US3782555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed distribution means for vacuum filters
Assignee: Envirotech Corp
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Filing: 1972-04-03
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Granted: 1974-01-01
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Expires: 1992-04-03
Abstract
Abstract A liquid feed distribution trough having an arcuate bottom is mounted horizontally along the upper edge of a rotary drum filter tank. Within the feed distribution trough, an elongated paddle wheel is rotatably mounted for distributing a liquid containing particulates evenly throughout the trough. The edge of the trough is provided with a curved overflow lip to permit the uniformly distributed feed to gravitationally flow from the trough into the tank. The particulates are subsequently separated from the liquid by the rotary drum filter.
Inventors
- 👤 D Solum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:58
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/70; B01D33/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
In a rotary drum vacuum filter of the type including a tank formed with ends and sidewalls and having a filter drum journalled in said ends for rotation in said tank, improved feed supply means comprising an elongated arcuate-bottomed trough extending along, adjacent to and above the top edge of one tank sidewall, one wall of said trough forming a lower overflow edge, means for supplying feed liquid into said trough and means for effecting even flow of said liquid over said edge for distribution along the length of said tank, said means comprising an elongated starwheel journalled for rotation in said trough, means for driving said starwheel, and an elongated lip connected to said edge along the length of the trough said lip being formed to slope downwardly from said edge to terminate in said tank at an elevation below said top edge of said one tank sidewall.
Claim 2
Dependent Claim
149 words
In a rotary drum vacuum filter of the type including a tank formed with ends and sidewalls and having a filter drum journalled in said ends for rotation in said tank, improved feed supply means comprising an elongated arcuate-bottomed trough extending along, adjacent to and above the top edge of one tank sidewall, one wall of said trough forming a lower overflow edge, means for supplying feed liquid into said trough and means for effecting even flow of said liquid over said edge for distribution along the length of said tank, said means comprising an elongated starwheel journalled for rotation in said trough, means for driving said starwheel, and an elongated lip connected to said edge along the length of the trough said lip being formed to slope downwardly from said edge to terminate in said tank at an elevation below said top edge of said one tank sidewall.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |