Patent DE2508201A1 successfully refreshed from Google Patents.
US3323481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming appliances
Assignee: Individual
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Filing: 1965-04-26
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Granted: 1967-06-06
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Ronald A Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:25
CPC Classifications
A; A63; A63B; A63B35/00; A63B35/08; A63B35/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
POWER SWIMMING APPARATUS, COMPRISING A BUOYANT STRUCTURE, HARNESS ATTACHED TO SAID STRUCTURE AND ADAPTED TO DETACHABLY EMBRACE THE USER''S BODY AND MOUNT SAID STRUCTURE ON THE USER''S BACK AS A DORSAL PACK, AN INTERNAL COMBUSTION ENGINE AND FUEL TANK THEREFOR CARRIED BY SAID STRUCTURE, A PROPELLER SHAFT, A PROPELLER SHAFT HOUSING TUBE, MEANS FOR DETACHABLY COUPLING SAID SHAFT TO SAID ENGINE, MEANS FOR DETACHABLY FIXING SAID TUBE TO SAID STRUCTURE, A PROPELLER SECURED TO SAID SHAFT, A SHROUD FIXED TO SAID TUBE AND COMPRISING A SUBSTANTIALLY CIRCULAR CROSS SECTIONED AND AEROFOIL LONGITUDINAL SECTIONED WALL DEFINING A TUBULAR CONVERGENT DUCT, THE COMMON AXIS OF SAID TUBE AND SHAFT BEING INCLINED AT SUCH ANGLE TO THE AXIS OF SAID DUCT THAT THE DIRECTION OF FLOW AT EXIT FROM THE DUCT IS SUBSTANTIALLY HORIZONTAL WHILE THE PROPELLER SHAFT IS INCLINED, SO THAT SAID STRUCTURE AND ENGINE ARE SUBSTANTIALLY FREEBOARD AND THE PROPELLER AND DUCT ARE WHOLLY SUBMERGED.
Claim 2
Dependent Claim
154 words
POWER SWIMMING APPARATUS, COMPRISING A BUOYANT STRUCTURE, HARNESS ATTACHED TO SAID STRUCTURE AND ADAPTED TO DETACHABLY EMBRACE THE USER''S BODY AND MOUNT SAID STRUCTURE ON THE USER''S BACK AS A DORSAL PACK, AN INTERNAL COMBUSTION ENGINE AND FUEL TANK THEREFOR CARRIED BY SAID STRUCTURE, A PROPELLER SHAFT, A PROPELLER SHAFT HOUSING TUBE, MEANS FOR DETACHABLY COUPLING SAID SHAFT TO SAID ENGINE, MEANS FOR DETACHABLY FIXING SAID TUBE TO SAID STRUCTURE, A PROPELLER SECURED TO SAID SHAFT, A SHROUD FIXED TO SAID TUBE AND COMPRISING A SUBSTANTIALLY CIRCULAR CROSS SECTIONED AND AEROFOIL LONGITUDINAL SECTIONED WALL DEFINING A TUBULAR CONVERGENT DUCT, THE COMMON AXIS OF SAID TUBE AND SHAFT BEING INCLINED AT SUCH ANGLE TO THE AXIS OF SAID DUCT THAT THE DIRECTION OF FLOW AT EXIT FROM THE DUCT IS SUBSTANTIALLY HORIZONTAL WHILE THE PROPELLER SHAFT IS INCLINED, SO THAT SAID STRUCTURE AND ENGINE ARE SUBSTANTIALLY FREEBOARD AND THE PROPELLER AND DUCT ARE WHOLLY SUBMERGED.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |