US3149067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening device
Assignee: Bird Machine Co Inc
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Filing: 1962-08-23
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Granted: 1964-09-15
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Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 Cannon Madison Mott
- 👤 Dick George Mckinstry
- 👤 Salomon Salomon Maury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:47
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06; B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/76; B01D29/86; B01D29/88; B01D29/90; B01D29/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
248 words
A DEVICE FOR SEPARATING AQUEOUS SUSPENSIONS CONTAINING PARTICLES OF SOLID MATERIAL INTO A STREAM OF ACCEPTABLE SUSPENSION AND A STREAM OF REJECTED SUSPENSIONS WHICH COMPRISES A VERTICALLY DISPOSED HOUSING, A FIXED CYLINDRICAL SCREEN VERTICALLY DISPOSED WITHIN AND SPACED FROM THE INNER WALL OF SAID HOUSING, A FIXED, IMPERFORATE, GENERALLY CYLINDRICAL WALL MEMBER OF CIRCULAR CROSS-SECTIONAL CONFIGURATION COEXTENSIVE IN LENGTH WITH SAID SCREEN MOUNTED CONCENTRICALLY WITHIN AND SPACED FROM THE SCREEN BY A DISTANCE EQUAL TO 2% TO 20% OF THE DIAMETER OF THE SCREEN AND NO GREATER THAN 3 INCHES FOR A SCREEN 18 INCHES IN DIAMETER AND NO GREATER THAN 5 INCHES FOR A SCREEN 60 INCHES IN DIAMETER TO FORM AN ANNULAR PASSAGEWAY, MEANS FOR INTRODUCING A STREAM OF LIQUID SUSPENSION TO BE SEPARATED AT ONE END OF SAID PASSAGEWAY, MEANS FOR WITHDRAWING REJECTED SUSPENSION FROM THE OTHER END OF SAID PASSAGEWAY, MEANS DISPOSED RADIALLY OUTWARDLY OF SAID SCREEN FOR RECEIVING ACCEPTED SUSPENSION AFTER ITS PASSAGE THROUGH THE SCREEN, AND MEANS EXTENDING INTO SAID PASSAGEWAY FOR CLEARING THE INLET FACE OF THE SCREEN, SAID MEANS FOR INTRODUCING THE STREAM OF LIQUID SUSPENSION TO BE SEPARATED COMPRISING AN INLET FOR INTRODUCING SAID STREAM TANGENTIALLY TO SAID HOUSING WHEREBY THE LIQUID SUSPENSION FLOWS INTO THE SPACE BETWEEN SAID SCREEN AND SAID HOUSING TO SAID ANNULAR PASSAGEWAY AND SAID MEANS FOR WITHDRAWING THE REJECTED SUSPENSION COMPRISING AN OUTLET EXTENDING TANGENTIALLY OUTWARDLY FROM SAID PASSAGEWAY IN THE SAME SENSE AS THE DIRECTION OF TRAVEL OF SAID STREAM IN LIQUID SUSPENSION.
Claim 2
Independent Claim
248 words
A DEVICE FOR SEPARATING AQUEOUS SUSPENSIONS CONTAINING PARTICLES OF SOLID MATERIAL INTO A STREAM OF ACCEPTABLE SUSPENSION AND A STREAM OF REJECTED SUSPENSIONS WHICH COMPRISES A VERTICALLY DISPOSED HOUSING, A FIXED CYLINDRICAL SCREEN VERTICALLY DISPOSED WITHIN AND SPACED FROM THE INNER WALL OF SAID HOUSING, A FIXED, IMPERFORATE, GENERALLY CYLINDRICAL WALL MEMBER OF CIRCULAR CROSS-SECTIONAL CONFIGURATION COEXTENSIVE IN LENGTH WITH SAID SCREEN MOUNTED CONCENTRICALLY WITHIN AND SPACED FROM THE SCREEN BY A DISTANCE EQUAL TO 2% TO 20% OF THE DIAMETER OF THE SCREEN AND NO GREATER THAN 3 INCHES FOR A SCREEN 18 INCHES IN DIAMETER AND NO GREATER THAN 5 INCHES FOR A SCREEN 60 INCHES IN DIAMETER TO FORM AN ANNULAR PASSAGEWAY, MEANS FOR INTRODUCING A STREAM OF LIQUID SUSPENSION TO BE SEPARATED AT ONE END OF SAID PASSAGEWAY, MEANS FOR WITHDRAWING REJECTED SUSPENSION FROM THE OTHER END OF SAID PASSAGEWAY, MEANS DISPOSED RADIALLY OUTWARDLY OF SAID SCREEN FOR RECEIVING ACCEPTED SUSPENSION AFTER ITS PASSAGE THROUGH THE SCREEN, AND MEANS EXTENDING INTO SAID PASSAGEWAY FOR CLEARING THE INLET FACE OF THE SCREEN, SAID MEANS FOR INTRODUCING THE STREAM OF LIQUID SUSPENSION TO BE SEPARATED COMPRISING AN INLET FOR INTRODUCING SAID STREAM TANGENTIALLY TO SAID HOUSING WHEREBY THE LIQUID SUSPENSION FLOWS INTO THE SPACE BETWEEN SAID SCREEN AND SAID HOUSING TO SAID ANNULAR PASSAGEWAY AND SAID MEANS FOR WITHDRAWING THE REJECTED SUSPENSION COMPRISING AN OUTLET EXTENDING TANGENTIALLY OUTWARDLY FROM SAID PASSAGEWAY IN THE SAME SENSE AS THE DIRECTION OF TRAVEL OF SAID STREAM IN LIQUID SUSPENSION.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |