Patent US3010791A successfully refreshed from Google Patents.
Patent US3552571A successfully refreshed from Google Patents.
US3552571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroflotation apparatus
Assignee: FMC Corp
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Filing: 1969-10-01
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Granted: 1971-01-05
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Expires: 1989-10-01
Abstract
Abstract A cylindrical-shaped tank has a grate of electrodes disposed horizontally across the open circular cross section thereof and at least one distributor arm is mounted to revolve in a horizontal plane above the grate of electrodes for evenly distributing liquid to be treated. By electrolysis of the liquid, a uniform upward flow of gas bubbles is produced to lift suspended solids and immiscible liquid to the surface of the liquid within the tank, while clarified liquid sinks downward between the bubbles towards the bottom of the tank.
Inventors
- 👤 Peter J Neuspiel
- 👤 Milton Spiegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/465
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
45 words
The apparatus described in claim 1 including a sludge collection arm located adjacent the surface of liquid in the tank and mounted to revolve in a horizontal plane about the vertical center axis of the tank, and means for withdrawing sludge collected at said arm.
Claim 2
Dependent Claim
56 words
The apparatus described in claim 2, wherein said sludge withdrawal means includes a sludge collection trough extending radially inward from the circumference of the tank aligned at the liquid surface and wherein said sludge collection arm acts as a skimmer blade to push sludge accumulating at the surface of the liquid into the sludge collection trough.
Claim 3
Dependent Claim
33 words
The apparatus described in claim 2, wherein said sludge withdrawal means comprise a series of vacuum heads mounted on the sludge collection arm for sucking sludge from the liquid surface within the tank.
Claim 4
Dependent Claim
40 words
The apparatus described in claim 2 including at least one effluent collection arm located below the grate of electrodes and mounted to revolve in a horizontal plane about the vertical center axis of the tank for collecting effluent evenly therefrom.
Claim 5
Dependent Claim
49 words
The apparatus described in claim 5 wherein said cylindrical tank has a conical-shaped bottom tapering downward towards the vertical center axis of the tank and means depend from the effluent collection arm to scrape the conical-shaped bottom as the arm revolves for moving grit towards a location for collection.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |