DE3006616A1 - BOAT HULL - Google Patents

Description

Leslie Norman Matthews, 9 Boscombe Avenue, City Beach, Western Australia, Australia

Boat hull

The invention relates to a boat hull. In the case of conventional ship types, one differentiates between those with a single, rigid hull ("single hull" types) or those with two or three hulls ("multi-hull" types). The hull of a "single hull "Ship, for example, may have a deep, V-shaped cross-section that penetrates deep into the water and on the one hand causes a relatively stable, smooth journey of the ship, but on the other hand is associated with relatively high fuel costs. Also, a "single-hull" type of ship can have a relatively wide, flat hull that has low fuel costs brings with it, but also causes a restless journey of the ship.

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Bremen / Bremen Office: Postfach / P. O. Box 10 7127 HoUerallee 32, D-2800 Bremen Telephone: (0421) »349071 Facsimile / Telecopier: Rank Xerox Telegr. / Cables: Diagram Bremen Telex: 244 958 bopatd

130037/0 0 90

Accounts Bremen:

Bremer Bank, Bremen

(Sort code 290 800 10) 100 144 900

Deutsche Bank, Bremen

(Sort code 290 700 50) 1112002

PSchA Hamburg

(BLZ 200 100 20) 1260 83-202

Munich Office: Postfach / P. O. Box 14 01 08 SchJotthauerstraße 3, D-8000 Munich 5 Telephone: (089) 65 23 21 Telecop./Telecop .: (089) 2215 69 R X. 400 Telegr. / Cables: Telepatent Munich Telex: 523937 jus d (code: forbo)

BOfiHMERT & BOEHMERT-

"Multi-hull" ship types have the advantages of an improved Lateral stability compared to "single hull" types, as well as one reduced water contact area. Their disadvantages are the greater expense compared to a "single hull" ship the same load-bearing capacity, as well as their tendency to submerge their bow in waves or in motion.

The invention is therefore based on the object of some such disadvantageous properties of conventional "single hull" - or "multi-hull" ship types.

According to the invention this object is achieved by a boat hull, which is characterized by a pair of essentially Hull sections running parallel in the longitudinal direction from bow to stern through a deck at a distance; a middle intermediate section, which extends from the bow area of the fuselage in the direction of the stern over a substantial part of the distance between the parallel trunk sections to the rear extends; a gas-filled expandable chamber located between the intermediate intermediate section and the deck, and means for expanding and contracting the expandable chamber such that the intermediate portion passes through the expanding or contracting of the expandable chamber can be raised or lowered.

The aim of the present invention is to provide a boat hull develop, the one extending in the longitudinal direction, relatively to the rest of the trunk movable trunk section, as well as an expandable chamber, which extends between the trunk section and the Rest of the fuselage is located. This design overcomes many of the disadvantages of conventional "single hull" and "multi-hull" Ships. Preferred embodiments of the invention enjoy the low fuel consumption of "multi-hull" ships or flat "single-hull" ships, avoid

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but both the restless voyage of flat "single hull" ships or the inclination of "multi <-hull" ships Dipping waves with the bow deep. These preferred embodiments of the invention also have the advantage that their trunk can be brought into a relatively flat shape. Likewise, this ability can change the shape of the boat hull alter can be used to move the ship over land under its own power with the help of a kind of "walking" movement.

The present invention consists of a boat hull having a pair of substantially parallel to each other in the longitudinal direction has hull sections extending from bow to stern, which are connected by a bridge part at a distance, as well as an intermediate section, which extends from the bow area of the The fuselage extends at least part of the way to the stern and a substantial part of the space between the parallel ones Occupying fuselage sections, and one with an expandable Has gas-filled central chamber, which is located between the intermediate section and the bridge and with a device is equipped with which the chamber is expanded and contracted, so that the intermediate body portion accordingly the expansion and contraction is raised or lowered.

The middle chamber is preferably covered with a bag made of elastic Equipped material, which is located between the intermediate fuselage section and the bridge. But it can also other forms of expandable central chamber can be used. Due to the compressibility of the in the gas it contains when the lower edge of the intermediate hull section hits the water surface like a shock absorber works. When sailing, the intermediate section is lowered until the ship has the most favorable gliding properties. After the ship has started to glide, the intermediate hull section can be lifted, whereby the wetted with water

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Area of the ship is reduced. Even in this latter one Arrangement, the middle 'chamber acts like a shock absorber when the boat goes deep enough through a wave.

The device with which the middle chamber is expanded exists preferably from an air blower with which air is forced into the middle chamber at low pressure. The contraction the middle chamber is reached by expelling air with the help of a suitable valve.

The intermediate fuselage portion is preferably attached to the bridge with a parallel movable steering linkage, so that the Intermediate fuselage section can be moved forward and backward as well as up and down. In order to improve this possibility of movement, each arm is movable in parallel Steering linkage provided with a double-acting hydropneumatic piston or other device with which the Arm length can be changed. This latter arrangement also allows the angle that the intermediate body portion with the surface of the water to change. This attribute can not only be used to improve the performance of the ship, but with it the ship can also be used if it is through a Shaft travels, be held as a whole in a stable, horizontal position. This advantage can be used for smaller ships can be achieved in that a plurality of central chambers one behind the other over the length of the intermediate fuselage section are attached between the intermediate fuselage section and the bridge, the expansion of which can be changed individually. If the ship a wave goes down, in this way the front one can middle chamber expands and the aft chamber contracts, causing the bow of the ship at that moment is raised relative to the water surface. If the ship is going up a wave, the reverse action will be the attitude keep the ship relatively stable.

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The intermediate section of the fuselage can take any desired external shape, but its cross-section is at least in the Near the bow of the fuselage are substantially V-shaped. In the longitudinal direction, however, the intermediate section has of the fuselage preferably has a stepped shape with at least one rearward-facing and occupying the entire width Step. It is possible, if desired, to provide a tunnel in the intermediate section of the fuselage, which is located in Extends longitudinally and at its front end above the bow part of the intermediate fuselage section and at its rear End opens in a backward step. It is believed that such a tunnel, the air inlet under the middle section of the boat and / or under the part of the bridge that is located behind the middle section of the boat, supported, whereby the introduced air reduces the wetted area of the fuselage and causes aerodynamic lift.

Another embodiment of the invention has a boat hull with a pair of substantially parallel hull sections running lengthways from bow to stern, the are connected to each other by a deck standing at a distance; a central intermediate section that extends below the Deck extends between the parallel hull sections over at least part of the hull length and with the deck through a Parallel linkage is connected, in which the length of each arm is so variable that in the event of an extension of the Arms of the intermediate fuselage section protrudes below the keel line of the fuselage sections when the arms are in a vertical position and at Foreshortening of the arms above the keel line of the trunk sections is retracted; and means for effecting a Longitudinal relative movement between the parallel fuselage sections and the intermediate section when changing the length of the linkage arms.

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Further features and advantages of the invention emerge from the claims and from the following description in which an embodiment is explained in detail with reference to the drawing. It shows:

Fig. 1 is a side elevation of a boat hull according to the invention;

Figure 2 is a side elevation (sectioned) of the fuselage of Figure 1 taken along line 2-2 of Figure 3;

Figure 3 is an inverted plan view of the ship;

Fig. 4 is a side elevation (sectioned), in which the Intermediate section, is raised;

Figure 5 is a side elevation, in section, with the intermediate portion lowered;

6 shows the schematic representation of an expansion

lifting or lifting system that is in a partially raised position;

7 shows the arms fully extended;

Fig. 8 shows the arms above the apex, moving the ship backwards and

Fig. 9 the arms retracted, starting a new cycle.

An embodiment of a boat hull as shown in the drawing shown has an adjustable intermediate section 11 interposed between the port and starboard hull sections 13 and 15 respectively. The bow 17 of the ship is with suitable inlets fitted, absorbed through the air ■ can be, which is passed through the pipe 20 and from one or more transverse steps 19 below the Fuselage is let out. This expulsion of air causes the ship to lift aerodynamically and reduces the Water resistance. The adjustable intermediate section '' 11 can be rotatable between the port hull section 13 and the

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Starboard fuselage section 15 be mounted, the axis of rotation is placed transversely to the longitudinal axis of the ship close to the bow. Alternatively, the adjustable intermediate section 11 can be attached the underside 21 of a fixed upper middle deck 23 can be attached with the aid of extendable arms 25 / as shown in FIGS. 6 to 9 shown. Oer adjustable intermediate section 11 can be moved away from the fixed, high-lying middle deck 23 or towards this, whereby a chamber 27 between the underside 21 of the deck 23 and the inside of the starboard and port hull sections and the adjustable Intermediate section 11 is formed. Sealing parts 29 are provided to seal the expandable chamber 27. Furthermore, facilities are provided (not shown) with their Help the shape and size of the chamber 27 and thus the position of the adjustable .Zwischenabschnitt 11 are controlled.

The chamber 27 is preferably equipped with an elastic membrane.

As shown in FIGS. 6 to 9, the adjustable intermediate section 11 is on the underside in the illustrated embodiment a fixed, high-lying middle deck 23 with the aid of extendable arms 25 attached. The extendable arms can e.g. B. be hydropneumatic pistons and are attached to both the bow 17 and the stern 31 of the ship. the Arms 25 are rotatably mounted so that they are on a predetermined arc, which is defined by a suitable steering linkage. turn. The arms must be of sufficient stability in order that the adjustable intermediate section 11 is completely lowered to be able to carry the ship (see Fig. 7). The expandable chamber mentioned above can be used to assist in lifting the ship.

When sailing in deep water, the adjustable intermediate section becomes

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11 brought into a raised position so that the ship like a "multi-hull" type floats. If desired, can Air can be forced into the chamber 27 so that the intermediate section 11 is lowered into the desired position will. Since the adjustable. Intermediate section and the chamber 27 act like a shock absorber, every pitching movement of the Ship dampened, which enables a more comfortable journey for the occupants. The ship travels in shallow water or if there are obstacles in the water, a ship with a shallow draft is desirable. According to the invention in this Fall air is pressed into the chamber 27 until the adjustable intermediate section 11 is lowered so deep that it is the keel line of the adjacent Reached trunk sections 13 and 15. This will the ship from a "Multi ■ * -Hull!" - type into one with a relative transformed flat ground. The buoyancy that carries the cargo is generated over a larger area. the Control of the air in chamber 27 can be achieved by pressure generators (not shown) or similar devices. Also, if so desired, the chamber 27 can be extended with Arms 25 be equipped, whereby the leadership of the adjustable. Intermediate section 11 can be supported.

If a ship with the extendable arms 25 as it is in the 6 to 9, it is possible to "walk" in and out of the water with the ship. To one of those To perform movement, the ship will be adjustable after the. Intermediate section 11 is lowered into shallow water brought. If the ship touches down on the beach, the arms 25 are as shown in FIGS. 6 and 7, so far extended until the adjustable vase section 11 den Touches the bottom and the starboard and port hull sections 13 and 15 are raised. Each of the extendable arms 25 is rotatably mounted and is guided by a steering linkage 33. If the arms 25 are moved beyond the apex

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expands, the ship will move backwards as shown in FIG. Thereafter, the adjustable intermediate section 11 and the starboard and port sections 13 and 15 in contact with the ground. The extendable arms 25 are then pulled together again and the ship is able to take another "step" to run backwards. By appropriately changing the steering linkage 33, the ship can also be put into the position will be to "go forward".

In a preferred embodiment of the invention, the chamber 27 is filled with air, whereby the movement of the .einstellbaren Intermediate section .. 11 is supported. The air between the fixed deck 23 and the adjustable intermediate section 11 relieves the extendable arms 25.

Another advantage according to the invention is the possibility of being able to lower the ship into the water on beaches where no ramp is available. It is also possible, with the ship over reefs to "go" _f or to free it after a stranding.

The features of the invention disclosed in the above description and in the claims can be used individually as also essential in any combination for the implementation of the invention in its various embodiments be.

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BCEHMERT & BOEHMERT

File: MX 1618

. REFERENCE CHARACTER LIST (LIST OP RSPERENCE NUMERALS)

1 1 ? P. 5 4th 4th 5 6th 6th 7th 7th 8th 8th 9 9 10 10 11 intermediate section (of the fuselage) 11 12th 12th 13 Port - hull section 15th 14th 14th 15 Starboard hull section 15th 16 16 17 bug 17th 18th 18th 19 stage 19th 20 tube 20th 21 bottom (of 23) 21st 22nd 22nd 25 Fixed, high middle deck (or bridge) 25th 24 24 25 arms 25th 26th 27 chamber 27 28 28 29 sealing parts 29 30th 50

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31 Rear 31 32 32 33 Steering linkage 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 4? 43 44 44 4? 45 46 46 47 47 48 48 49 49 ^ o 50 51 ? 2 52 ? 3 53 ^ 4 54 ?? 55 56 ? 7 57 ^ ⁸ 58 ? 9 59 60 60 61 61 62 62 6? 63 64 64 6? 65

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Claims (10)

BpEHMEHT ^ JJuE MX 1618 claims 1. A boat hull, characterized by a pair of substantially parallel in the longitudinal direction from bow to stern extending by a deck (23) at a distance connected hull sections (13 _# 15); a central intermediate section (11) extending rearwardly from the bow region (17) of the hull towards the stern (31) over a substantial part of the distance between the parallel hull sections; a gas-filled expandable chamber (27) located between the central intermediate section (11) and the deck (23); and means for expanding and contracting the expandable chamber such that the intermediate portion (11) can be raised or lowered by the expansion and contraction of the expandable chamber (27). 2. Boat hull according to claim 1, characterized in that the chamber (27) has a bag made of elastic material. 130037/0090 3 .. boat hull according to claim 1 or 2, characterized in that the device for expanding the chamber (27) is an air blower for forcing air under low pressure into the chamber (27). 4. Boat hull according to one of claims 1 to 3, characterized in that that the intermediate section (11) is connected to the deck (23) by a steering linkage (33), which has a parallel movement enables. 5. boat hull according to claim 4, characterized in that each arm of the steering linkage has a device for changing having its length. 6. boat hull according to claim 5, characterized in that each arm of the steering linkage has a hydropneumatisehen piston having. 7. Boat hull according to one of the preceding claims, characterized in that a plurality of chambers (27) one behind the other is arranged over the intermediate section (11) and the Expansion and contraction of each chamber independently of that of the other chambers controllable. 8. Boat hull according to one of the preceding claims, characterized in that the underside of the intermediate section (11) is provided over its entire length with a transverse, rearward-facing step. 9. boat hull according to claim 8, characterized in that the Intermediate section (11) is provided with a tube (20) which, extending in the longitudinal direction of the intermediate section (11), at one end adjacent to the bow of the intermediate section (11) above the waterline and / or at the other / OQ90 BQEHMERT & BOEKMERT End to the backward-facing step (19) is open. 10. Boat hull, characterized by a pair of essentially parallel hull sections (13, 15) running in the longitudinal direction from the bow to the stern, which are spaced apart by a deck (23) are connected to each other in a standing position; a central intermediate section (11) extending below the deck between the parallel hull sections extending over at least part of the hull length and with the deck (23) by a parallel linkage (33) is connected, in which the length of each arm is so variable that in the event of an extension the arms of the intermediate section (11) in the vertical position the arms protrude below the keel line of the trunk sections (13, 15) and when the arms are shortened above the keel line, the fuselage sections (13, 15) are retracted; and a device for causing a longitudinal relative movement between the parallel fuselage sections and the intermediate section at Changing the length of the rod arms. - 3 "· 130037/0090