US3830178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semisubmerged ship with hull extensions
Assignee: United States Department of the Navy
•
Filing: 1973-04-26
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Granted: 1974-08-20
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Expires: 1993-04-26
Abstract
Abstract An improvement for the semisubmerged ship provides hull extensions for additional buoyancy or increased cargo and fuel storage which do not appreciably create more drag. In one configuration sacks disposed below the level of surface wave action are inflated to permit shallow water operation. Preferably, however, the hull extensions have a meniscoidal cross-sectional configuration and are mounted on the submerged hulls. Particularly in the case of the meniscoidal-shaped extensions, the structural integrity of the semisubmerged ship is not compromised and the ship''s capability for high-speed operation remains substantially unimpaired since the hull extensions do not appreciably create excessive drag. Whatever configuration is chosen, the hull extensions are either permanently or releasably coupled to the hulls to allow flexibility in range and payload.
Inventors
- 👤 T Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:58
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/10; B63B1/107; B63B1/12; B63B2001/128; B63B43/00; B63B43/02; B63B43/10; B63B43/14; B63B2043/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
In a semisubmerged ship having at least one hull disposed beneath the water''s surface, a platform carried above the water''s surface, and at least one water-surface piercing strut member, interconnecting the hull and platform, an improvement therefor is provided comprising: a pair of means for increasing the volume displaced by said semisubmerged ship each disposed on opposite sides of said hull and having a rigid meniscoidal cross-sectional configuration with its inner contour shaped to accommodate said hull and its outer contour shaped to reduce the problems associated with drag, a first one of the increasing means has at least one compartment for buoyancy and storage and a second one of the increasing means is filled with a rigid buoying material for buoyancy and protection of the hull and both of the increasing means cooperate to give the composite structure created thereby an elliptical cross-sectional appearance, and; means for removeably mounting both increasing means beneath the water''s surface on said hull to give said semisubmerged ship a variable displacement.
Claim 2
Dependent Claim
168 words
In a semisubmerged ship having at least one hull disposed beneath the water''s surface, a platform carried above the water''s surface, and at least one water-surface piercing strut member, interconnecting the hull and platform, an improvement therefor is provided comprising: a pair of means for increasing the volume displaced by said semisubmerged ship each disposed on opposite sides of said hull and having a rigid meniscoidal cross-sectional configuration with its inner contour shaped to accommodate said hull and its outer contour shaped to reduce the problems associated with drag, a first one of the increasing means has at least one compartment for buoyancy and storage and a second one of the increasing means is filled with a rigid buoying material for buoyancy and protection of the hull and both of the increasing means cooperate to give the composite structure created thereby an elliptical cross-sectional appearance, and; means for removeably mounting both increasing means beneath the water''s surface on said hull to give said semisubmerged ship a variable displacement.
Claim 3
Dependent Claim
30 words
An improvement according to claim 1 in which at least one of the increasing means extends nearly the full length of said hull for providing increased buoyancy and protection thereto.
Claim 4
Dependent Claim
25 words
An improvement according to claim 1 in which at least one of the increasing means extends only a fraction of the length of said hull.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |