US3279415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller for discharging engine exhaust through the propeller hub
Assignee: Kiekhaefer Corp
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Filing: 1965-02-25
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Granted: 1966-10-18
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Expires: 1985-02-25
Abstract
No abstract record available.
Inventors
- 👤 Kiekhaefer Elmer Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:22
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/24; B63H20/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A REVERSIBLE PROPELLER UNIT FOR AN INTERNAL COMBUSTION ENGINE DRIVEN MARINE PROPULSION DEVICE IN WHICH THE EXHAUST GASES ARE DISCHARGED REARWARDLY THROUGH THE HUB OF THE PROPELLER, COMPRISING: (A) A SLEEVE FOR MOUNTING UPON A DRIVE SHAFT EXTENDING REARWARDLY THROUGH THE EXHAUST DISCHARGE OPENING OF A HOLLOW UNDERWATER UNIT OF THE DEVICE, (B) A HOLLOW HUB CASING CONCENTRIC WITH SAID SLEEVE AND SPACED THEREFROM, (C) A PLURALITY OF SPACED LONGITUDINALLY STRAIGHT GENERALLY RADIAL STRUTS DISPOSED GENERALLY TANGENTIAL TO SAID SLEEVE AND EXTENDING FROM SAID SLEEVE TO SAID CASING, (D) AND PROPELLER BLADES EXTENDING OUTWARDLY FROM SAID CASING, (E) SAID CASING HAVING A CONTINOUSLY REARWARDLY FLARED INNER SURFACE WITH ITS SMALLER END ADAPTED TO BE DISPOSED ADJACENT THE HOUSING EXHAUST OPENING AND WITH ITS LARGER END EXTENDING REARWARDLY OF SAID BLADES.
Claim 2
Dependent Claim
130 words
A REVERSIBLE PROPELLER UNIT FOR AN INTERNAL COMBUSTION ENGINE DRIVEN MARINE PROPULSION DEVICE IN WHICH THE EXHAUST GASES ARE DISCHARGED REARWARDLY THROUGH THE HUB OF THE PROPELLER, COMPRISING: (A) A SLEEVE FOR MOUNTING UPON A DRIVE SHAFT EXTENDING REARWARDLY THROUGH THE EXHAUST DISCHARGE OPENING OF A HOLLOW UNDERWATER UNIT OF THE DEVICE, (B) A HOLLOW HUB CASING CONCENTRIC WITH SAID SLEEVE AND SPACED THEREFROM, (C) A PLURALITY OF SPACED LONGITUDINALLY STRAIGHT GENERALLY RADIAL STRUTS DISPOSED GENERALLY TANGENTIAL TO SAID SLEEVE AND EXTENDING FROM SAID SLEEVE TO SAID CASING, (D) AND PROPELLER BLADES EXTENDING OUTWARDLY FROM SAID CASING, (E) SAID CASING HAVING A CONTINOUSLY REARWARDLY FLARED INNER SURFACE WITH ITS SMALLER END ADAPTED TO BE DISPOSED ADJACENT THE HOUSING EXHAUST OPENING AND WITH ITS LARGER END EXTENDING REARWARDLY OF SAID BLADES.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |