Patent US4253904A successfully refreshed from Google Patents.
Patent US3847808A successfully refreshed from Google Patents.
US3847808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating sludge
Assignee: Individual
•
Filing: 1973-03-27
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Granted: 1974-11-12
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Expires: 1993-03-27
Abstract
Abstract A method and apparatus for treating sludge including a sludge bed of blocks constructed of load-bearing material, a plurality of openings in the blocks, and cartridges filled with filter material positioned in the openings. Scraping the dried sludge off of the blocks without disturbing the filter material in the cartridges.
Inventors
- 👤 G Spohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:16
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/32; B01D25/38; B01D24/00; B01D24/002; B01D24/02; B01D24/20; B01D24/22; B01D24/46; B01D24/4605; B01D24/461
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
A SLUDGE DRYING BED COMPRISING: A. A BLOCK OF MATERIAL HAVING A TOP SURFACE AND BEING CAPABLE OF SUPPORTING A HEAVY LOAD THEREON AND HAVING A PLURALITY OF OPENING EXTENDING THERETHROUGH, B. A CARTRIDGE POSITIONED IN EACH OPENING AND FILTER MATERIAL POSITIONED IN EACH OF SAID CARTIDGES EXTENDING AT LEAST CLOSE C. THE TOPS OF SAID CARTRIDGES EXTENDING AT LEAST CLOSE TO BUT NO HIGHER THAN THE TOP SURFACE OF SAID BLOCK, D. SAID CARTRIDGE FURTHER BEING SUBSTANTIALLY OPEN AT THE TOP AND SUFFICIENTLY CLOSED AT THE BOTTOM TO RETAIN THE FILTER MATERIAL THEREIN, AND OPENINGS IN SAID BOTTOM WHEREBY WATER AND THE LIKE CAN DRAIN THERETHROUGH, C. AN OUTER PERIPHERAL EDGE EXTENDING SUBSTANTIALLY ABOVE THE TOP OF THE CARTIDGES TO RETAIN SLUDGE AND WATER THEREIN, AND A SLOT IN SAID PERIPHERAL EDGE WHEREBY BOUND WATER CAN FLOW OFF THE RETAIN SLUDGE, AND F. MEANS FOR SCRAPING THE SLUDGE OFF SAID BLOCK WITHOUT DISTURBING THE FILTER MATERIAL IN SAID CARTRIDGES.
Claim 2
Dependent Claim
160 words
A SLUDGE DRYING BED COMPRISING: A. A BLOCK OF MATERIAL HAVING A TOP SURFACE AND BEING CAPABLE OF SUPPORTING A HEAVY LOAD THEREON AND HAVING A PLURALITY OF OPENING EXTENDING THERETHROUGH, B. A CARTRIDGE POSITIONED IN EACH OPENING AND FILTER MATERIAL POSITIONED IN EACH OF SAID CARTIDGES EXTENDING AT LEAST CLOSE C. THE TOPS OF SAID CARTRIDGES EXTENDING AT LEAST CLOSE TO BUT NO HIGHER THAN THE TOP SURFACE OF SAID BLOCK, D. SAID CARTRIDGE FURTHER BEING SUBSTANTIALLY OPEN AT THE TOP AND SUFFICIENTLY CLOSED AT THE BOTTOM TO RETAIN THE FILTER MATERIAL THEREIN, AND OPENINGS IN SAID BOTTOM WHEREBY WATER AND THE LIKE CAN DRAIN THERETHROUGH, C. AN OUTER PERIPHERAL EDGE EXTENDING SUBSTANTIALLY ABOVE THE TOP OF THE CARTIDGES TO RETAIN SLUDGE AND WATER THEREIN, AND A SLOT IN SAID PERIPHERAL EDGE WHEREBY BOUND WATER CAN FLOW OFF THE RETAIN SLUDGE, AND F. MEANS FOR SCRAPING THE SLUDGE OFF SAID BLOCK WITHOUT DISTURBING THE FILTER MATERIAL IN SAID CARTRIDGES.
Claim 3
Dependent Claim
17 words
A filter as defined in claim 1 including a plurality of said blocks positioned adjacent one another.
Claim 4
Dependent Claim
23 words
A filter as defined in claim 1 including drain means associated with said slots to receive the bound water flowing through said slots.
Claim 5
Dependent Claim
16 words
A filter as defined in claim 1 wherein said cartridges include means for facilitating their removal.
Claim 6
Dependent Claim
29 words
A filter as defined in claim 4 wherein said facilitating means includes a pair of openings in a wall of the cartridge for receiving a lifting handle inserted therein.
Claim 7
Dependent Claim
24 words
A filter as defined in claim 1 including track means on said block for receiving a vehicle having thereon means for scraping the sludge.
Claim 8
Dependent Claim
46 words
A filter as defined in claim 1 including at least one additional cartridge extending above the remainder of said cartridges, said additional cartridge being provided with at least one slot in the extended wall area to receive bound water flowing off the top of the sludge.
Claim 9
Independent Claim
97 words
A method of filtering sewage material and removing sludge therefrom comprising: a. providing a sludge drying bed of heavy load-bearing material, b. placing a large number of openings in said bearing material, the tops of said openings extending no higher than said drying bed, c. placing filter material in said openings, d. flowing said sludge onto said bed, e. allowing said sludge to at least partially dry, f. removing the bound water accumulated above the sludge being dried, g. scraping the at least partially dried sludge from said bed without disturbing the filter material in said openings.
Claim 10
Independent Claim
97 words
A method of filtering sewage material and removing sludge therefrom comprising: a. providing a sludge drying bed of heavy load-bearing material, b. placing a large number of openings in said bearing material, the tops of said openings extending no higher than said drying bed, c. placing filter material in said openings, d. flowing said sludge onto said bed, e. allowing said sludge to at least partially dry, f. removing the bound water accumulated above the sludge being dried, g. scraping the at least partially dried sludge from said bed without disturbing the filter material in said openings.
Claim 11
Dependent Claim
17 words
A method as defined in claim 8 including placing the filter material in cartridges in the openings.
Claim 12
Dependent Claim
23 words
A method as defined in claim 9 including the step of removing the cartridges from the openings and changing the filter material therein.
Claim 13
Dependent Claim
22 words
A method as defined in claim 8 wherein said scraping step is performed by an occupant driven vehicle moving over the bed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |