Patent US3738307A successfully refreshed from Google Patents.
US3738307A
Expired / Lapsed
US
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Propeller nozzle
Assignee: STROMMEN STRAAL STROMMEN RAUFO
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Filing: 1971-06-03
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Granted: 1973-06-12
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Expires: 1991-06-03
Abstract
Abstract A propeller nozzle is provided in which the geometry of the nozzle profile varies. With such a propeller nozzle, the hull stream in the propeller zone can be changed to a field of a more rotationally symmetrical nature.
Inventors
- 👤 G Jacobsen
- 👤 A Mollevik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/07; B63H5/16; B63H5/14; B64; B64C; B64C11/00; B64C11/001
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
A nozzle for a propeller for improving propulsion efficiency, comprising a body provided with a varying profile, the improvement being that the body includes sectors, each sector having a constant profile and a stepwise transition between the sectors.
Claim 2
Dependent Claim
38 words
A nozzle for a propeller for improving propulsion efficiency, comprising a body provided with a varying profile, the improvement being that the body includes sectors, each sector having a constant profile and a stepwise transition between the sectors.
Claim 3
Dependent Claim
32 words
The propeller nozzle as claimed in claim 1 in which the body has a propeller zone, and the inside of the body behind the propeller zone is common for all the profiles.
References Cited (Backward Citations)
US3455268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |