Patent US3617543A successfully refreshed from Google Patents.
US3617543A
Expired / Lapsed
US
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Filtering and concentrating means and method
Assignee: EDWARD W SMITH
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Filing: 1969-09-24
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Granted: 1971-11-02
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Expires: 1989-09-24
Abstract
Abstract An apparatus for filtering and concentrating liquid slurries and the like is provided comprising a container having encircling filter screen mounted about an axis in a container for torsional oscillation about the axis. Means are provided for torsionally oscillating the screen with respect to the container whereby liquid is removed from a liquid particle mass in the container after it passes through the screen and the particles remain in the mass with little or no tendencies to clog the screen. The method of this invention comprises establishing a shearing action between the screen and the liquid particle mass, setting up a first liquid flow into the screen and a second pulsating liquid flow out of the screen with the second flow having predetermined peak magnitudes greater than the first flow whereby particles in the liquid mass remain in the mass and the liquid passes through the screen and is filtered.
Inventors
- 👤 Edward W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/01; B01D33/03; B01D33/0307; B01D33/0315; B01D33/29; B01D33/44; B01D33/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
A filtering and concentrating apparatus in accordance with claim 1 wherein said screen is cylindrical.
Claim 2
Dependent Claim
50 words
A filtering and concentrating apparatus in accordance with claim 2 wherein said screen is mounted on a torque tube, means in said torque for withdrawing liquid passed through said screen from said container, said vane means comprising a plurality of vanes extending radially inwardly from said screen toward said axis.
Claim 3
Dependent Claim
16 words
A filtering and concentrating apparatus in accordance with claim 3 wherein said axis is substantially horizontal.
Claim 4
Dependent Claim
39 words
A filtering and concentrating apparatus in accordance with claim 4 wherein said container defines means for passing a liquid and particle mixture into said container and means for draining said mixture from said container independently of said filtering screen.
Claim 5
Independent Claim
113 words
A method of filtering and concentrating comprising, establishing a mass of a liquid carrying particles to be filtered therefrom, torsionally oscillating a tubular filter screen having inwardly extending vanes, in said liquid to set up a shearing action between said screen and said liquid, and setting up a first liquid flow into said screen and a second liquid flow out of said screen with said second flow being of less magnitude than said first flow and having peak magnitudes greater than said first flow, said first flow being directed to an outlet means whereby particles in said liquid remain in said mass and said liquid passes through said screen and is filtered thereby.
Claim 6
Independent Claim
104 words
A method of filtering and concentrating comprising, establishing a mass of liquid-carrying particles to be filtered therefrom, providing a tubular filter screen in said liquid with said screen having inwardly extending vanes, establishing a shearing action between said screen and said liquid, and setting up a first liquid flow into said screen and a second pulsating liquid flow out of said screen with said second flow having peak magnitudes greater than said first flow, said first flow being directed to an outlet means whereby particles in said liquid mass remain in said mass and said liquid passes through said screen and is filtered thereby.
Claim 7
Dependent Claim
42 words
A filtering and concentrating apparatus in accordance with claim 3 and further comprising, end plates extending between said torque tube and said screen, said torque defining at least one opening to enable removal of liquid through the interior of said torque tube.
Claim 8
Dependent Claim
47 words
A filtering and concentrating apparatus in accordance with claim 8 and further comprising a plurality of support members intermediate said screen and said tube for supporting said screen, said vanes being uniformly spaced about the circumference of said cylindrical filtering screen and extending between said end plates.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |