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WO1998014361A1 - Coque de bateau - Google Patents

Coque de bateau Download PDF

Info

Publication number
WO1998014361A1
WO1998014361A1 PCT/NZ1997/000122 NZ9700122W WO9814361A1 WO 1998014361 A1 WO1998014361 A1 WO 1998014361A1 NZ 9700122 W NZ9700122 W NZ 9700122W WO 9814361 A1 WO9814361 A1 WO 9814361A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
hull
sides
bottom part
plastics material
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.)
Ceased
Application number
PCT/NZ1997/000122
Other languages
English (en)
Inventor
Charles Caulder Bree
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU44043/97A priority Critical patent/AU4404397A/en
Publication of WO1998014361A1 publication Critical patent/WO1998014361A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/70—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by using moulds; Moulds or plugs therefor
    • B63B73/72—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by using moulds; Moulds or plugs therefor characterised by plastic moulding, e.g. injection moulding, extrusion moulding or blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
    • B63B73/43—Welding, e.g. laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
    • B63B73/46—Gluing; Taping; Cold-bonding

Definitions

  • This invention relates to a hull and/or a method of forming a hull and/or a method of controlling the shape or configuration of a hull and has been devised particularly though not solely for use in relation to hulls which have been rotationally moulded of materials such as polyethylene and in particular single skin rotationally moulded hulls.
  • Polyethylene has previously been used for rotationally moulding boat hulls.
  • the rotationally moulded hull is usually formed as a double skin with the inner and outer layers bonded together at some position to give rigidity. This is often achieved by providing ribs on one or both layers and bonding the layers together at the position of the ribs.
  • polyethylene is a flexible material which is able to flex in 0 substantially all directions from the plane of the material.
  • Polyethylene is a desirable material from which to form a boat hull because of its high impact resistance and resistance to wear by scuffing or scraping. It has been suggested to make a hull from a single skin and to provide a tunnel or corrugations in the material to provide rigidity to the hull notwithstanding the use of the flexible polyethylene material.
  • Double skin polyethylene boats are disadvantageous because the double skin leads to a heavy hull for example about two and half times the weight of a single skin. Also some flexing can occur between the positions of the joins.
  • the invention consists in a hull having a bottom part and sides, a plate fixed to the sides at at least a substantial number of points around the periphery of the plate and the plate being spaced apart from the bottom part.
  • the plate has cut-outs within the area of the plate.
  • the cut-outs do not extend to the periphery of the plate.
  • the plate is substantially continuous adjacent the sides about the periphery of the plate.
  • the plate is buoyant.
  • the hull is formed of material substantially flexible in all directions from the plane of the material, the plate when affixed to the sides giving operationally effective stiffness to the hull.
  • the bottom part and sides are formed by single skin rotational moulding of a plastics material.
  • the plate is formed by rotational moulding of a plastics material.
  • the plastics material is polyethylene.
  • the sides have an outwardly extending rebate, the periphery of the plate being positioned in the rebate and fixed to the material defining the rebate.
  • the invention consists in a method of forming a hull comprising the steps of providing the bottom parts and sides of a hull, providing a plate and attaching the plate to the sides at least a substantial number of points, the plate being spaced from the bottom part.
  • bottom parts and sides are formed by single skin rotational moulding of plastics material.
  • the plate is formed by rotational moulding of a plastics material.
  • the plastics material is polyethylene.
  • the invention consists in a method of controlling the shape or configuration of a hull having bottom parts and sides and having a degree of flexibility, the method comprising the steps of positioning a plate within the bottom parts and sides, the plate being spaced from the bottom parts and attaching the plate to the sides, the step of attaching giving the hull a degree of stiffness which is operationally effective.
  • the sides are drawn inwardly from or moved away from the rest position of the sides thereby altering at least the fore and aft curvature of the bottom parts of the hull.
  • the method further includes the step of selecting a desired size of plate.
  • said method further includes the step of altering the effective width of the plate after attachment to the sides- so as to vary the curvature of the bottom parts of the hull.
  • SUBSTITUTE SHEET Figure 1 is a side elevation of a hull according to one preferred form of the invention.
  • Figure 2 is a view of the hull of Figure 1 from the stern
  • Figure 3 is a plan view of the hull of Figure 1 with a plate forming part of the invention partly cut away.
  • Figure 4 is a perspective view of a possible plate construction for use in the invention
  • Figure 5 is a cross section on "A-A" in Figure 4 but showing the hull
  • Figure 6 is a diagrammatic view through a connection between parts of a hull and a plate according to the invention.
  • a hull which include a base hull unit which has a bottom 2 and sides 3.
  • the base hull unit hull 1 is formed from a flexible material that is to say, again in the preferred form, a material which is able to flex out of its plane at any point of the material.
  • a material of this type is polyethylene.
  • the bottom parts 2 may be substantially flat and by flat is meant a surface which may have some curvature but presents a flat surface in the form of a dory without any substantial keel. Skids or runners 4 may be provided if desired.
  • the base hull unit 1 is provided by rotational moulding of polyethylene material to form a single skin.
  • the rotational mould may be made to produce two hull units at a time, or inverted above the other. Once completed the hull units are divided along a centre line and the sides shaped as required.
  • the hull further includes a plate 10 which is shown pecked in Figures 1 and 2.
  • the plate 10 is shown pecked in Figures 1 and 2.
  • the plate 10 may be formed from any suitable material such as for example a sheet of marine plywood or may be rotationally moulded from a suitable material such as polyethylene for example in the form of a double skin so as to provide buoyancy chambers at desired positions about the plate.
  • the plate 10 is substantially rigid. In the preferred form cut- outs 1 1 are provided in the area of the plate 10 but these do not extend to the perimeter 12 of the plate. Tt is desired that the perimeter 12 form a substantially continuous band although small cut-outs or apertures for example for water drainage could be provided if desired.
  • the plate 10 is affixed to the sides 3 at at least a substantial number of points.
  • the fixing may be achieved by providing an outward rebate 15 in the sides 2 and placing the plate 10 so that its periphery extends into the rebate 15.
  • the plate can then be affixed for example by bolts at a substantial number of positions such- as bolts 16 shown in
  • a plate 10 is rotationally moulded so as to have a hollow interior 21 and thereby provide buoyancy in use.
  • Two apertures 22 and 23 are shown but the configuration can be varied as required.
  • the outer periphery of the plate 10 is provided with an outwardly extending rib 24 which in use is positioned in the channel formed by rebate 15. This may.be retained in position by including in the plate 10 trapped threaded sockets 25 which are positioned by techniques well known in the rotational moulding industry.
  • Bolts 26 pass through apertures 27 in hull 1 to engage sockets 25 to fix the plate 10 into base hull unit 1.
  • a suitable number of such sockets are provided to give sufficient engagement to minimise movement between base hull unit 1 and plate 20. About twenty such fixing points should be sufficient for a five metre hull.
  • a combination of flexible base hull unit 1 and substantially rigid plate 10 is maintained by this construction.
  • buoyancy can be provided for example by positioning buoyant material between the bottom 2 and parts of the plate 10. Where cut-outs 1 1 are provided the remaining parts of the plate 10 will form satisfactory seating in use.
  • the shape and configuration of the hull may be changed by changing the shape of the plate 10.
  • the sides of the hull can be drawn in towards the plate 10 and this would have the effect of decreasing the curvature of the fore and aft shape of the hull.
  • the sides can be forced outwardly which has the effect of increasing the curvature of the hull.
  • the shape, particularly the fore and aft curvature of the hull can be changed during use of the boat.
  • a more planar bottom to the hull can be achieved for higher speeds and a more curved arrangement for greater stability if required.
  • a dory type hull is particularly suitable for this hull but the concepts could be used with a "V" hull although a further plate (not shown) to form a floor may be required below the plate 10.
  • a hull and/or a method of forming a hull and/or a method of controlling the shape of a hull is provided which has some advantages.
  • the mould can create two base hull units in one charge of the
  • SUBSTITUTE SHEET apparatus which double hull can then be slit down the middle to form the two base hull units.
  • the base hull units can be stacked one inside the other so as to minimise storage and transportation space.
  • the plate is transported and stored separately and is installed in the base hull unit immediately prior to sale or display.
  • the invention is not limited to single skin rotationally moulded boats, where such manufacturing methods are used the invention makes a single skin rotationally moulded polyethylene boat technically viable as racking of the hull is reduced.
  • the weight is reduced compared to a double skin boat even if a larger wall thickness for example about 10mm is used.
  • a double skin boat would be about two and half times the weight of a single skin boat formed by the method of the present invention.
  • the ability to vary the shape of the hull and in particular the bottom part is also an advantage.
  • the gunwale is left with some flexibility to absorb impacts. Flotation fenders can be fixed to the gunwale.
  • the invention is not restricted to any particular hull shape and can be used for a large variety of boat types including canoes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une coque ayant une partie fond (2) et des côtés (3). On fixe une plaque (10) sur les côtés (3), au niveau d'au moins un nombre important de points, sur la périphérie de la plaque (10), puis on écarte celle-ci (10) de la partie fond (2). Dans l'un des modes de réalisation préférés, la coque est flexible et, en plaçant des plaques de différentes dimensions ou en modifiant l'empreinte d'une plaque (10), on peut ajuster le contour de la partie fond (2).
PCT/NZ1997/000122 1996-10-02 1997-09-30 Coque de bateau Ceased WO1998014361A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44043/97A AU4404397A (en) 1996-10-02 1997-09-30 A boat hull

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ299497 1996-10-02
NZ299497A NZ299497A (en) 1996-10-02 1996-10-02 Flat hull single skin

Publications (1)

Publication Number Publication Date
WO1998014361A1 true WO1998014361A1 (fr) 1998-04-09

Family

ID=19925958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1997/000122 Ceased WO1998014361A1 (fr) 1996-10-02 1997-09-30 Coque de bateau

Country Status (3)

Country Link
AU (1) AU4404397A (fr)
NZ (1) NZ299497A (fr)
WO (1) WO1998014361A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693604A (en) * 1952-06-04 1954-11-09 Rufus C Jefferson Collapsible boat
GB1003032A (en) * 1960-12-29 1965-09-02 Dunlop Rubber Co Boats
US3984887A (en) * 1974-07-23 1976-10-12 Keigo Tanemoto Portable collapsible boat
US5063870A (en) * 1991-01-23 1991-11-12 Warren Wagner Boat bottom construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693604A (en) * 1952-06-04 1954-11-09 Rufus C Jefferson Collapsible boat
GB1003032A (en) * 1960-12-29 1965-09-02 Dunlop Rubber Co Boats
US3984887A (en) * 1974-07-23 1976-10-12 Keigo Tanemoto Portable collapsible boat
US5063870A (en) * 1991-01-23 1991-11-12 Warren Wagner Boat bottom construction

Also Published As

Publication number Publication date
NZ299497A (en) 1999-06-29
AU4404397A (en) 1998-04-24

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