US3306529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal impeller
Assignee: —
•
Filing: —
•
Granted: 1967-02-28
•
Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:04
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F05; F05D; F05D2300/00; F05D2300/40; F05D2300/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A CENTRIFUGAL IMPELLER SUITABLE FOR MOUNTING ON A SHAFT COMPRISING: A UNITARY BLADE ASSEMBLY OF FLEXIBLE MATERIAL AND HAVING A PAIR OF SUBSTANTIALLY PARALLEL FLEXIBLE SIDE MEMBERS AND A PLURALITY OF BLADES EACH CONNECTED BETWEEN SAID SIDE MEMBERS, A HUB FOR CONNECTING SAID BLADE ASSEMBLY TO SAID SHAFT, AND A PLURALITY OF RADIALLY PROJECTING SPOKES SPACED CIRCUMFERENTIALLY NOT LESS THAN 60 DEGREES AND EACH HAVING ONE END DISPOSED ON SAID HUB AND THE OPPOSITE END THEREOF IN ENGAGEMENT WITH SAID BLADE ASSEMBLY, THE ENGAGEMENT OF SAID OPPOSITE SPOKE ENDS WITH SAID BLADE ASSEMBLY THEREBY SERVING AS THE ONLY RADIAL SUPPORT FOR SAID ASSEMBLY, AND THE FLEXIBILITY OF SAID BLADE ASSEMBLY MATERIAL BEING SUCH THAT THE ASSEMBLY OF BLADES IN AN ANNULUS ASSUMES A CIRCULAR FORM ONLY UNDER THE INFLUENCE OF CENTRIFUGAL FORCES RESULTING FROM ROTATION OF THE ASSEMBLY ABOUT THE AXIS OF THE SHAFT.
Claim 2
Dependent Claim
144 words
A CENTRIFUGAL IMPELLER SUITABLE FOR MOUNTING ON A SHAFT COMPRISING: A UNITARY BLADE ASSEMBLY OF FLEXIBLE MATERIAL AND HAVING A PAIR OF SUBSTANTIALLY PARALLEL FLEXIBLE SIDE MEMBERS AND A PLURALITY OF BLADES EACH CONNECTED BETWEEN SAID SIDE MEMBERS, A HUB FOR CONNECTING SAID BLADE ASSEMBLY TO SAID SHAFT, AND A PLURALITY OF RADIALLY PROJECTING SPOKES SPACED CIRCUMFERENTIALLY NOT LESS THAN 60 DEGREES AND EACH HAVING ONE END DISPOSED ON SAID HUB AND THE OPPOSITE END THEREOF IN ENGAGEMENT WITH SAID BLADE ASSEMBLY, THE ENGAGEMENT OF SAID OPPOSITE SPOKE ENDS WITH SAID BLADE ASSEMBLY THEREBY SERVING AS THE ONLY RADIAL SUPPORT FOR SAID ASSEMBLY, AND THE FLEXIBILITY OF SAID BLADE ASSEMBLY MATERIAL BEING SUCH THAT THE ASSEMBLY OF BLADES IN AN ANNULUS ASSUMES A CIRCULAR FORM ONLY UNDER THE INFLUENCE OF CENTRIFUGAL FORCES RESULTING FROM ROTATION OF THE ASSEMBLY ABOUT THE AXIS OF THE SHAFT.
References Cited (Backward Citations)
US2823852A
Cited
US3136035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |