US4272489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for composting refuse and sewage slurry
Assignee: Ruthner Industrieanlagen AG
•
Filing: 1978-11-21
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Granted: 1981-06-09
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Expires: 1998-11-21
Abstract
Abstract A device for composting refuse and sewage slurry, consisting of a rotating drum supporting substantially horizontally with a fixed front wall through which refuse and sewage slurry are fed to the drum, and a fixed rear wall through which the mixture in the drum may be extracted. Means are provided enabling air or another gas containing oxygen, to be passed through the drum either from the front to rear or vice versa. The gas flow is adjustable by regulators in the pipelines taking air to and from the drum. The pipeline supplying air to the drum may be connected to a blower, and means may be provided for regulating the temperature in the drum, and for the complete or partial return of air sucked out of the drum to the drum.
Inventors
- 👤 Willibald Lutz
- 👤 Heinz Mooss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:53
CPC Classifications
C; C05; C05F; C05F17/00; C05F17/90; C05F17/921; C05F17/929; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02W; Y02W30/00; Y02W30/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A device for composting refuse and sewage slurry, comprising a rotatable drum supported substantially horizontally having a fixed front wall through which refuse and sewage slurry may be fed to the drum, and a fixed rear wall through which the mixture in the drum may be removed, said fixed walls having introducing and extracting means for introducing an oxygen containing gas mixture through one wall and for extracting the gas mixture through the other of said walls, said introducing and extracting means being operable to control the direction and rate of gas mixture flow through the drum and including a gas pipeline having a regulator provided at each end of the drum, said regulators being connectable to a blower such that the direction of gas mixture flow in the drum may be effected both from the front to the rear of the drum and from the rear to the front of the drum.
Claim 2
Independent Claim
153 words
A device for composting refuse and sewage slurry, comprising a rotatable drum supported substantially horizontally having a fixed front wall through which refuse and sewage slurry may be fed to the drum, and a fixed rear wall through which the mixture in the drum may be removed, said fixed walls having introducing and extracting means for introducing an oxygen containing gas mixture through one wall and for extracting the gas mixture through the other of said walls, said introducing and extracting means being operable to control the direction and rate of gas mixture flow through the drum and including a gas pipeline having a regulator provided at each end of the drum, said regulators being connectable to a blower such that the direction of gas mixture flow in the drum may be effected both from the front to the rear of the drum and from the rear to the front of the drum.
Claim 3
Dependent Claim
34 words
A device according to claim 1, including means for the regulation of temperature in the drum and means for the complete or partial return of gas mixture extracted from the drum to the drum.
Claim 4
Dependent Claim
28 words
A device according to claim 1 or claim 2, wherein the means for introducing said gas mixture to the drum is adapted to pass air to said drum.
Claim 5
Dependent Claim
73 words
A device according to claim 1, wherein said introducing and extracting means further comprises a first pipeline in fluid communication with one end of said rotatable drum and a second pipeline in fluid communication with the other end of said rotatable drum, ends of said first and said second pipelines being spaced from the interior of said rotatable drum so that said pipelines are free from contact with material inside of said drum.
Claim 6
Dependent Claim
48 words
A device according to claim 1, further comprising a feed hopper connected to said fixed front wall for introducing refuse into said rotatable drum, and a pipeline passing through said feed hopper into said rotatable drum for introducing sewage slurry directly into the interior of said rotatable drum.
Claim 7
Dependent Claim
32 words
A device according to claim 5, wherein said introducing and extracting means further comprises a pipeline connected to said hopper for selectively introducing and extracting a gas mixture from said rotatable drum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |