US3786922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste treatment system with enclosed screen unit
Assignee: Dayton Manufacturing Co
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Filing: 1972-07-31
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Granted: 1974-01-22
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Expires: 1992-07-31
Abstract
Abstract A waste treatment system including means for grinding solid wastes, mixing them with liquid to form a pumpable slurry and pumping the slurry to a waste treatment tank. The waste treatment tank includes a screening section in which an enclosed screen unit is loosely received. The slurry is pumped to the interior of the screen unit for flow outwardly through the foraminous side walls thereof and thence, into a mixing section of the treatment tank. The screened waste material is mixed with chemical additives as it passes from the screening section of the treatment tank to the mixing section and a series of perforated baffles in the mixing section insure that the additives and screened waste material are intimately mixed and retained in the tank for a sufficient period of time to render the mixture pathogenically harmless before it is ejected from an outlet from the mixing section of the treatment tank.
Inventors
- 👤 V Materese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:24
CPC Classifications
E; E03; E03D; E03D9/00; E03D9/10; C; C02; C02F; C02F2103/00; C02F2103/005; C02F2201/00; C02F2201/001
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
373 words
A waste treatment system comprising: a. means defining a waste receiving bowl, b. a waste treatment tank including an upper screening section and a lower mixing section, c. means defining an inlet into said screening section of said treatment tank, d. means for macerating solid waste material deposited in said bowl, mixing said solid waste with liquid, and pumping the resulting slurry to said inlet of said waste treatment tank, e. a screen unit loosely positioned within said screening section of said treatment tank, f. said screening unit indlucing: i. spaced, parallel, substantially imperforate, top and bottom plates, ii. a wall of corrugated screening material extending between said top and bottom plates and defining therewith an interior chamber, iii. means defining an inlet into said interior chamber adjacent said bottom plate, and iv. a substantially centrally located cylindrical wall extending between said top and bottom plates and defining a passageway through said screen unit, g. a flexible conduit interconnecting said inlet to said treatment tank and said inlet to said screen unit whereby slurry pumped into said treatment tank shall flow into said interior chamber of said screen unit and outwardly thereof through said wall thereof, h. means defining a standpipe extending from a floor of said screening section of said treatment tank upwardly thereof, i. said standpipe being received in said passageway through said screening unit, j. a top cover for said treatment tank extending in spaced relationship to said top plate of said screen unit whereby said screen unit may float within said screening unit of said treatment tank, k. means for delivering a predetermined amount of chemical Waste treating additive into said mixing section of said treatment tank through said cover and floor of said screening section thereof and through said standpipe, l. means dividing said mixing section of said treatment tank into a plurality of serially interconnected chambers whereby screened waste material and chemical additives delivered to said mixing section are thoroughly mixed and retained within said treatment tank for a sufficient period of time to adequately treat said waste material and render it pathogenically harmless, and m. means defining an outlet from a last one of said serially interconnected components of said mixing section of said treatment tank.
Claim 2
Dependent Claim
373 words
A waste treatment system comprising: a. means defining a waste receiving bowl, b. a waste treatment tank including an upper screening section and a lower mixing section, c. means defining an inlet into said screening section of said treatment tank, d. means for macerating solid waste material deposited in said bowl, mixing said solid waste with liquid, and pumping the resulting slurry to said inlet of said waste treatment tank, e. a screen unit loosely positioned within said screening section of said treatment tank, f. said screening unit indlucing: i. spaced, parallel, substantially imperforate, top and bottom plates, ii. a wall of corrugated screening material extending between said top and bottom plates and defining therewith an interior chamber, iii. means defining an inlet into said interior chamber adjacent said bottom plate, and iv. a substantially centrally located cylindrical wall extending between said top and bottom plates and defining a passageway through said screen unit, g. a flexible conduit interconnecting said inlet to said treatment tank and said inlet to said screen unit whereby slurry pumped into said treatment tank shall flow into said interior chamber of said screen unit and outwardly thereof through said wall thereof, h. means defining a standpipe extending from a floor of said screening section of said treatment tank upwardly thereof, i. said standpipe being received in said passageway through said screening unit, j. a top cover for said treatment tank extending in spaced relationship to said top plate of said screen unit whereby said screen unit may float within said screening unit of said treatment tank, k. means for delivering a predetermined amount of chemical Waste treating additive into said mixing section of said treatment tank through said cover and floor of said screening section thereof and through said standpipe, l. means dividing said mixing section of said treatment tank into a plurality of serially interconnected chambers whereby screened waste material and chemical additives delivered to said mixing section are thoroughly mixed and retained within said treatment tank for a sufficient period of time to adequately treat said waste material and render it pathogenically harmless, and m. means defining an outlet from a last one of said serially interconnected components of said mixing section of said treatment tank.
Claim 3
Dependent Claim
265 words
A waste treatment system comprising: a. a waste receiving bowl, b. macerating and pumping means, c. means interconnecting said waste receiving bowl and said macerating and pumping means whereby liquids and solid wastes received in said bowl are delivered to said macerating and pumping means and macerated to slurry form, d. a waste treatment tank, e. means interconnecting said waste treatment tank and said macerating and pumping means whereby said slurry of liquids and solid wastes may be pumped from said macerating and pumping means to said waste treatment tank, f. said waste treatment tank including an upper screening section and a lower mixing section, g. a discrete, self-contained screen unit having an interior chamber with foraminous wall portions received in said upper screening section, h. means defining an inlet into said interior chamber, i. means interconnecting said screen unit inlet and said means interconnecting said waste treatment tank and said macerating and pumping means whereby said slurry is pumped directly into said interior chamber for filtering thereof as it flows outwardly through said foraminous wall portions of said screen unit into surrounding portions of said screening section, j. means providing gravity flow of the filtered slurry from said upper section to said lower mixing section, k. means for delivering a waste treating additive directly to said mixing section, l. means in said mixing section for mixing said filtered slurry and said additive and retaining the mixture thereof in said system an appreciable period of time, and m. means interconnected to a downstream portion of said mixing section for discharging said mixture from said system.
Claim 4
Dependent Claim
265 words
A waste treatment system comprising: a. a waste receiving bowl, b. macerating and pumping means, c. means interconnecting said waste receiving bowl and said macerating and pumping means whereby liquids and solid wastes received in said bowl are delivered to said macerating and pumping means and macerated to slurry form, d. a waste treatment tank, e. means interconnecting said waste treatment tank and said macerating and pumping means whereby said slurry of liquids and solid wastes may be pumped from said macerating and pumping means to said waste treatment tank, f. said waste treatment tank including an upper screening section and a lower mixing section, g. a discrete, self-contained screen unit having an interior chamber with foraminous wall portions received in said upper screening section, h. means defining an inlet into said interior chamber, i. means interconnecting said screen unit inlet and said means interconnecting said waste treatment tank and said macerating and pumping means whereby said slurry is pumped directly into said interior chamber for filtering thereof as it flows outwardly through said foraminous wall portions of said screen unit into surrounding portions of said screening section, j. means providing gravity flow of the filtered slurry from said upper section to said lower mixing section, k. means for delivering a waste treating additive directly to said mixing section, l. means in said mixing section for mixing said filtered slurry and said additive and retaining the mixture thereof in said system an appreciable period of time, and m. means interconnected to a downstream portion of said mixing section for discharging said mixture from said system.
Claim 5
Dependent Claim
30 words
The system of claim 2 wherein said screen unit comprises: a. substantially imperforate top and bottom walls, and b. said foraminous wall portions extend between said top and bottom walls.
Claim 6
Dependent Claim
16 words
The system of claim 3 wherein: a. said foraminous wall portions are of substantially corrugated configuration.
Claim 7
Dependent Claim
56 words
The system of claim 2 wherein said screen unit further comprises: a. means defining a bypass through said screen unit in a direction outwardly thereof whereby waste material may flow through said bypass means into said surrounding portions Of said screening section as said foraminous wall portions of said screen unit become clogged with solid material.
Claim 8
Dependent Claim
37 words
The system of claim 5 wherein said bypass means comprises: a. means defining an opening through said screen unit, and b. one way valve means positioned in said opening and permitting flow outwardly from said interior chamber.
Claim 9
Dependent Claim
49 words
The system of claim 2 wherein: a. said screen unit is loosely received in said screening section of said waste treatment tank, and b. said means interconnecting said interior chamber inlet and said means interconnecting said waste treatment tank and said macerating and pumping means comprises a flexible conduit.
Claim 10
Dependent Claim
58 words
The system of claim 2 wherein: a. said screen unit includes top and bottom wall portions and a substantially cylindrical portion extending between said top and bottOm wall portions, and b. said gravity flow means comprises a stand pipe projecting upwardly from a bottom wall of said upper screening sectIon within said cylindrical wall of said screen unit.
Claim 11
Dependent Claim
27 words
The system of claim 8 wherein said means for delivering waste treating additives comprises: a. conduit means extending through said stand pipe into said lower mixing section.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |