US3754656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floatation separators
Assignee: Kurita Water Industries Ltd
•
Filing: 1971-09-14
•
Granted: 1973-08-28
•
Expires: 1991-09-14
Abstract
Abstract A floatation separator comprises a floatation tank containing a plurality of vertically spaced apart parallel inclined plates for defining a plurality of parallel inclined chambers in which impurities are separated from the water to be treated by floatation. Each inclined chamber is provided with an inlet port for the water to be treated near its upper end and a discharge port for the treated water near the lower end thereof intermediate the upper and lower inclined plates of a chamber.
Inventors
- 👤 T Horiguchi
- 👤 K Tagomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:56
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1431; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/1481; C; C02; C02F; C02F1/00; C02F1/24; Y; Y02; Y02W; Y02W10/00; Y02W10/30; Y02W10/33
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
167 words
A floatation separator comprising: a floatation tank; a plurality of vertically spaced apart substantially parallel inclined plates mounted in said tank for defining a plurality of substantially parallel inclined chambers; an inlet port for the water to be treated, said inlet port being positioned near the upper end of each inclined chamber close to the upper inclined plate defining each inclined chamber; a plurality of upwardly extending guide plates extending from the upper ends of said inclined plates respectively, said guide plates extending upwardly at a steeper angle than said inclined plates, said guide plates defining a discharge port for the froths at the upper end of each inclined chamber, and definining at least one froth floating passage extending between said froth discharge ports and the upper portion of said floatation tank; and a discharge port for the treated water at the lower end of each inclined chamber, said treated water discharge port being located intermediate the adjacent upper and lower inclined plates which define a chamber.
Claim 2
Dependent Claim
167 words
A floatation separator comprising: a floatation tank; a plurality of vertically spaced apart substantially parallel inclined plates mounted in said tank for defining a plurality of substantially parallel inclined chambers; an inlet port for the water to be treated, said inlet port being positioned near the upper end of each inclined chamber close to the upper inclined plate defining each inclined chamber; a plurality of upwardly extending guide plates extending from the upper ends of said inclined plates respectively, said guide plates extending upwardly at a steeper angle than said inclined plates, said guide plates defining a discharge port for the froths at the upper end of each inclined chamber, and definining at least one froth floating passage extending between said froth discharge ports and the upper portion of said floatation tank; and a discharge port for the treated water at the lower end of each inclined chamber, said treated water discharge port being located intermediate the adjacent upper and lower inclined plates which define a chamber.
Claim 3
Dependent Claim
34 words
The floatation separator according to claim 1 comprising a plurality of sludge discharge ports at the lower end of respective inclined chambers, said sludge discharge ports being below the respective treated water discharge ports.
Claim 4
Dependent Claim
25 words
The floatation separator according to claim 2 wherein said sludge discharge ports are located adjacent the inclined plates defining the floors of respective inclined chambers.
Claim 5
Dependent Claim
35 words
The floatation separator according to claim 1 wherein a plurality of independent froth floating passages are formed outside said floatation tank to connect said froth discharge ports to the upper portion of said floatation tank.
Claim 6
Dependent Claim
60 words
The floatation separator according to claim 1 wherein said guide plates are curved and have substantially vertical portions, the vertical porTions of said curved guide plates being aligned substantially vertically to define a common froth floating passage, the upper ends of said guide plates terminating close to adjacent ones of said inclined plates to define said froth discharge ports therebetween.
Claim 7
Dependent Claim
21 words
The floatation separator according to claim 5 wherein said inclined and guide plates are all substantially identical in size and shape.
Claim 8
Dependent Claim
38 words
The floatation separator according to claim 1 wherein a pipe for admitting rinsing water is provided at the upper portion of each inclined chamber and an air diffuser is provided at the lower portion of each inclined chamber.
Claim 9
Dependent Claim
66 words
The floatation separator according to claim 1 which further comprises a main pipe for feeding the water to be treated, a coagulation tank connected to said main pipe, means for supplying a coagulation agent for said coagulation tank, a distributor tank connected between said coagulation tank and said inlet ports and means for supplying to said inlet ports pressurized water containing gas or air dissolved therein.
Claim 10
Dependent Claim
43 words
The floatation separator according to claim 8 wherein said coagulation tank comprises an outer cylinder and an inner cylinder having a closed upper end, and a pipe connected to said main pipe and extending near the closed upper end of said inner cylinder.
Claim 11
Dependent Claim
24 words
The floatation separator according to claim 8 wherein said pressurized water supply means includes a device for dissolving gas or air in pressurized water.
Claim 12
Dependent Claim
85 words
The floatation separator according to claim 10 wherein said device comprises an ejector for admixing water and gas, means for supplying pressurized water to said ejector, means for supplying said gas to the negative pressure side of said ejector, a vertical output tube for receiving the mixture of said water and said gas from said ejector, a gas separating tank connected to the opposite end of said vertical pipe, and means for returning the gas separated in said gas separating tank back to said ejector.
Claim 13
Dependent Claim
40 words
The floatation separator according to claim 11, wherein said vertical outlet pipe takes the form of a hair pin and said vertical outlet pipe is terminated with a horizontal section at said opposite end connected to said gas separating tank.
Claim 14
Dependent Claim
19 words
The floatation separator according to claim 1 wherein said inclined plates are inclined at an angle of about 45*.
Claim 15
Dependent Claim
16 words
The floatation separator according to claim 1 wherein said tank is square or rectangular in cross-section.
Claim 16
Dependent Claim
18 words
The floatation separator according to claim 1 wherein said guide plates are connected to their respective inclined plates.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |