US3610192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of moving laden ships through shallow draft-limited waters
Assignee: John J Mcmullen Associates Inc
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Filing: 1969-01-31
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Granted: 1971-10-05
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Expires: 1989-01-31
Abstract
Abstract A method of lifting laden ships through shallow draft-limited waters comprising moving a specially constructed buoyant carrier capable of lifting a fully laden ship into position relative to fully laden ship, forming an assemblage by relatively moving the ship into the carrier so that the carrier bottom forms the assemblage bottom, for example, by flooding tanks of the carrier, reducing the draft of the assemblage by pumping water from the flooded carrier tanks until the assemblage draft is less than that of the full laden ship and within the safe draft limits of the waters through which the assemblage is to be moved and moving the assemblage through the shallow draft-limted waters.
Inventors
- 👤 Hans W Mauritzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
B; B63; B63B; B63B43/00; B63B43/02; B63B43/10; B63B43/14; B63B35/00; B63B35/40; B63B35/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
Apparatus for reducing the draft of a laden ship comprising a rigid buoyant structure to receive the laden ship and to elevate the same so that the draft of the ship and buoyant structure together is substantially less than that of the ship alone, the apparatus comprising: first and second buoyancy tank sections; adjustable hinge means intermediate and connecting said first and second buoyancy tank sections; means associated with said first and second buoyancy tank sections for adjusting the relative positions of said first and second buoyancy tank sections so that the surfaces of the respective sections adjacent said laden ship may be made to substantially conform to the shape of said laden ship; and means associated with each of said first and second buoyancy tank sections for maintaining said laden ship secure with respect to said first and second buoyancy tank sections when said laden ship is elevated.
Claim 2
Dependent Claim
149 words
Apparatus for reducing the draft of a laden ship comprising a rigid buoyant structure to receive the laden ship and to elevate the same so that the draft of the ship and buoyant structure together is substantially less than that of the ship alone, the apparatus comprising: first and second buoyancy tank sections; adjustable hinge means intermediate and connecting said first and second buoyancy tank sections; means associated with said first and second buoyancy tank sections for adjusting the relative positions of said first and second buoyancy tank sections so that the surfaces of the respective sections adjacent said laden ship may be made to substantially conform to the shape of said laden ship; and means associated with each of said first and second buoyancy tank sections for maintaining said laden ship secure with respect to said first and second buoyancy tank sections when said laden ship is elevated.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1, wherein the ship is maintained in at least a partially floating condition within the carrier.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 wherein the carrier is open fore and aft and the ship powerplant propels the assemblage.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1 wherein portions of the carrier are forced into intimate contact with the ship.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 1 wherein resilient means are interposed between said structure and said ship.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |