Ships – Mother ship – floating landing platform – and harbor – Aircraft
Patent
1993-07-26
1994-11-29
Basinger, Sherman
Ships
Mother ship, floating landing platform, and harbor
Aircraft
114 85, B63B 3550
Patent
active
053679733
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a helicopter deck for a ship, having a greater transverse extension than the breadth of the ship.
If a helicopter deck is to be mounted on a ship, it may often be necessary for said deck to have a greater transverse extension than the breadth of the ship. This may be either be because a very large helicopter deck is required for various reasons, or because the ship that is to support the helicopter deck is relatively narrow.
2. Prior Art
Helicopter decks have been built on smaller vessels where the sides of the deck have extended beyond the sides of the ship. This is in many ways an unfavorable solution. First, the projecting parts of the helicopter deck would be in the way when the ship is to come along quay, and the wide design would have an unfavorable effect on the stability of the ship, and would be exposed to snow, ice and wind.
From U.S. Pat. No. 4,665,857 there is known a helicopter deck for a ship that consists of a deck section that may be raised and lowered, which section in raised position forms a central part of a helicopter deck that has been expanded on both sides with horizontally movable deck sections. The central deck section may be lowered, e.g., with a helicopter standing thereon, and the horizontally movable deck sections are moved inward over the central deck section, thus forming a type of hangar for the helicopter. This is obviously a very expensive and complicated solution, although it may seem elegant.
There are also known other simpler solutions for expandable decks wherein expanding deck sections are hinged to the longitudinal sides of a central deck. Such an arrangement is also complicated in that it requires very solid hinges and complicated pivot devices for the expanding deck sections.
OBJECT AND SUMMARY OF THE INVENTION
The intention of the present invention is to provide a helicopter deck for a ship, having a greater transverse extension than the breadth of the ship and having a simple, inexpensive and sturdy design, thus eliminating the previous disadvantages.
This is achieved according to the invention by a helicopter deck that is characterized by a level, horizontal deck section attached to the ship, the longitudinal edges of which lie entirely or almost entirely within the outer confines of the ship, that there is disposed along at least one of the longitudinal edges of the level, horizontal and permanent deck section a sheet-like deck section which at one longitudinal edge is tightly joined to a longitudinal edge on the permanent deck section, that the outer, free edge of the sheet-like deck section projects substantially beyond the side of the ship, that the sheet-like deck section may be raised to a position above the permanent deck section and in this raised position is rotatable about an approximately vertical axis, and that the center of rotation is located such that the sheet-like deck section in its rotated position is situated within or approximately within the sides of the ship.
The advantage of the design according to the invention is that it is simple, inexpensive and sturdy and, most importantly, reliable. For rearrangement of the movable deck sections there may be used standard elements such as crane pillars and a toothed flywheel rim driven by a standard motor with gear wheels. In operative position the movable deck sections rest against permanent supports on the ship in addition to the crane pillars. In a simple manner, one can ensure that the movable deck sections in their stowed position are situated within the outer confines of the ship, whereas with a simple raising and rotation they expand the deck substantially in the transverse direction of the ship.
Whether one uses a rotatable deck section on two sides of the deck or on only one side is determined according to need and the breadth of the ship.
In the following the invention will be explained further with reference to the drawings, which show an embodiment form of the invention.
BRIEF DESCRIPTION OF THE DRAWING
REFERENCES:
patent: 2329941 (1943-09-01), Posin
patent: 3516375 (1970-06-01), Charlton
patent: 3785316 (1974-01-01), Leming et al.
patent: 4665857 (1987-05-01), Akerman et al.
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