US3883432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for purifying and disinfecting waste water
Assignee: HILDEBRAND KARL#HEINZ
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Filing: 1973-09-13
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Granted: 1975-05-13
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Expires: 1993-09-13
Abstract
Abstract A system for purifying and disinfecting waste water including container housing a disintegrating pump, a mixing vessel downstream from said container, and a closed vessel downstream from said mixing vessel, said closed vessel housing a filter device and means for introducing a controlled amount of chemicals into the waste water.
Inventors
- 👤 Karl-Heinz Hildebrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:30
CPC Classifications
C; C02; C02F; C02F9/00; B; B01; B01D; B01D36/00; B01D36/04; B01D37/00; B01D37/03; C02F1/00; C02F1/001; C02F1/50; C02F1/72; C02F1/76; C02F11/00; C02F11/12; C02F2103/00; C02F2103/003; C02F2201/00; C02F2201/001; C02F2303/00; C02F2303/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
230 words
A system for the continuous purification and disinfection of sewage comprising: a first mixing tank for homogenizing the sewage, said first mixing tank having a sewage inlet, a drain for solid substances which collect on the bottom of said first mixing tank and a sewage discharge leading to a feed back line returning to said first mixing tank and wherein a pump and a disintegrating means are arranged in said line, said first mixing tank including a reservoir positioned thereabove and wherein a sewage outlet is located; a second mixing tank arranged downstream from said reservoir having a sewage inlet connecTed with the sewage outlet of said reservoir, a sewage outlet and at least one inlet for chemicals; a closed vessel having an upper tangential inlet which is connected with the sewage outlet of said second mixing tank and which opens into an outer annular chamber, said outer chamber being open at the bottom and in communication with an inner annular chamber which is in communication with an outlet of said closed vessel, each of said outer and inner annular chambers being in communication with a third chamber positioned below said first and second annular chambers and provided with a sludge drain; a filter associated with said closed vessel and arranged downstream from said upper tangential inlet of said closed vessel; and a disinfecting means positioned downstream from said filter.
Claim 2
Independent Claim
230 words
A system for the continuous purification and disinfection of sewage comprising: a first mixing tank for homogenizing the sewage, said first mixing tank having a sewage inlet, a drain for solid substances which collect on the bottom of said first mixing tank and a sewage discharge leading to a feed back line returning to said first mixing tank and wherein a pump and a disintegrating means are arranged in said line, said first mixing tank including a reservoir positioned thereabove and wherein a sewage outlet is located; a second mixing tank arranged downstream from said reservoir having a sewage inlet connecTed with the sewage outlet of said reservoir, a sewage outlet and at least one inlet for chemicals; a closed vessel having an upper tangential inlet which is connected with the sewage outlet of said second mixing tank and which opens into an outer annular chamber, said outer chamber being open at the bottom and in communication with an inner annular chamber which is in communication with an outlet of said closed vessel, each of said outer and inner annular chambers being in communication with a third chamber positioned below said first and second annular chambers and provided with a sludge drain; a filter associated with said closed vessel and arranged downstream from said upper tangential inlet of said closed vessel; and a disinfecting means positioned downstream from said filter.
Claim 3
Dependent Claim
33 words
The system according to claim 1 wherein said closed vessel includes an outer annular chamber, a filter and a pipe connected with said disinfecting means arranged concentrically from the outside to the inside.
Claim 4
Dependent Claim
83 words
The system according to claim 1 wherein a third mixing tank is arranged downstream from the sludge drain of said closed vessel, said third mixing tank including a bottom conical end and a sludge outlet having in its central part a rotating mixing blade and in its upper part an inlet for air and an inlet for a dosage of chlorine, said system further including a feed pump and a sludge densifier arranged downstream from the sludge drain of said third mixing tank.
Claim 5
Dependent Claim
15 words
The system according to claim 1 wherein said first mixing tank has a spherical bottom.
Claim 6
Dependent Claim
22 words
The system according to claim 1 wherein said pump is of such a nature that it performs a disintegrating function when pumping.
Claim 7
Dependent Claim
62 words
The system according to claim 1 wherein said second mixing tank includes an annular cylindrical space, the upper part of which communicates tangentially with the sewage inlet of said second mixing tank and the bottom part of which has an inlet for a flocculating reagent, said second mixing tank further having a centrally located pipe connected to it having an upper outlet.
Claim 8
Dependent Claim
21 words
The system according to claim 1 having between said reservoir and said closed vessel in series three dosage devices for reagents.
Claim 9
Dependent Claim
50 words
The system according to claim 7 having the inlet of the first device between said reservoir and said second mixing tank, the inlet of the second device in the lower part of said mixing tank and the inlet of the third device between said mixing tank and said closed vessel.
References Cited (Backward Citations)
US1505104A
Cited
US3313725A
Cited
US3444077A
Cited
US3480543A
Cited
US3434598A
Cited
US3577341A
Cited
US3541594A
Cited
US3651944A
Cited
US3637487A
Cited
US3664951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |