US3322277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for filtering a liquid containing cake-forming solids
Assignee: CENTRAL HADLEY CORP
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Filing: 1963-10-29
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Granted: 1967-05-30
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Expires: 1983-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur E Pearson
- 👤 Herbert N Haberstroh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:17
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; B01D33/00; B01D33/15; B01D33/21; B01D33/80; B01D33/801; B01D33/804; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
A METHOD FOR FILTERING A LIQUID WITH CAKE-FORMING SOLIDS SUSPENDED IN IT, THE METHOD COMPRISING DISPOSING A ROTATABLE FILTER LEAF IN THE LIQUID WITH THE SUSPENDED SOLIDS, DISPOSING AN ANTIBRIDGING BAR ACROSS AT LEAST ONE FACE OF THE FILTER LEAF, THE BAR EXTEDNING FROM THE PERIPHERY OF THE LEAF TO A POINT CLOSELY ADJACENT THE AXIS OF ROTATION OF THE LEAF, THE BAR BEING SUBSTANTIALLY PARALLEL TO AND SPACED FROM THE SAID FACE OF THE LEAF A DISTANCE EQUAL TO THE DESIRED THICKNESS OF A FILTER CAKE ON THE FACE AT THE END OF A FILTERING RUN, FORCING LIQQUID INTO THE FILTER LEAF TO BUILD UP A FILTER CAKE ON THE SAID FACE OF THE LEAF, ROTATING THE LEAF RELATIVE TO THE BAR WITH AN ELECTRIC MOTOR WHILE THE LIQUID IS FORCED INTO THE LEAF SO THAT SUBSTANTIALLY ALL OF THE SAID FACE OF THE LEAF SWEEPS PAST THE BAR TO PREVENT THE BUILD UP OF AN UNDISTURBED FILTER CAKE OF A THICKMESS GREATER THAN THE DISTANCE BETWEEN SAID FACE AND THE BAR, AND SENSING THE POWER DELIVERED TO THE MOTOR TO DETERMINE WHEN THE FILTER CAKE IS OF A THICKNESS SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN THE BAR AND THE SAID FACE TO THE LEAF.
Claim 2
Independent Claim
206 words
A METHOD FOR FILTERING A LIQUID WITH CAKE-FORMING SOLIDS SUSPENDED IN IT, THE METHOD COMPRISING DISPOSING A ROTATABLE FILTER LEAF IN THE LIQUID WITH THE SUSPENDED SOLIDS, DISPOSING AN ANTIBRIDGING BAR ACROSS AT LEAST ONE FACE OF THE FILTER LEAF, THE BAR EXTEDNING FROM THE PERIPHERY OF THE LEAF TO A POINT CLOSELY ADJACENT THE AXIS OF ROTATION OF THE LEAF, THE BAR BEING SUBSTANTIALLY PARALLEL TO AND SPACED FROM THE SAID FACE OF THE LEAF A DISTANCE EQUAL TO THE DESIRED THICKNESS OF A FILTER CAKE ON THE FACE AT THE END OF A FILTERING RUN, FORCING LIQQUID INTO THE FILTER LEAF TO BUILD UP A FILTER CAKE ON THE SAID FACE OF THE LEAF, ROTATING THE LEAF RELATIVE TO THE BAR WITH AN ELECTRIC MOTOR WHILE THE LIQUID IS FORCED INTO THE LEAF SO THAT SUBSTANTIALLY ALL OF THE SAID FACE OF THE LEAF SWEEPS PAST THE BAR TO PREVENT THE BUILD UP OF AN UNDISTURBED FILTER CAKE OF A THICKMESS GREATER THAN THE DISTANCE BETWEEN SAID FACE AND THE BAR, AND SENSING THE POWER DELIVERED TO THE MOTOR TO DETERMINE WHEN THE FILTER CAKE IS OF A THICKNESS SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN THE BAR AND THE SAID FACE TO THE LEAF.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |