WO2008070309A2 - Navire de logistique avec un pont de charge utile inclinable - Google Patents

Navire de logistique avec un pont de charge utile inclinable Download PDF

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Publication number
WO2008070309A2
WO2008070309A2 PCT/US2007/082072 US2007082072W WO2008070309A2 WO 2008070309 A2 WO2008070309 A2 WO 2008070309A2 US 2007082072 W US2007082072 W US 2007082072W WO 2008070309 A2 WO2008070309 A2 WO 2008070309A2
Authority
WO
WIPO (PCT)
Prior art keywords
deck
ship
hulls
ramp
pivoting
Prior art date
Application number
PCT/US2007/082072
Other languages
English (en)
Other versions
WO2008070309A3 (fr
Inventor
Terrence W. Schmidt
Original Assignee
Navatek, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Navatek, Ltd. filed Critical Navatek, Ltd.
Publication of WO2008070309A2 publication Critical patent/WO2008070309A2/fr
Publication of WO2008070309A3 publication Critical patent/WO2008070309A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/003—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for transporting very large loads, e.g. offshore structure modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/28—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for deck loads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/48—Decks

Definitions

  • the present invention relates to marine vessels having a movable payload deck to allow payload to be moved directly to an adjacent pier or other vessel.
  • U.S. Patent No. 6,877,450 attempts to solve the varying loading height by providing a vertically movable deck, but that structure is unable to contend with the relative motions between the deck and the receiving platforms in a seaway. It also requires massive structure and mechanization to lift the entire deck and cargo weight.
  • Yet another object of the invention is to provide a roll on roll off logistics ship which is relatively simple in operation and inexpensive to maintain.
  • the present invention is directed to a ship having a one or more tiltable decks extending on or parallel to the longitudinal axis of the ship for the purpose of carrying vehicles and other equipment that can be loaded from either end of the ship.
  • the deck In order to accommodate the loading or unloading of vehicles from or to an elevation above or below that of the deck when it is level, the deck is constructed to incline about a pivot near the balance center of the deck with the axis of the pivot being normal to the longitudinal axis of the deck.
  • the slope angle of the pivotable deck is controlled by relatively simple machinery.
  • the payload deck' s weight is balanced about its pivot point on an athwart ships axis located midway between the forward and after ends of the cargo deck.
  • the balanced pivoting deck feature permits adjusting the deck loading height from below the keel to above the top deck with minimal actuation power.
  • the deck is connected to another platform, such as a ship or adjacent pier, it is free to pivot and thereby minimize the relative motion effects.
  • Figure 1 is a perspective view of one embodiment of the present invention.
  • Figure 2 is a side view of the embodiment as shown in FIG. 1;
  • Figure 3 is another side view of the embodiment as shown in FIG. 1 with the payload deck in a different position.
  • Figure 4 is a perspective view of another embodiment of the present invention with its superstructure removed.
  • Figure 5 is a perspective view of the deck structure of the embodiment of Figure 4.
  • Figure 6 is a plan view of the embodiment of Figure 4 with the superstructure removed.
  • Figure 7 is a side view of the embodiment of Figure 4;
  • Figure 8 is an end view of the embodiment of Figure 4;
  • Figure 9a is a sectional view taken along line 9-9 in Figure 4 but including the superstructure and showing the tilting deck connected to the linear stern ramp of an adjacent ship.
  • Figure 9b is a plan view of the arrangement shown in Figure 9a.
  • Figure 10a is a perspective view similar to Figure 4 but showing cross structure connecting the hulls of the ship;
  • Figure 10b is a perspective view similar to Figure 10a but with the pivoting deck removed to reveal the cross connecting foil structures between the hulls;
  • Figure 11 is a perspective view similar to Figure 4 showing the hulls' superstructure in place.
  • Figure 12 is a bottom perspective view of the ship's twin hulls and cross foil structures
  • Figure 13 and 14 are schematic side views showing the tilting deck in its two extreme tilted positions
  • Figure 15 is a perspective view similar to Figure 4 of yet another embodiment of the present invention.
  • Figure 16 is an enlarged view of the support structure for the deck supporting cables of the embodiment of Figure 15;
  • Figure 17 - 22 are partial schematic perspective views of different structures suitable for use in pivotally mounting the deck to the hulls;
  • Figure 23 is a schematic perspective view illustrating a water ballast system for pivoting the deck.
  • Figure 24 is a schematic perspective view of a system for moving the pivot point on the deck to balance the deck.
  • a logistics ship 10 constructed in accordance with the present invention, which includes a pair of elongated hulls 12, 14, which are laterally spaced from one another and provide the flotational buoyancy for the ship.
  • These hulls which in this embodiment illustrate a catamaran vessel, are connected to a superstructure 16 by generally vertical side walls 18.
  • the structural elements of superstructure 16, as described hereinafter, serve to hold the catamaran type hulls 12 together in a unified structure.
  • the hulls can also be additionally rigidly supported and connected to one another by transverse hydrodynamic foils or structural members which are normally submerged when the ship is in operation.
  • a logistics or cargo support deck 20 is mounted within the superstructure 16 between hulls 12 and 14.
  • Deck 20 is pivotally mounted, in any convenient manner, on a pivot arrangement which extends transverse to the longitudinal axis of the ship. Specific examples of the pivotal connection are described hereinafter.
  • the deck can tilt about this transverse or athwartships axis 40 so that its fore and aft ends 22 and 24 will oppositely raise and lower depending upon the needs at the time of operation.
  • Deck 20 includes a small bow ramp 26 which is pivotally mounted on the deck to be lowered from its raised position shown in Figure 1 to a lower position for allowing the discharge of cargo. The actuation of the bow ramp can be controlled in any convenient or known manner.
  • the rear end or aft end 24 of deck 20 has a ramp 28 pivotally mounted thereon with an auxiliary or extension ramp 30 pivotally connected thereto.
  • Ramp 28 can be lowered and extension ramp 30 extended to allow discharge of cargo from the rear of the ship.
  • Separate side ramps 32 are pivotally connected to the ramp 28 along pivot pivots 34 so that once ramps 30 and 28 are lowered, the side ramps can also be lowered to allow, for example, a vehicle moving from the deck 20 on to the ramp 28 to turn at 90 degrees and exit from the side ramps.
  • the ship can also provide for off shore discharge of amphibious vehicles directly from the deck into the water or onto a beach.
  • FIG. 2 and 3 schematically illustrate the pivotal motion of the cargo deck 20 in ship 10. As illustrated therein the forward ramp 26 is extended, but the rear ramps 28, 30 and side ramps 32, only one of which is seen in Figures 2 and 3, are retracted.
  • the forward ramp 26 When ship 10 is positioned to load or unload cargo with its fore end facing a dock, or the cargo hold of an adjacent vessel, the forward ramp 26 is extended and deck 20 is pivoted to allow the ramp 26 to rest on the dock or to receive a loading ramp of an adjacent vessel.
  • variations of the vertical position of the ship relative to the adjacent transport vessel or dock are accommodated by tilting of deck 20.
  • the mechanism for pivoting deck 20 can be released so that the deck pivots freely in the ship's hull 10 to accommodate sea way motion, changes in tide, and the like.
  • Deck 20 can be pivoted about pivot axis 40 in any convenient manner using hydraulic rams, cables, or the like, some of which are described in more detail hereinafter. Other known pivoting methods could also be apparent to those skilled in the art.
  • the pivoting deck 20 extends the entire length of the ship. However, in other embodiments, one or both ends of the deck can extend beyond the ship or be shorter than the length of the ship, depending upon requirements.
  • FIG 4 is a perspective view of another embodiment of the invention, with the ship's superstructure removed, showing the structure of the invention in greater detail.
  • the ship 60 in this embodiment includes a pair of long thin hull bodies 62, 64 which provide buoyant lift for the vessel.
  • Deck 20 is formed of any convenient rigid construction and is pivotally mounted at a pivot points 66 located in each of the hulls 62, 64. The specific pivotal connections are described hereinafter.
  • deck 20 may be reinforced in various ways. In the illustrated embodiment this is done by side truss structures 68 of any convenient or known form. In this embodiment the truss structures 68 are on the sides of deck 20 and extend above the deck and pivot points.
  • the trusses can extend below the deck along the insides of the hulls.
  • the trussing can extend both above and below the deck.
  • the deck 20 is pivotally mounted approximately amidships. As will be apparent, if a greater range of motion for deck 20 is required the pivot point 66 could be located closer to one end of the deck than the other so that the end furthest away from the pivot point will produce a greater distance between its extreme swing or tilt positions.
  • deck 20 is pivoted about pivot point 66 by a plurality of hydraulic rams 70 which are securely mounted in the superstructure of the ship, as described in detail hereinafter, to cause the deck to tilt about its axis of rotation as shown in Figures 2 and 3.
  • Figure 4 also illustrates more clearly the front ramp 26 in its raised or “up” position rotated on its pivot axis 27.
  • Figure 4 also shows the rear ramp 28 and its extension 30 in their downwardly pivoted or extended positions. In this particular illustration the side ramps 32 are not shown. These ramps can be pivoted between their "up” and “down” or extended positions in any convenient manner as would be apparent to those skilled in the art.
  • Figure 5 illustrates the truss structure for the ramp 20 in greater detail, wherein it is seen that the trusses include cross bracing 72 extending between them, transverse to the undersurface of the deck, to provide support for the cargo.
  • Figure 6 is a plan view of the ship shown in Figures 4 and 5.
  • the pivotal connection 66 is shown schematically in this drawing. In this illustration it is more clearly seen that the pivot point 66 in this embodiment is located slightly forward of amidships and the deck is balanced in its longitudinal position by the hydraulic rams 70 previously described. In this case ramp 26 is raised and the rear ramps 28, 30 are shown lowered. With this arrangement all of the weight the deck 20 and the cargo on it are supported on the hulls 62, 64 at the location of the pivot points 66. This arrangement provides for improved balancing and ballasting of the ship for effective trim purposes.
  • FIG 7 is a side elevational view of the ship shown in Figure 4.
  • rear ramp segments 28, 30 are illustrated in their lowered position.
  • Front ramp 26 is raised.
  • a pair of transverse foil structures 76 are provided connecting the two hulls 62, 64. These foils provide cross connecting strength for the two hulls and are configured as symmetric or asymmetric foils which can be oriented at a desired angle of attack to the water to provide lift, or may be simple trim structures that provide no additional hydrodynamic lift. Alternatively, the foils can be designed to be buoyant lifting bodies providing additional buoyancy for the vessel.
  • these cross foils also may include appendages, such as trim tabs, or propulsion nacelles.
  • these cross foils contain transmission drives for operating the propellers 80 to drive the ship.
  • the forward cross foil is also seen in Figure 8.
  • Figure 9a is a cross sectional view of the hull shown in Figure 4, with its superstructure 82 thereon.
  • the hull 60 has its aft end facing the aft end 90 of a cargo ship 92.
  • the latter has a stern ramp 94, i.e., a flat ramp which pivots out from the rear of the ship for loading and unloading.
  • a stern ramp 94 i.e., a flat ramp which pivots out from the rear of the ship for loading and unloading.
  • the stern ramp 90 of the cargo vessel is then lowered to rest on the deck 20, or the deck 20 can be tilted as necessary by rams 70 to accommodate that engagement.
  • the hydraulic rams 70 are connected to a structural member 94 which is part of the superstructure 82.
  • FIGS. 10a and 10b are additional perspective views of the ship shown in Figure 4. Although for light duty, the ship of Figure 4 could be operated as is, with simply the connection of the cross foils to provide lateral strength and support to the twin hulls, for heavier duty applications, transverse bridge beams 94 are provided which are respectively supported on the hulls 62, 64 by vertical columns 102. The central beam 94 provides the location of connection of the rams 70 to the structure as described above.
  • Figure 10b shows the ship 60 without the truss tilting deck for clarity and the cross foils 80 can be more clearly seen.
  • FIG. 10a While the upper cross structures 94 shown in Figure 10a are spaced from one another, it is contemplated that one single support structure or cross support structure could be provided along the length of the hulls where necessary. This type of structure is shown schematically in Figure 1.
  • Figure 11 schematically illustrates how the superstructure 82 can be arranged on the two supporting hulls over and around the tilting deck structure and incorporated with the beams 94 and columns 102. In this case the rams 70 are shown connected to the superstructure rather than the columns 102.
  • Figure 12 is a bottom view of just the twin hull structure with the foils 80 attached. As will be appreciated in this embodiment these hulls are as illustrated are long thin buoyant hulls with allow for high speed operation. However the hull structures themselves can be of any suitable shape, length and beam.
  • a pivoted deck in accordance with the invention can be applied to trimarans, quadmarans or even pentamarans wherein a separate tiltable deck would be positioned between each adjacent pair of hull structures.
  • a separate tiltable deck would be positioned between each adjacent pair of hull structures.
  • both ends of the pivot axis of each inclining deck are supported at each end by one of the hulls of the multi-hulled ship.
  • Each hull provides the reaction force necessary to support the loaded payload deck. Therefore a ship with one tilting balance payload deck requires two hulls, a ship with two tilting balance payload requires three hulls, etc.
  • Figures 13 and 14 provide schematic illustrations of the deck of the embodiment of Figure 4 when it is tilted. In this case, because the tilt axis is located slightly forward of a midship, the aft end of the deck will rise higher above the deck of the adjacent hull when it is in its raised position and the forward end of the deck will when it is in the raised position.
  • Figure 15 illustrates schematically a bumper arrangement mounted on the aft end of the vessel 60. This bumper arrangement is provided to precisely control the stand off distance between the inclined or tilting deck and the interfacing platform of the adjacent pier or ship structure.
  • the bumper system can be of any convenient construction and can be located in both the fore and aft ends of the ship.
  • the bumper system consists of a shock absorbing surface 100 formed of wooden ties or elastic materials, supported on a plurality of hydraulic shock absorbing rams 110.
  • rigid trusses are used to support the deck.
  • a suspension bridge like structure is used to support the deck. This structure consists of two pairs of main support cables 120 resting on pulleys 122 on the one of the cross beams 94 above the location of the pivot point of the deck.
  • Hanger cables 124 connect the support cables 120 to the deck in the manner of a suspension bridge.
  • This deck also can be tilted mechanically, using hydraulic rams or a power train and gear drive system known for use with bridge structures.
  • the inclination or tilting of deck 20 can be power driven as described above, but it can also be a free moving system.
  • the deck can be designed to be balanced on opposite sides of its pivotal mounting point and locked in place during loading or while the vessel is under way. The loading operation would be organized so that the load balances the deck to be horizontal while the ship is in motion.
  • the deck could be locked into place by any known mechanical means, including locking pins movable into mating receptacles on the hulls and deck respectively operated manually, by hydraulic devices, or by a device for creating a vacuum force that maintains the deck fixed relative to the hulls.
  • FIG. 17-22 illustrate various forms structures to create the pivotal connection between the deck 20 and the hulls (only one of which is illustrated in each of these figures).
  • a rigid support platform 130 having an arcuate surface 132 is provided extending inwardly from hull 64.
  • a similar support would be provided extending from the hull 62, or the member 130 could extend entirely across the space between the two hulls and provide additional lateral support for them.
  • the deck 20 in this case has a complimentary saddle portion 134 which rests and pivots on the surface 132.
  • the deck 20 is restrained and held against the surface 132 by hydraulic rams or other known mechanical means against longitudinal and vertical movement while allowing the deck to tilt.
  • Figure 18 discloses a pivot arrangement including large horizontal supporting pivot pin 140 extending from the hull 64, received in an appropriate collar or receptacle 142 rigidly mounted in the deck 20.
  • the hull 62 would have a similar pin received in another receptacle at the other side of the deck, or alternatively, one single pin can extend between the hulls and the deck built around it so that the pin not only supports the deck but also provides the appropriate pivoting action.
  • FIG. 19 The embodiment of Figure 19 is similar to the embodiment of Figure 17, except in this case, the arcuate surface 132 is formed as part of the deck 136 of the hull 64. In this case the saddle 134 extends laterally from the deck 20 instead of being below it, and simply rests on the arcuate support surface 132.
  • the embodiment of Figure 20 is similar to the embodiment of Figure 18, but in this case a pivot pin 150 extends from the side of the deck 20 and is received in a support aperture 152 in the deck in the hull 64.
  • Figure 21 illustrates the hull 64 having an upwardly extending support structure 162 integrally formed therewith in including a pivot pin 163 which extends through a pivot collar 164 supported by legs 166 or the like on the platform 20.
  • Figure 22 illustrates a well 176 formed in the hull 64 for receiving a pivot leg 172 having an arcuate tip 174 which allows the deck 20 to pivot in the complementary base 176 of the well 176.
  • FIG 23 illustrates another system for the controlling the tilting of the deck 20.
  • the deck is schematically illustrated between the two hulls 62, 64.
  • the deck 20 contains mounted therein separate ballast tanks 180, 182 at the aft and the fore ends respectively which are adapted to contain sea water or other fluids.
  • a pump 186 under suitable electronic control is used to pump fluid from one tank to another to cause the deck to tilt on its single pivot point support.
  • Figure 24 illustrates another feature of the present invention which contemplates allowing the pivot support to be moved relative to the deck 20, in order to change the balance point of the deck, depending upon the load.
  • the saddle 134, of the embodiment of Figure 17 is slidably mounted on the bottom of the deck 20 in any convenient manner, such as on rollers from a track below the deck 20, and connected to hydraulic rams 135 which can move the deck relative to the pivot point to balance the deck about the pivot point based on its load or desired tilt characteristics.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transportation (AREA)
  • Ship Loading And Unloading (AREA)
  • Jib Cranes (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)

Abstract

L'invention concerne un navire de logistique ayant un pont de chargement équilibré et supporté autour d'un pivot horizontal de telle sorte qu'il peut être incliné pour élever ou abaisser une extrémité du pont par rapport à l'autre extrémité afin de faciliter le déchargement ou le chargement du navire dans l'eau ou sur d'autres vaisseaux, plages ou quais.
PCT/US2007/082072 2006-10-25 2007-10-22 Navire de logistique avec un pont de charge utile inclinable WO2008070309A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85409906P 2006-10-25 2006-10-25
US60/854,099 2006-10-25

Publications (2)

Publication Number Publication Date
WO2008070309A2 true WO2008070309A2 (fr) 2008-06-12
WO2008070309A3 WO2008070309A3 (fr) 2008-08-07

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PCT/US2007/082072 WO2008070309A2 (fr) 2006-10-25 2007-10-22 Navire de logistique avec un pont de charge utile inclinable

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2475085A (en) * 2009-11-05 2011-05-11 David Armstrong Pivoting deck vessel for allowing transfer to a fixed structure
GB2483401A (en) * 2009-11-05 2012-03-07 David Armstrong Pivoting deck vessel for allowing transfer to a fixed structure

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592895A (en) * 1992-06-16 1997-01-14 Lockheed Missiles & Space Company, Inc. Small waterplane area high speed ship
US5713299A (en) * 1994-07-05 1998-02-03 Lopez Ibor Alino; Jose Submersible boat
US6676358B2 (en) * 2001-10-19 2004-01-13 Dave W. Smith Compact folding aircraft passenger ramp
US6702268B1 (en) * 1998-05-28 2004-03-09 Heian Europe S.R.L. Vacuum locking system for panels to be worked
US6723219B2 (en) * 2001-08-27 2004-04-20 Micron Technology, Inc. Method of direct electroplating on a low conductivity material, and electroplated metal deposited therewith
US6766623B1 (en) * 2003-03-18 2004-07-27 Peter A. Kalnay Foldable, expandable framework for a variety of structural purposes
US6877450B2 (en) * 2002-11-12 2005-04-12 Lockheed Martin Corporation Variable-draft vessel
US6880193B2 (en) * 2002-04-02 2005-04-19 Figg Bridge Engineers, Inc. Cable-stay cradle system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592895A (en) * 1992-06-16 1997-01-14 Lockheed Missiles & Space Company, Inc. Small waterplane area high speed ship
US5713299A (en) * 1994-07-05 1998-02-03 Lopez Ibor Alino; Jose Submersible boat
US6702268B1 (en) * 1998-05-28 2004-03-09 Heian Europe S.R.L. Vacuum locking system for panels to be worked
US6723219B2 (en) * 2001-08-27 2004-04-20 Micron Technology, Inc. Method of direct electroplating on a low conductivity material, and electroplated metal deposited therewith
US6676358B2 (en) * 2001-10-19 2004-01-13 Dave W. Smith Compact folding aircraft passenger ramp
US6880193B2 (en) * 2002-04-02 2005-04-19 Figg Bridge Engineers, Inc. Cable-stay cradle system
US6877450B2 (en) * 2002-11-12 2005-04-12 Lockheed Martin Corporation Variable-draft vessel
US6766623B1 (en) * 2003-03-18 2004-07-27 Peter A. Kalnay Foldable, expandable framework for a variety of structural purposes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2475085A (en) * 2009-11-05 2011-05-11 David Armstrong Pivoting deck vessel for allowing transfer to a fixed structure
GB2483401A (en) * 2009-11-05 2012-03-07 David Armstrong Pivoting deck vessel for allowing transfer to a fixed structure
GB2475085B (en) * 2009-11-05 2012-08-01 David Armstrong Pivoting deck vessel
GB2483401B (en) * 2009-11-05 2012-09-26 David Armstrong Pivoting deck vessel

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