US3705650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum flotation device
Assignee: Individual
•
Filing: 1970-11-09
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Granted: 1972-12-12
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Expires: 1990-11-09
Abstract
Abstract A vacuum foam flotation apparatus for treatment of turbid liquids in which the liquids flow in a trough in an evacuated housing, while conveying means move laterally of the trough and displace foam from the surface of the liquid in the trough into foam pockets arranged along the side of the trough. At least the first portion of the trough has laminar liquid flow therein, while agitating means may be provided to agitate the liquid in the trough beyond the region of laminar flow.
Inventors
- 👤 August Gotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1431; B03D1/02; B03D1/04; B03D1/1406; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/1481; B03D1/1493; B03D1/16; B03D1/028
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
88 words
In a vacuum foam flotation device: a housing, means for maintaining said housing at subatmospheric pressure, a trough in said housing and opening upwardly, means for supplying turbid liquid to said trough for flow therealong in said housing, foam pocket means in the housing laterally along at least one side of said trough, and foam stripper means movably mounted in said housing above said trough and movable therein in a direction to convey foam evacuated from above the turbid liquid in said trough to said foam pocket means.
Claim 2
Dependent Claim
88 words
In a vacuum foam flotation device: a housing, means for maintaining said housing at subatmospheric pressure, a trough in said housing and opening upwardly, means for supplying turbid liquid to said trough for flow therealong in said housing, foam pocket means in the housing laterally along at least one side of said trough, and foam stripper means movably mounted in said housing above said trough and movable therein in a direction to convey foam evacuated from above the turbid liquid in said trough to said foam pocket means.
Claim 3
Dependent Claim
33 words
A foam flotation device according to claim 1 in which said trough extends generally horizontally in said housing and said trough increases in depth in the direction of flow of turbid liquid therein.
Claim 4
Dependent Claim
33 words
A foam flotation device according to claim 1 in which said trough extends generally horizontally in said housing and said trough increases in width in the direction of flow of turbid liquid therein.
Claim 5
Dependent Claim
22 words
A foam flotation device according to claim 1 which includes means for varying level of the turbid liquid flow in said trough.
Claim 6
Dependent Claim
48 words
A foam flotation device according to claim 4 in which said foam pocket means includes a plurality of individual foam pockets in side by side relation along said trough, division walls between adjacent ones of said foam pockets, and a discharge conduit leading from each said foam pocket.
Claim 7
Dependent Claim
36 words
A foam flotation device according to claim 1 in which said means for supplying liquid to said trough comprises a supply nozzle which tapers to widen steadily outwardly in a direction toward width of said trough.
Claim 8
Dependent Claim
62 words
A foam flotation device according to claim 1 which includes means for supplying further air to said turbid liquid in a region spaced from the point of supply of the turbid liquid to said trough for augmenting the flotation process after the air entrained in the turbid liquid has passed off to such an extent that the flotation process is substantially diminished.
Claim 9
Dependent Claim
31 words
A foam flotation device according to claim 1 which includes means defining a flotation region under atmospheric pressure for receiving turbid liquid that has been subjected to suction in said trough.
Claim 10
Dependent Claim
53 words
A foam flotation device according to claim 1 in which the liquid flows in said trough in substantially laminar flow from the point of supply of the liquid to the trough, and means spaced from said point of supply for creating turbulence in the turbid liquid flow in downstream direction of the trough.
Claim 11
Dependent Claim
53 words
A foam flotation device according to claim 9 in which said means for creating turbulence in said liquid comprises an impact screen disposed ending in spaced relationship transversely below the surface of the liquid in the trough and spaced along the trough from the point of supply of the liquid to the trough.
Claim 12
Dependent Claim
83 words
A foam flotation device according to claim 9 in which said means for creating turbulence in the turbid liquid at a region spaced from the point of supply of the turbid liquid to said trough comprises fluid pervious outflow bodies below the level of the turbid liquid in said trough and adapted for passing fluid in either steady or pulsating flow to the liquid in the trough in a direction substantially transverse to the direction of flow of the fluid in the trough.
Claim 13
Dependent Claim
30 words
A foam flotation device according to claim 11 in which the fluid introduced through the fluid pervious outflow bodies is additional liquid that is saturated under overpressure with a gas.
Claim 14
Dependent Claim
36 words
A foam flotation device according to claim 12 in which said additional liquid introduced through said fluid pervious outflow bodies is admixed with flotation reagents for introduction transversely into the turbid liquid flowing in said trough.
Claim 15
Dependent Claim
32 words
A foam flotation device according to claim 9 in which said means for creating turbulence in the turbid liquid flowing in said trough comprises a mechanical agitating mechanism spaced from liquid supply.
Claim 16
Dependent Claim
56 words
A foam flotation device according to claim 14 in which the bottom wall of said trough is provided with means forming a recess, said agitating mechanism being located within said recess, said agitating mechanism comprising blade means for driving liquid in the upward direction, and a quieting grate in said trough positioned above said agitating mechanism.
Claim 17
Dependent Claim
70 words
A foam flotation device according to claim 15 in which said trough includes a partition immediately upstream of said agitating mechanism having an opening near the lower end for the flow of turbid liquid to said agitating mechanism whereby the turbid liquid in said trough moves with laminar flow upstream of said partition and the agitation created by said agitating mechanism is confined to the region downstream of said partition.
Claim 18
Dependent Claim
54 words
A foam flotation device according to claim 16 which includes fluid supply means leading into said trough adjacent said agitating mechanism for the supply of fluid gaseously saturated under overpressure to the turbid liquid in the trough in the region thereOf where the said agitating means creates turbulence in the liquid in said trough.
Claim 19
Dependent Claim
65 words
A foam flotation device according to claim 1 which includes means for bypassing turbid liquid from said trough at a point spaced from the point of supply of the turbid liquid thereto out of the subatmospheric pressure maintained within the housing and means for returning the thus bypassed turbid liquid back into a condition of subatmospheric pressure for continuation of the vacuum foam flotation process.
Claim 20
Dependent Claim
35 words
A foam flotation device according to claim 18 in which said means for bypassing turbid liquid includes a container open to the atmosphere for intermediately venting and adapted for receiving the said bypassed turbid liquid.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |