US3885514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement relating to ship hulls
Assignee: LAUENBORG JAN T
•
Filing: 1973-07-31
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Granted: 1975-05-27
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Expires: 1993-07-31
Abstract
Abstract A modification of a trimaran hull for improving the stability thereof in which the middle hull extends to a depth below that of the side hulls, the lower part of the middle hull having a rounded bow, and being considerably shorter in length than the side hulls and terminating forwards of the aft end of the side hulls.
Inventors
- 👤 Jan Tronje Lauenborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/10; B63B1/12; B63B43/00; B63B43/02; B63B43/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
A ship''s hull having a bow, stern, bottom and lateral sides and including two depending side portions which are spaced in opposition to one another and have free lower edges, said side portions defining at said bottom, a central longitudinal channel extending from the stern towards the bow, and a central portion disposed in said channel at the front thereof and including a downwardly projecting portion extending at a level beneath the free lower edges of said side portions and of substantially shorter length than the overall length of the hull, said downwardly projecting portion being disposed substantially in entirety below said free lower edges of the side portions and constituted as a horizontally extended torpedo-like body.
Claim 2
Dependent Claim
117 words
A ship''s hull having a bow, stern, bottom and lateral sides and including two depending side portions which are spaced in opposition to one another and have free lower edges, said side portions defining at said bottom, a central longitudinal channel extending from the stern towards the bow, and a central portion disposed in said channel at the front thereof and including a downwardly projecting portion extending at a level beneath the free lower edges of said side portions and of substantially shorter length than the overall length of the hull, said downwardly projecting portion being disposed substantially in entirety below said free lower edges of the side portions and constituted as a horizontally extended torpedo-like body.
Claim 3
Dependent Claim
23 words
A ship''s hull as claimed in claim 1 wherein said torpedo-like body extends beneath the bow of the hull in spaced relation therefrom.
Claim 4
Dependent Claim
26 words
A ship''s hull as claimed in claim 1 wherein said torpedo-like body includes a front bulb portion which extends forwardly in spaced relation beneath the bow.
Claim 5
Dependent Claim
20 words
A ship''s hull as claimed in claim 1 comprising means dividing said torpedo-like body into a plurality of tank sections.
References Cited (Backward Citations)
US911806A
Cited
US2371478A
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US2757629A
Cited
US2815730A
Cited
US3177836A
Cited
US3138130A
Cited
US3239856A
Cited
US3469557A
Cited
US3503358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |