Patent US3077990A successfully refreshed from Google Patents.
US3077990A
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Assignee: Peterson Filters and Engineering Co
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Filing: 1960-03-07
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Granted: 1963-02-19
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Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 John G Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:15
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/044; B01D33/048; B01D33/056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
IN A FILTER MEDIUM TRACKING AND TENSIONING DEVICE FOR A ROTARY DRUM FILTER HAVING A SEPARATE CAKE DISCHARGE SECTION, AN ENDLESS FILTER MEDIUM LOOPED OVER THE FILTER DRUM AND EXTENDING THROUGH THE CAKE DISCHARGE SECTION, WHICH FILTER MEDIUM INCLUDES A BEAD ON EACH EDGE OF THE FILTER MEDIUM EXTENDING COMPLETELY THEREAROUND, AND A FILTER MEDIUM RETURN ROLLER MOUNTED ADJACENT THE FILTER DRUM, THE IMPROVEMENT WHICH COMPRISES MEANS FOR TRACKING THE FILTER MEDIUM BACK TO SAID DRUM INCLUSIVE OF A PAIR OF ROLLERS MOUNTED ADJACENT EACH END OF THE RETURN ROLLER, EACH PAIR OF ROLLERS BEING MOUNTED IN SUBSTANTIAL CONTACTING RELATION AND MOUNTED WITH THE FILTER MEDIUM THEREBETWEEN AND IN POSITION TO BEAR AGAINST THE BEAD AT THE EDGE THEREOF, EACH SAID PAIRS OF ROLLERS BEING ARRANGED TO MOVE LATERALLY IN RESPECT TO THE PATH OF TRAVEL OF THE FILTER MEDIUM, RESILIENT MEANS ATTACHED TO SAID ROLLERS IN POSITION SO THAT THE ROLLERS BEAR AGAINST THE BEAD AT EACH SIDE OF THE FILTER MEDIUM TO STRETCH THE FILTER MEDIUM THEREBETWEEN AND TO CENTER IT IN RELATION TO THE RETURN ROLLER AND THE FILTER DRUM, AND MEANS FOR SUPPORTING EACH PAIR OF SAID ROLLERS IN POSITION ON SAID FILTER MEDIUM AND BIASED AGAINST THE ADJACENT BEAD AT THE EDGE THEREOF.
Claim 2
Dependent Claim
208 words
IN A FILTER MEDIUM TRACKING AND TENSIONING DEVICE FOR A ROTARY DRUM FILTER HAVING A SEPARATE CAKE DISCHARGE SECTION, AN ENDLESS FILTER MEDIUM LOOPED OVER THE FILTER DRUM AND EXTENDING THROUGH THE CAKE DISCHARGE SECTION, WHICH FILTER MEDIUM INCLUDES A BEAD ON EACH EDGE OF THE FILTER MEDIUM EXTENDING COMPLETELY THEREAROUND, AND A FILTER MEDIUM RETURN ROLLER MOUNTED ADJACENT THE FILTER DRUM, THE IMPROVEMENT WHICH COMPRISES MEANS FOR TRACKING THE FILTER MEDIUM BACK TO SAID DRUM INCLUSIVE OF A PAIR OF ROLLERS MOUNTED ADJACENT EACH END OF THE RETURN ROLLER, EACH PAIR OF ROLLERS BEING MOUNTED IN SUBSTANTIAL CONTACTING RELATION AND MOUNTED WITH THE FILTER MEDIUM THEREBETWEEN AND IN POSITION TO BEAR AGAINST THE BEAD AT THE EDGE THEREOF, EACH SAID PAIRS OF ROLLERS BEING ARRANGED TO MOVE LATERALLY IN RESPECT TO THE PATH OF TRAVEL OF THE FILTER MEDIUM, RESILIENT MEANS ATTACHED TO SAID ROLLERS IN POSITION SO THAT THE ROLLERS BEAR AGAINST THE BEAD AT EACH SIDE OF THE FILTER MEDIUM TO STRETCH THE FILTER MEDIUM THEREBETWEEN AND TO CENTER IT IN RELATION TO THE RETURN ROLLER AND THE FILTER DRUM, AND MEANS FOR SUPPORTING EACH PAIR OF SAID ROLLERS IN POSITION ON SAID FILTER MEDIUM AND BIASED AGAINST THE ADJACENT BEAD AT THE EDGE THEREOF.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |