Patent US3997436A successfully refreshed from Google Patents.
US3997436A
Expired / Lapsed
US
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Apparatus for cleaning flocculated slime and other material
Assignee: Vish Minno-Geoloshki Institute-Nis
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Filing: 1975-06-10
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Granted: 1976-12-14
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Expires: 1995-06-10
Abstract
Abstract Flocculated slime to be cleaned is introduced into the top of a vertically disposed, conical precipitator having at its bottom a discharge orifice. The introduced slime flows downwardly through an apertured plate mounted substantially horizontally in the precipitator. The plate is mechanically vibrated at a frequency in the range 20-100 Hz and an amplitude in the range 0.5-1.5 mm as the slime flows therethrough to liberate impurities mechanically trapped in the slime.
Inventors
- 👤 Stoycho Mitrev Stoev
- 👤 Roza Tzvetanova Kintisheva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:46
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
In an apparatus for cleaning flocculated material in the form of a liquid-borne suspension, a conical precipitator having a vertical axis and a bottom outlet, first inlet pipe means disposed at the upper end of the precipitator for introducing the liquid-borne material into the precipitator to flow downwardly therein, an apertured plate supported substantially horizontally in the flow path between said first inlet and said bottom outlet, a discharge pipe communicating with the bottom outlet of the precipitator, an annular chute coupled to and disposed around the top rim of the precipitator, second inlet pipe means disposed in the lower portion of the precipitator for introducing liquid therein, and means for mechanically vibrating the plate at a specified rate.
Claim 2
Dependent Claim
119 words
In an apparatus for cleaning flocculated material in the form of a liquid-borne suspension, a conical precipitator having a vertical axis and a bottom outlet, first inlet pipe means disposed at the upper end of the precipitator for introducing the liquid-borne material into the precipitator to flow downwardly therein, an apertured plate supported substantially horizontally in the flow path between said first inlet and said bottom outlet, a discharge pipe communicating with the bottom outlet of the precipitator, an annular chute coupled to and disposed around the top rim of the precipitator, second inlet pipe means disposed in the lower portion of the precipitator for introducing liquid therein, and means for mechanically vibrating the plate at a specified rate.
Claim 3
Dependent Claim
35 words
Apparatus as defined in claim 1, in which the vibrating means include means for oscillating the plate with a frequency in the range of 20-100 Hz and an amplitude in the range of 0.5-1.5 mm.
Claim 4
Dependent Claim
44 words
Apparatus as defined in claim 1, in which the vibrating means comprises, in combination, a mechanical oscillator resiliently supported above the top rim of the precipitator, and a connecting rod extending downwardly through the axis of the precipitator between the vibrator and the plate.
References Cited (Backward Citations)
US907387A
Cited
US1456563A
Cited
US1959212A
Cited
US2025412A
Cited
US2074085A
Cited
US2729330A
Cited
US2829735A
Cited
US2854136A
Cited
US2967617A
Cited
GB914207A
Cited
US3310242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |