US3554665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow through propeller
Assignee: Michigan Wheel Corp
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Filing: 1969-06-24
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Granted: 1971-01-12
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Expires: 1989-06-24
Abstract
Abstract A FLOW THROUGH MARINE PROPELLER UNIT WITH UNIQUE EXHAUST CREEPAGE BARRIER STRUCTURE TO PREVENT CAVITATION AT THE BLADES, SUCH UNIT HAVING THE EXHAUST BARRIER PROTUBERANCE BETWEEN THE REARWARD END OF THE HUB AND THE BLADES TO PREVENT FORWARD CREEPAGE OF EXHAUST GASES, BY CREATING A STAGNANT WATER ZONE AHEAD OF THE FRONT FACE OF THE PROTUBERANCE AND A SHEARING WATER FLOW ACTION AT THE PROTUBERANCE PERIPHERY. THE ANGLE OF THE PROTUBERANCE FRONT FACE TO THE HUB PERIPHERY, AND MORE SPECIFICALLY TO THE AXIS OF THE UNIT, SHOULD BE 90* OR LESS IN A FORWARD DIRECTION WITH RESPECT TO THE DIRECTION OF MOVEMENT OF THE UNIT IN OPERATION.
Inventors
- 👤 Eldon L Lorenz
- 👤 Robert F Kress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:08
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/24; B63H20/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |