Patent US3326296A successfully refreshed from Google Patents.
US3326296A
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Cycloidal propeller
Assignee: Hovercraft Development Ltd
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Filing: 1966-08-31
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Granted: 1967-06-20
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Hill Roger Brian
- 👤 Nicholas David William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:23
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/043; B60V1/14; B63; B63H; B63H1/00; B63H1/02; B63H1/04; B63H1/06; B63H1/08; B63H1/10; B64; B64C; B64C11/00; B64C11/006; B64C23/00; B64C23/005; B64C39/00; B64C39/003; B64C39/006; Y; Y02; Y02T; Y02T50/00; Y02T50/10; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A CYCLOIDAL PROPELLER FOR OPERATION IN A FLUID MEDIUM COMPRISING AT LEAST ONE BLADE, MEANS FOR CONSTRAINING THE BLADE FOR MOVEMENT IN A CIRCULAR PATH ABOUT A CENTRAL AXIS WITH THE CHORD OF THE BLADE DEFINING WITH A RADIUS FROM THE CENTRAL AXIS TO THE CHORD AN ANGLE WHICH REMAINS CONSTANT THROUGHOUT THE CIRCULAR MOVEMENT OF THE BLADE, AND THE BLADE BEING PROVIDED WITH LIFT REGULATING MEANS OPERABLE TO CAUSE THE RELATIVE SPEEDS OF FLUID MEDIUM PASSING IN OPERATION, OVER THE MAIN FACES OF THE BALDE TO VARY IN A DESIRED MANNER IN ACCORDANCE WITH THE POSITION OF THE BLADE IN THE CIRCULAR PATH WHEREBY THE NET LIFT FORCE AVAILABLE FROM THE BLADE, DURING OPERATION, VARIES IN A DESIRED MANNER IN ACCORDANCE WITH THE POSITION OF THE BLADE IN THE CIRCULAR PATH AND THE PROPELLER PROVIDES A NET PROPULSIVE FORCE IN A DESIRED DIRECTION.
Claim 2
Dependent Claim
144 words
A CYCLOIDAL PROPELLER FOR OPERATION IN A FLUID MEDIUM COMPRISING AT LEAST ONE BLADE, MEANS FOR CONSTRAINING THE BLADE FOR MOVEMENT IN A CIRCULAR PATH ABOUT A CENTRAL AXIS WITH THE CHORD OF THE BLADE DEFINING WITH A RADIUS FROM THE CENTRAL AXIS TO THE CHORD AN ANGLE WHICH REMAINS CONSTANT THROUGHOUT THE CIRCULAR MOVEMENT OF THE BLADE, AND THE BLADE BEING PROVIDED WITH LIFT REGULATING MEANS OPERABLE TO CAUSE THE RELATIVE SPEEDS OF FLUID MEDIUM PASSING IN OPERATION, OVER THE MAIN FACES OF THE BALDE TO VARY IN A DESIRED MANNER IN ACCORDANCE WITH THE POSITION OF THE BLADE IN THE CIRCULAR PATH WHEREBY THE NET LIFT FORCE AVAILABLE FROM THE BLADE, DURING OPERATION, VARIES IN A DESIRED MANNER IN ACCORDANCE WITH THE POSITION OF THE BLADE IN THE CIRCULAR PATH AND THE PROPELLER PROVIDES A NET PROPULSIVE FORCE IN A DESIRED DIRECTION.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |