Patent US3884812A successfully refreshed from Google Patents.
US3884812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid treatment apparatus
Assignee: TDK Micronas GmbH
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Filing: 1973-12-13
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Granted: 1975-05-20
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Expires: 1993-12-13
Abstract
Abstract An apparatus for waste water treatment in which upper and lower horizontally disposed planes, each having the general configuration of an airfoil, are mounted in a ring channel. An aerator is positioned adjacent to the bottom of the channel. The forward portion of the upper plane is disposed in front of the aerator while the entire lower plane is disposed in front of the aerator near the bottom of the channel. The planes cooperate hydrodynamically in such a way that the aerator itself serves to efficiently circulate the water through the channel, as well as aerate the waste sludge in the water.
Inventors
- 👤 Hans Lindquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1278; C02F3/1284; C02F3/1236; C02F3/1257; C02F3/1294; C02F3/20; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
AN APPARATUS FOR CIRCULATING AND AERATING A BODY OF WATER CONTAINING WASTE SLUDGE COMPRISING: A CONTINUOUS CHANNEL HAVING A BOTTOM AND A PAIR OF SIDE WALLS; UPPER AND LOWER GENERALLY AIRFOIL-SHAPED PLANES SUBSTANTIALLY HORIZONTALLY DISPOSED WITHIN SAID CHANNEL PERPENDICULAR TO SAID SIDE WALLS, EACH OF SAID PLANES HAVING A LEADING EDGE AND A TRAILING EDGE WITH A CAMBER THEREBETWEEN; SAID UPPER PLANE BEING DISPOSED ABOVE SAID CHANNEL BOTTOM AND SAID LOWER PLANE BEING DISPOSED ADJACENT TO SAID CHANNEL BOTTOM, WITH THE CAMBERS OF SAID PLANCES FACING ONE ANOTHER; THE TRAILING EDGE OF SAID LOWER PLANE BEING DISPOSED IN FRONT OF THE TRAILING EDGE OF SAID UPPER PLANE AND BELOW THE FORWARD PORTION OF SAID UPPER PLANE; MEANS FOR INTRODUCING AIR INTO SAID CHANNEL IMMEDIATELY ADJACENT TO SAID LOWER PLANE TRAILING EDGE; THE HEIGHT OF EACH SAID PLANE BEING WITHIN THE RANGE OF ABOUT 1/4 AND 3/4 OF THE DISTANCE BETWEEN SAID BOTTOM OF SAID CHANNEL AND THE TOP OF SAID UPPER PLANE; AND THE LENGTH OF EACH SAID PLANE BEING FROM ABOUT 4 TO 20 TIMES GREATER THAN THE HEIGHT THEREOF.
Claim 2
Independent Claim
181 words
AN APPARATUS FOR CIRCULATING AND AERATING A BODY OF WATER CONTAINING WASTE SLUDGE COMPRISING: A CONTINUOUS CHANNEL HAVING A BOTTOM AND A PAIR OF SIDE WALLS; UPPER AND LOWER GENERALLY AIRFOIL-SHAPED PLANES SUBSTANTIALLY HORIZONTALLY DISPOSED WITHIN SAID CHANNEL PERPENDICULAR TO SAID SIDE WALLS, EACH OF SAID PLANES HAVING A LEADING EDGE AND A TRAILING EDGE WITH A CAMBER THEREBETWEEN; SAID UPPER PLANE BEING DISPOSED ABOVE SAID CHANNEL BOTTOM AND SAID LOWER PLANE BEING DISPOSED ADJACENT TO SAID CHANNEL BOTTOM, WITH THE CAMBERS OF SAID PLANCES FACING ONE ANOTHER; THE TRAILING EDGE OF SAID LOWER PLANE BEING DISPOSED IN FRONT OF THE TRAILING EDGE OF SAID UPPER PLANE AND BELOW THE FORWARD PORTION OF SAID UPPER PLANE; MEANS FOR INTRODUCING AIR INTO SAID CHANNEL IMMEDIATELY ADJACENT TO SAID LOWER PLANE TRAILING EDGE; THE HEIGHT OF EACH SAID PLANE BEING WITHIN THE RANGE OF ABOUT 1/4 AND 3/4 OF THE DISTANCE BETWEEN SAID BOTTOM OF SAID CHANNEL AND THE TOP OF SAID UPPER PLANE; AND THE LENGTH OF EACH SAID PLANE BEING FROM ABOUT 4 TO 20 TIMES GREATER THAN THE HEIGHT THEREOF.
Claim 3
Dependent Claim
23 words
An apparatus as set forth in claim 1 wherein: said air introducing means comprises an aerator for admitting small bubbles into said water.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |