US3220340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dewatering liquid-containing material composition, preferably fibrous pulp suspensions
Assignee: A Ekstroms Maskinaffar AB
•
Filing: 1963-09-27
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Granted: 1965-11-30
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Expires: 1983-09-27
Abstract
No abstract record available.
Inventors
- 👤 Frykhult Rune Helmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:40
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/20; B30B9/207; B01; B01D; B01D33/00; B01D33/06; B01D33/067; B01D33/073; B01D33/11; B01D33/35; B01D33/37; B01D33/44; B01D33/46; B01D33/466; B01D33/48; B01D33/50; B01D33/58; B01D33/60; B01D33/62; B01D33/64; B01D33/70; B01D33/76; D; D21; D21F; D21F1/00; D21F1/66; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
AN APPARATUS FOR HIGH-DEGREE DEWATERING OF HYDROUS SUBSTANCES SUCH AS FIBER PULP SUSPENSIONS, SAID APPARATUS COMPRISING AN INNER ROTARY SCREEN DRUM, AN OUTER ROTARY SCREEN DRUM, SAID INNER DRUM BEING DISPOSED ECCENTRICALLY WITHIN SAID OUTER DRUM, SAID DRUMS HAVING SUBSTANTIALLY PARALLEL AXES AND DEFINING BETWEEN THEM A NIP, MEANS FOR URGING SAID OUTER DRUM TOWARD SAID INNER DRUM ALONG SAID NIP, MEANS FOR SUPPLYING A HYDROUS SUBSTANCE INTO SAID OUTER DRUM, ROTATION OF SAID DRUMS SERVING TO FEED SAID SUBSTANCES BETWEEN SAID DRUMS SERVING TO FEED PRESS SAID SUBSTANCE AND REMOVE WATER THEREFROM, MEANS FOR REMOVING THE DEWATERED SUBSTANCE AND THE WATER REMOVED THEREFROM, SAID OUTER DRUM COMPRISING A THIN SCREEN CASING AND STIFFENING MEANS ON THE OUTER SURFACE OF SAID CASING, AT LEAST CERTAIN PORTIONS OF SAID STIFFENING MEANS ADJACENT THE SURFACE OF SAID CASING EXTENDING SUBSTANTIALLY CIRCUMFERENTIALLY THEREOF, RADIALLY EXTENDING SEALING FLANGE MEANS ON EACH END OF SAID INNER DRUM, AND AXIALLY SPACED SEALING SURFACES ON EACH END OF SAID OUTER DRUM, SAID FLANGE MEANS OVERLAPPING SAID SEALING SURFACES TO PROVDE A SEAL BETWEEN SAID DRUMS.
Claim 2
Independent Claim
178 words
AN APPARATUS FOR HIGH-DEGREE DEWATERING OF HYDROUS SUBSTANCES SUCH AS FIBER PULP SUSPENSIONS, SAID APPARATUS COMPRISING AN INNER ROTARY SCREEN DRUM, AN OUTER ROTARY SCREEN DRUM, SAID INNER DRUM BEING DISPOSED ECCENTRICALLY WITHIN SAID OUTER DRUM, SAID DRUMS HAVING SUBSTANTIALLY PARALLEL AXES AND DEFINING BETWEEN THEM A NIP, MEANS FOR URGING SAID OUTER DRUM TOWARD SAID INNER DRUM ALONG SAID NIP, MEANS FOR SUPPLYING A HYDROUS SUBSTANCE INTO SAID OUTER DRUM, ROTATION OF SAID DRUMS SERVING TO FEED SAID SUBSTANCES BETWEEN SAID DRUMS SERVING TO FEED PRESS SAID SUBSTANCE AND REMOVE WATER THEREFROM, MEANS FOR REMOVING THE DEWATERED SUBSTANCE AND THE WATER REMOVED THEREFROM, SAID OUTER DRUM COMPRISING A THIN SCREEN CASING AND STIFFENING MEANS ON THE OUTER SURFACE OF SAID CASING, AT LEAST CERTAIN PORTIONS OF SAID STIFFENING MEANS ADJACENT THE SURFACE OF SAID CASING EXTENDING SUBSTANTIALLY CIRCUMFERENTIALLY THEREOF, RADIALLY EXTENDING SEALING FLANGE MEANS ON EACH END OF SAID INNER DRUM, AND AXIALLY SPACED SEALING SURFACES ON EACH END OF SAID OUTER DRUM, SAID FLANGE MEANS OVERLAPPING SAID SEALING SURFACES TO PROVDE A SEAL BETWEEN SAID DRUMS.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |