adjacent ramp weirs are positioned side by side.
Claim 6
Dependent Claim
28 words
A temporary method of purifying according to claim 4 including the step of gating each side-by-side ramp weir to compensate for variable volumes of water in the stream.
Claim 7
Dependent Claim
176 words
A temporary apparatus for purifying a contaminated and polluted liquid stream, said apparatus comprising: (A) a pair of parallel plywood sidewalls, (B) brace means for maintaining the spacing between said sidewalls including a plywood ramp between said sidewalls extending from the bottom of said sidewalls to below the top edges of said sidewalls to provide a weir edge at the top end of said ramp, and (C) replaceable filter frame means placed between said sidewalls vertically below said weir edge of said ramp whereby the liquid in the stream passes over said weir edge and falls downwardly through said frame means, said frame means comprising: (a) rectangular sidewalls, (b) a perforated cover for distributing the liquid from said weir edge uniformly over the top of said frame means, (c) a contaminant and pollutant-removing sorbent medium inside said sidewalls, (d) screen means over the bottom of said frame means to retain said medium, and (e) supporting leg means to provide a space below said rectangular sidewalls to permit escape of said liquid from below said frame means.
Claim 8
Dependent Claim
176 words
A temporary apparatus for purifying a contaminated and polluted liquid stream, said apparatus comprising: (A) a pair of parallel plywood sidewalls, (B) brace means for maintaining the spacing between said sidewalls including a plywood ramp between said sidewalls extending from the bottom of said sidewalls to below the top edges of said sidewalls to provide a weir edge at the top end of said ramp, and (C) replaceable filter frame means placed between said sidewalls vertically below said weir edge of said ramp whereby the liquid in the stream passes over said weir edge and falls downwardly through said frame means, said frame means comprising: (a) rectangular sidewalls, (b) a perforated cover for distributing the liquid from said weir edge uniformly over the top of said frame means, (c) a contaminant and pollutant-removing sorbent medium inside said sidewalls, (d) screen means over the bottom of said frame means to retain said medium, and (e) supporting leg means to provide a space below said rectangular sidewalls to permit escape of said liquid from below said frame means.
Claim 9
Dependent Claim
13 words
An apparatus according to claim 6 wherein said sorbent medium comprises activated charcoal.
Claim 10
Dependent Claim
13 words
An apparatus according to claim 6 wherein said sorbent medium comprises peat moss.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 6 wherein said sorbent medium comprises limestone particles.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 6 wherein said sorbent medium comprises an ion exchange composition.
Claim 13
Dependent Claim
27 words
An apparatus according to claim 6 wherein said screen means comprises a fine mesh backed by a large mesh screen screen which supports said fine mesh screen.
Claim 14
Dependent Claim
15 words
An apparatus according to claim 6 wherein said sorbent medium is replaceable with fresh medium.
Claim 15
Dependent Claim
30 words
An apparatus according to claim 6 wherein a multiplicity of said frame means are placed in a cascade arrangement permitting a longer dwell time for the liquid in the sorbent.
Claim 16
Dependent Claim
52 words
An apparatus according to claim 13 wherein each frame means has a plywood floor for supporting said leg means, and said floor has a weir edge which conveys the filtered liquid from an upper frame means over its said weir edge and on to the next lower frame means of said cascade.
Claim 17
Dependent Claim
23 words
An apparatus according to claim 14 comprising a multiplicity of parallel cascades each cascade having a gate means at its uppermost weir edge.
Claim 18
Dependent Claim
36 words
An apparatus according to claim 15 wherein said gate means comprises a vertical rectangular plywood plank and vertically extending parallel slots on said parallel side walls for slidably seating the parallel vertical edges of said plank.
Claim 19
Dependent Claim
12 words
An apparatus according to claim 6 comprising a plurality of parallel apparati.
Claim 20
Dependent Claim
16 words
An apparatus according to claim 17 including separate gate means for each of said parallel apparatus.
Claim 21
Dependent Claim
17 words
An apparatus according to claim 6 wherein said frame means has handle means for its easy replacement.
References Cited (Backward Citations)
US671685A
Cited
US799180A
Cited
US802183A
Cited
US799829A
Cited
US815722A
Cited
US2746297A
Cited
US3464920A
Cited
US3890225A
Cited
US4134831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |