US3303575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping roller
Assignee: Svenska Flaktfabriken AB
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Filing: 1965-03-17
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Granted: 1967-02-14
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Gistren Karl-Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:14
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/16; D; D21; D21F; D21F1/00; D21F1/32; D21F5/00; D21F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A ROTATABLE ROLLER FOR A WEB-LIKE MATERIAL CHARACTERIZED IN THAT THE ROLLER CONSISTS OF AN OUTER ROTOR, OVER WHICH THE WEB-LIKE MATERIAL IS CONDUCTED, AN INNER ROTOR ECCENTRICALLY SUPPORTED IN RELATION TO THE OUTER ROTOR, A NUMBER OF EXTENSIBLE PARTITIONS ARRANGED SUBSTANTIALLY RADIALLY BETWEEN THE OUTER AND THE INNER ROTOR, AND MEANS TO EFFECT ROTATION OF SAID PARTITIONS, SAID PARTITIONS DEFINING PUMPING COMPARTMENTS WHICH ARE EXTENDED AND RETRACTED AS THE ROLLER ROTATES THEREBY PUMPING AIR THROUGH THE WEB-LIKE MATERIAL.
Claim 2
Dependent Claim
79 words
A ROTATABLE ROLLER FOR A WEB-LIKE MATERIAL CHARACTERIZED IN THAT THE ROLLER CONSISTS OF AN OUTER ROTOR, OVER WHICH THE WEB-LIKE MATERIAL IS CONDUCTED, AN INNER ROTOR ECCENTRICALLY SUPPORTED IN RELATION TO THE OUTER ROTOR, A NUMBER OF EXTENSIBLE PARTITIONS ARRANGED SUBSTANTIALLY RADIALLY BETWEEN THE OUTER AND THE INNER ROTOR, AND MEANS TO EFFECT ROTATION OF SAID PARTITIONS, SAID PARTITIONS DEFINING PUMPING COMPARTMENTS WHICH ARE EXTENDED AND RETRACTED AS THE ROLLER ROTATES THEREBY PUMPING AIR THROUGH THE WEB-LIKE MATERIAL.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |