US3246698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser-pump for marine propulsion propeller hub exhaust
Assignee: Kiekhaefer Corp
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Filing: 1965-03-08
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Granted: 1966-04-19
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Kiekhaefer Elmer Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:13
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/24; B63H20/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A MARINE PROPULSION DEVICE HAVING A ROTATABLE PROPELLER SHAFT AND A GENERALLY CYLINDRICAL HOLLOW PROPELLER HUB MOUNTED ON SAID SHAFT, MEANS FOR DISCHARGING WATER REARWARDLY FROM WITHIN SAID HUB, SAID MEANS COMPRISING: (A) RADIALLY EXTENDING CENTRIFUGAL PUMP MEANS CONNECTED FOR ROTATION WITH SAID SHAFT AND DISPOSED REARWARDLY OF THE DISCHARGE OPENING OF SAID HUB, (B) SAID PUMP MEANS INCLUDING AN OUTWARDLY FLARED DIFFUSER CONNECTED TO SAID PUMP MEANS REARWARDLY OF SAID DISCHARGE OPENING.
Claim 2
Dependent Claim
74 words
IN A MARINE PROPULSION DEVICE HAVING A ROTATABLE PROPELLER SHAFT AND A GENERALLY CYLINDRICAL HOLLOW PROPELLER HUB MOUNTED ON SAID SHAFT, MEANS FOR DISCHARGING WATER REARWARDLY FROM WITHIN SAID HUB, SAID MEANS COMPRISING: (A) RADIALLY EXTENDING CENTRIFUGAL PUMP MEANS CONNECTED FOR ROTATION WITH SAID SHAFT AND DISPOSED REARWARDLY OF THE DISCHARGE OPENING OF SAID HUB, (B) SAID PUMP MEANS INCLUDING AN OUTWARDLY FLARED DIFFUSER CONNECTED TO SAID PUMP MEANS REARWARDLY OF SAID DISCHARGE OPENING.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |