EP2268536A2 - Landungsboot - Google Patents

Landungsboot

Info

Publication number
EP2268536A2
EP2268536A2 EP09722527A EP09722527A EP2268536A2 EP 2268536 A2 EP2268536 A2 EP 2268536A2 EP 09722527 A EP09722527 A EP 09722527A EP 09722527 A EP09722527 A EP 09722527A EP 2268536 A2 EP2268536 A2 EP 2268536A2
Authority
EP
European Patent Office
Prior art keywords
ramp
landing craft
craft
landing
section
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP09722527A
Other languages
English (en)
French (fr)
Other versions
EP2268536B1 (de
Inventor
Ian Mackereth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BMT Defence and Security UK Ltd
Original Assignee
BMT Defence Services 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 BMT Defence Services Ltd filed Critical BMT Defence Services Ltd
Publication of EP2268536A2 publication Critical patent/EP2268536A2/de
Application granted granted Critical
Publication of EP2268536B1 publication Critical patent/EP2268536B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
    • B63B27/143—Ramps

Definitions

  • This invention relates generally to marine landing craft.
  • marine landing craft are flat-bottomed vessels with a substantially box shaped cross-section.
  • the forward end of a conventional landing craft comprises a hinged ramp rather than a v-shaped bow typical of other boats and marine vessels.
  • the ramp is provided to facilitate the loading and unloading of cargo onto a beach, for example.
  • the ramp is generally attached to the landing craft via an external hinge and is raised or lowered by a pair of winch operated chains.
  • One way to increase the speed of a typical landing craft is to streamline the hull of the craft, that is to say introduce a v-shaped profile to at least the bow section of the vessel.
  • profiling the bow section in this manner necessarily leads to a narrowing of the hull opening which in turn restricts the type and size of cargo that can be usefully transported on the vessel.
  • a profiled bow section may result in the ramp having to be located higher up from the waterline.
  • the ability of the craft to be utilised in beach landing operations is negated, since this type of ramp will require a dock or quay to effect the disembarkation of personnel or the unloading of cargo.
  • a landing craft having a ramp pivotally mounted at an open end thereof, wherein the landing craft includes biasing means for exerting a downward force on the ramp when in a lowered position exposing said open end.
  • the biasing means also operates as an actuating device for lowering and raising the ramp.
  • the biasing means comprises at least one hydraulic ram or actuator.
  • the landing craft includes locking means for locking the ramp in a lowered position.
  • the ramp includes lateral guide portions adapted to co-operate with landing craft frontal portions that delimit an opening of said open end.
  • a surface of the ramp that faces outward when said ramp is in a raised position is faceted and includes a triangular portion disposed so as to provide a ramp ground contact portion when said ramp is in a lowered position.
  • the landing craft has a substantially v-shaped keel and a forward section that tapers inwardly towards the bow.
  • the lateral guide portions of the ramp form a contiguous bow section of a landing craft forward section when said ramp is in a raised position.
  • the ramp is pivotally mounted to said landing craft via a hinge system that is internal to the hull of the craft.
  • the ramp includes a sensing system adapted to detect loads that exceed a predetermined safety level and to deactivate said locking means in response to predetermined safety parameters.
  • a method of operating a landing craft ramp including the steps of: lowering the ramp until a forward grounding edge of the ramp is grounded; applying a required amount of downforce at the grounding edge until a predetermined proportion of the landing craft displacement is supported by the grounding edge; and locking the ramp in place so as to maintain support for the predetermined proportion of the landing craft displacement.
  • the required amount of downforce is applied to the grounding edge via at least one hydraulic ram or actuator.
  • the method includes the step of detecting when a ramp load exceeds a predetermined safety limit.
  • the method also includes the step of unlocking the ramp when one or more predetermined safety parameters have been breached.
  • a landing craft having a ramp pivotally mounted at an open end thereof, wherein a forward facing surface of said ramp is non-planar and includes a grounding section, and wherein said grounding section is adapted to anchor the ramp in response to an applied downward force when the ramp is in a lowered position.
  • the grounding section is a triangular planar surface.
  • Figure 1 shows a conventional landing craft including a tapered bow
  • Figure 2 shows the forward section of a landing craft in accordance with an embodiment of the present invention
  • Figure 3 shows a ramp of a landing craft in accordance with an embodiment of the present invention
  • Figure 4 shows a partial view of a grounded landing craft in accordance with an embodiment of the present invention.
  • Figure 5 is a partial close-up view of the landing craft of Figure 4.
  • a conventional landing craft 1 comprises a generally box- shaped hull 2, a wheelhouse 6 situated in the stern section 3, and a ramp 4 allowing access to a cargo hold area 5.
  • the ramp 4 is pivotally attached to the hull 2 via an external hinge (not shown) located proximal to the waterline.
  • the bow section 7 tapers inwardly towards the ramp 4.
  • bow reinforcement structures 10 introduce a bottleneck section 8 that results in an overall reduction of the cargo hold area 5. Not only does this reduce the total cargo capacity of the vessel, it also restricts the width 9 of the ramp 4, which in turn restricts the size and type of cargo that may access the landing craft 1.
  • the landing craft 20 shown partially and beached in Figure 4 has no equivalent bottleneck section since the tapered forward section 30 (see Figure 2) does not compromise the width 22 of the cargo hold area 21.
  • the forward section 30 includes a contiguous bow section 25 formed by the ramp 24. Structural integrity is maintained by constructing the ramp 24 to include lateral guide portions 28.
  • the lateral guide portions 28 advantageously serve as guide rails that aid the loading and unloading of vehicular cargo. Furthermore, they provide additional protection to the bow structure from impact or collision damage.
  • the hinging system interconnecting the ramp 24 with the forward section 30 is internal to the hull. The hinging system is disposed with respect to the ramp 24 such that the ramp 24 is clear of the hull opening when in a fully lowered position.
  • the landing craft 20 is beached by grounding the v-shaped keel 26 on a shore line, for example.
  • ramp lowering will be initiated so that ramp 24 will come into contact with the beach shortly after the keel 26 has ground on the beach.
  • the ramp 24 is lowered under operation of a ramp actuator 11 (see Figure 5).
  • a ramp actuator 11 see Figure 5
  • each actuator 11 comprises a hydraulic ram and any other such ancillary equipment as is known to be required for their controlled operation.
  • the ramp 24 is raised and lowered by means of a winch and chain system and the ramp actuators 11 provide ramp biasing means.
  • the external surface of the ramp is faceted and includes a triangular section 29.
  • the forward edge 27 of the triangular section 29 constitutes a second grounding means and comes into contact with the ground shortly after the keel 26 has grounded.
  • the landing craft 20 is stable with respect to both transverse and longitudinal disturbances, thus facilitating quicker and safer loading/unloading operations or the disembarkation of personnel from the cargo hold area 21.
  • the landing craft 20 includes a ramp safety system implemented to ensure that the ramp 24 when locked in a lowered position is automatically unlocked in the event that one or more predetermined safety parameters have been breached or compromised.
  • the safety system would also incorporate an alarm for indicating when a ramp load has exceeded a predetermined maximum load capacity.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Toys (AREA)
EP09722527.0A 2008-03-20 2009-03-19 Ein landungsboot Not-in-force EP2268536B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0805120.3A GB2458632B (en) 2008-03-20 2008-03-20 A landing craft with a stabilising forward ramp
PCT/GB2009/050258 WO2009115842A2 (en) 2008-03-20 2009-03-19 A landing craft

Publications (2)

Publication Number Publication Date
EP2268536A2 true EP2268536A2 (de) 2011-01-05
EP2268536B1 EP2268536B1 (de) 2018-09-12

Family

ID=39356756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09722527.0A Not-in-force EP2268536B1 (de) 2008-03-20 2009-03-19 Ein landungsboot

Country Status (3)

Country Link
EP (1) EP2268536B1 (de)
GB (1) GB2458632B (de)
WO (1) WO2009115842A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI122772B (sv) * 2010-02-12 2012-06-29 Kewatec Aluboat Ab Oy Bogport och bogportsenhet
JP6609799B2 (ja) * 2015-10-23 2019-11-27 三井Ｅ＆Ｓ造船株式会社 船舶及び船舶の設計方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078075A (en) * 1960-06-03 1963-02-19 Gen Am Transport Line puller
US3483838A (en) * 1968-02-23 1969-12-16 Eric Rath Non-broaching beach cargo ship
FR2144989A5 (de) * 1971-07-06 1973-02-16 France Etat
GB1402735A (en) * 1972-11-16 1975-08-13 Green A F Marine landing craft
GB2022517B (en) * 1978-05-31 1982-06-23 Cargospeed Equip Ferry vessel provided with a ramp
FR2511969A1 (fr) * 1981-08-28 1983-03-04 Etude Realisa Navale Ste Breto Structure de porte d'etrave de navire, formant rampe de debarquement
DE19623164C2 (de) * 1996-05-30 2001-06-21 Johannes Schroeter Wasserfahrzeug für Binnengewässer
DE19702417A1 (de) * 1997-01-24 1998-07-30 Mannesmann Rexroth Ag Vorrichtung zum Verstellen von Rampen
US6000358A (en) * 1998-05-14 1999-12-14 Dickenson; Robert P. Beaching bow for floating platforms and watercraft
JP3818429B2 (ja) * 2000-10-11 2006-09-06 株式会社石垣 舟艇の離岸装置
US6792886B1 (en) * 2002-03-14 2004-09-21 Biophan Technologies, Inc. Planing landing craft
US7137350B2 (en) * 2004-05-21 2006-11-21 Waldock William L Catamaran with extending platform carried by the underwing and an extending deployable ramp carried by the extending platform
US7111579B2 (en) * 2004-09-23 2006-09-26 Lockheed Martin Corporation Apparatus comprising a ship-to-shore interface

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009115842A3 *

Also Published As

Publication number Publication date
GB2458632B (en) 2012-04-25
WO2009115842A2 (en) 2009-09-24
GB2458632A (en) 2009-09-30
WO2009115842A3 (en) 2010-05-27
GB0805120D0 (en) 2008-04-23
EP2268536B1 (de) 2018-09-12

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