US3170284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw propeller propulsion devices
Assignee: Individual
•
Filing: 1963-07-30
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Granted: 1965-02-23
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Expires: 1983-07-30
Abstract
No abstract record available.
Inventors
- 👤 Monnich Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/001; B63; B63H; B63H5/00; B63H5/07; B63H5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A SCREW PROPELLER PROPULSION DEVICE, COMPRISING A SCREW PROPELLER FOR DRIVING A CRAFT IN A FORWARD DIRECTION, A GUIDE RING HAVING FRONT AND REAR ENDS SURROUNDING THE PROPELLER AND EXTENDING IN A DIRECTION OPPOSITE TO THE DIRECTION OF PROPULSION, INNER AND OUTER WALLS ON SAID GUIDE RING FORMING A DUCTWAY THEREBETWEEN, SAID INNER WALL BEING PROVIDED WITH AN INLET OPENING ADJACENT THE FRONT END OF SAID GUIDE RING AND IN COMMUNICATION WITH THE INTERIOR OF SAID RING, SAID SCREW PROPELLER BEING DISPOSED IN SAID GUIDE RING WITH ITS PERIPHERAL EDGES ADJACENT SAID INLET OPENING AND DISPOSED FORWARDLY THEREOF, SAID DUCTWAY BEING PROVIDED WITH AN OUTLET ADJACENT THE REAR END OF SAID GUIDE RING.
Claim 2
Dependent Claim
114 words
IN A SCREW PROPELLER PROPULSION DEVICE, COMPRISING A SCREW PROPELLER FOR DRIVING A CRAFT IN A FORWARD DIRECTION, A GUIDE RING HAVING FRONT AND REAR ENDS SURROUNDING THE PROPELLER AND EXTENDING IN A DIRECTION OPPOSITE TO THE DIRECTION OF PROPULSION, INNER AND OUTER WALLS ON SAID GUIDE RING FORMING A DUCTWAY THEREBETWEEN, SAID INNER WALL BEING PROVIDED WITH AN INLET OPENING ADJACENT THE FRONT END OF SAID GUIDE RING AND IN COMMUNICATION WITH THE INTERIOR OF SAID RING, SAID SCREW PROPELLER BEING DISPOSED IN SAID GUIDE RING WITH ITS PERIPHERAL EDGES ADJACENT SAID INLET OPENING AND DISPOSED FORWARDLY THEREOF, SAID DUCTWAY BEING PROVIDED WITH AN OUTLET ADJACENT THE REAR END OF SAID GUIDE RING.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |