US4251370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for biological digestion of sewage
Assignee: Individual
•
Filing: 1979-06-26
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Granted: 1981-02-17
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Expires: 1999-06-26
Abstract
Abstract A device for biological digestion of sewage utilizes rotationally symmetric rotatable growth surfaces, preferably plastic immersion percolating filters, which filters are immersed in the sewage as they rotate. The growth surfaces are mounted upon an immersion cylinder that is rotatably driven and mounted within a gas-tight container according to a preferred embodiment. The drive for the immersion cylinder includes a drive pinion having teeth which engage stud bolts connecting rings forming part of the immersion cylinder.
Inventors
- 👤 Volker Stengelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:30
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/08; C02F3/082; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
193 words
A device for the biological digestion of sewage comprising: (a) a gas-tight container; (b) at least one rotationally symmetric immersion cylinder supported for rotation within the container, (c) a plurality of immersion growth surfaces mounted to said immersion cylinder; and (d) drive means for rotating said immersion cylinder, wherein said immersion cylinder comprises a supporting ring on one side and a drive ring on another side thereof, said rings being connected to each other by support rods distributed evenly around the periphery of the cylinder and between which rods the growth surfaces are attached, and wherein the drive means comprises a drive pinion mounted above a maximum sewage level, and the drive ring comprises two sheet iron rings on edge which are connected to each other by stud bolts and which are at a distance from each other such that the drive pinion causes the growth surfaces to rotate slowly when the pinion rotates by engagement of teeth on said pinion with the stud bolts, and further comprising two flanged guide rollers located inside outer rings of the immersion cylinder and above the maximum sewage level, said cylinder being supported on said rollers.
Claim 2
Independent Claim
193 words
A device for the biological digestion of sewage comprising: (a) a gas-tight container; (b) at least one rotationally symmetric immersion cylinder supported for rotation within the container, (c) a plurality of immersion growth surfaces mounted to said immersion cylinder; and (d) drive means for rotating said immersion cylinder, wherein said immersion cylinder comprises a supporting ring on one side and a drive ring on another side thereof, said rings being connected to each other by support rods distributed evenly around the periphery of the cylinder and between which rods the growth surfaces are attached, and wherein the drive means comprises a drive pinion mounted above a maximum sewage level, and the drive ring comprises two sheet iron rings on edge which are connected to each other by stud bolts and which are at a distance from each other such that the drive pinion causes the growth surfaces to rotate slowly when the pinion rotates by engagement of teeth on said pinion with the stud bolts, and further comprising two flanged guide rollers located inside outer rings of the immersion cylinder and above the maximum sewage level, said cylinder being supported on said rollers.
Claim 3
Dependent Claim
24 words
A device according to claim 1, wherein said growth surfaces are immersion percolating filter plates mounted to said cylinder in a positionally adjustable manner.
Claim 4
Dependent Claim
31 words
Device according to claim 1, wherein at least one further flanged guide roller is provided in internal contacting relationship with a lower range of the outer rings of the immersion cylinder.
Claim 5
Dependent Claim
21 words
Device according to claim 3, lateral alignment means for the immersion cylinder comprising pivot bearings located at sides of outer rings.
Claim 6
Dependent Claim
49 words
Device according to claim 4, characterized by the fact that the flanged guide rollers, the pivot bearings, and a drive motor connected to the drive pinion are mounted by a gas-tight flange upon the outside of the container so as to be removable for repair, maintenance or the like.
Claim 7
Dependent Claim
47 words
Device according to claims 1 or 5, comprising means for communicating an interior space within the container located above the sewage level with the outside via a sealing liquid and a pressure release valve for venting said space at an excess pressure of 500 mm water column.
Claim 8
Dependent Claim
49 words
Device according to claim 6, comprising a gas pipe fitted with a gas pressure adjusting valve leading into the interior space of the container located above the sewage level, through which pipe the type and quantity of gas optimally suited to a digestion process in question can be fed.
Claim 9
Dependent Claim
23 words
Device according to claim 6, comprising valve means for exhausting gas from the container through a range of about 2 to 500 mm.
Claim 10
Dependent Claim
17 words
Device according to claim 8, comprising a sewage inlet located slightly above a lowest anticipated sewage level.
Claim 11
Dependent Claim
37 words
Device according to claim 9, comprising an outlet pipe connected with a gutter and located slightly below the sewage inlet and which gutter is positionable at any level between the lowest sewage level and the highest level.
Claim 12
Dependent Claim
42 words
Device according to claim 1, comprising the immersion cylinder is flanged at the supporting ring, on a side opposite the drive means, onto at least one other immersion cylinder by bolts, said further cylinder having only supporting rings without a drive ring.
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |