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US4871454A Expired / Lapsed US ⏱️ 0.0 years remaining

Portable dumpster slurry separating system

Assignee: INTERA Inc A CORP OF TEXAS
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Filing: 1988-06-27
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Granted: 1989-10-03
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Expires: 2008-06-27
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Abstract

Abstract Discloses apparatus for separating the solids from a liquid of a sludge or slurry which includes a slurry source, a slurry container receiving slurry from the source and a filter cage removably mounted inside the container. The filter cage includes a cage frame, a supported screen liner mounted within the cage and a filter liner removably fitted inside the liner. The container has a liquid drainage conduit removably connected to a suction device for removing liquid from the drainage chamber. The container is constructed and adapted to be picked up, carried about, and tilted to remove solid material deposited within the filter cage. The filter cage is constructed and adapted to be hoisted up out of the container and separately moved about and tilted to remove solids deposited within the filter cage. A liquid injection apparatus may be provided for injecting a selected amount of a flocculating agent into the slurry received into the container to cause flocculation of solid particles in the slurry. Also discloses the steps of the method of extracting liquid from a slurry and disposing the remaining solids.

Inventors

  • 👤 W. Gerald Lott

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 20:25
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/96; B01D2201/00; B01D2201/10

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 244 words
Portable apparatus for removing liquid from a liquid-solid slurry, comprising: (a) a transportable and tiltable receiving hopper vessel adapted to receive a liquid-solid slurry and adapted to be discharged when tilted; (b) a removable rigid screen cage frame conforming to the entire interior of said hopper vessel and providing flow passage for liquid flow from within said cage frame out through the sides and bottom of said cage frame to the bottom of said hopper vessel; (c) a flow screen attached to the interior of said cage frame and providing liquid flow through said flow screen into said flow passages; (d) said flow screen being comprised of rigid perforated plate adapted to structurally reinforce said screen cage framework; (e) a plurality of lifting eyes attached with the top of said cage frame to facilitate lifting said cage frame out of said hopper vessel; (f) a removable filter media conforming to the interior of said flow screen and being supported by said flow screen, wherein said removable filter media is constructed and arranged to allow said media and its contents to be lifted out of said flow screen and screen cage frame; (g) a flow passage permitting flow of liquid out from the bottom of said hopper vessel; (h) a moveable flow conduit connected through a quick-disconnect coupling means to said flow passage and also connected to a suction connection of a suction pump means; and (i) said suction pump means being a peristaltic pump.
Claim 2
Dependent Claim 244 words
Portable apparatus for removing liquid from a liquid-solid slurry, comprising: (a) a transportable and tiltable receiving hopper vessel adapted to receive a liquid-solid slurry and adapted to be discharged when tilted; (b) a removable rigid screen cage frame conforming to the entire interior of said hopper vessel and providing flow passage for liquid flow from within said cage frame out through the sides and bottom of said cage frame to the bottom of said hopper vessel; (c) a flow screen attached to the interior of said cage frame and providing liquid flow through said flow screen into said flow passages; (d) said flow screen being comprised of rigid perforated plate adapted to structurally reinforce said screen cage framework; (e) a plurality of lifting eyes attached with the top of said cage frame to facilitate lifting said cage frame out of said hopper vessel; (f) a removable filter media conforming to the interior of said flow screen and being supported by said flow screen, wherein said removable filter media is constructed and arranged to allow said media and its contents to be lifted out of said flow screen and screen cage frame; (g) a flow passage permitting flow of liquid out from the bottom of said hopper vessel; (h) a moveable flow conduit connected through a quick-disconnect coupling means to said flow passage and also connected to a suction connection of a suction pump means; and (i) said suction pump means being a peristaltic pump.
Claim 3
Dependent Claim 20 words
The apparatus of claim 1 wherein said filter media is a material having porosity in the range of 1-1000 microns.
Claim 4
Dependent Claim 53 words
The apparatus of claim 2 wherein said hopper vessel is adapted to be attached to a lift transport apparatus and further includes releasable latch and trunnion means to permit tilting of said hopper vessel for dumping; and wherein said apparatus further includes flocculating means for introducing a flocculating agent into said liquid-solid slurry.
Claim 5
Dependent Claim 21 words
The apparatus of claim 1 wherein said apparatus further includes flocculating means for introducing a flocculating agent into said liquid-solid slurry.
Claim 6
Dependent Claim 36 words
The apparatus of claim 1 wherein said hopper vessel is adapted to be attached to a lift transport apparatus and further includes releasable latch and trunnion means to permit tilting of said hopper vessel for dumping.
Claim 7
Dependent Claim 53 words
The apparatus of claim 1 wherein said hopper vessel is adapted to be attached to a lift transport apparatus and further includes releasable latch and trunnion means to permit tilting of said hopper vessel for dumping; and wherein said apparatus further includes flocculating means for introducing a flocculating agent into said liquid-solid slurry.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-10-02 1993-04-03 1993-10-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-10-02 1997-04-03 1997-10-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-10-02 2001-04-03 2001-10-03 $7700.00 Window Closed / Lapsed

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