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WO1994011237A1 - Bateau fabrique a partir de plaques metalliques - Google Patents

Bateau fabrique a partir de plaques metalliques Download PDF

Info

Publication number
WO1994011237A1
WO1994011237A1 PCT/FI1993/000477 FI9300477W WO9411237A1 WO 1994011237 A1 WO1994011237 A1 WO 1994011237A1 FI 9300477 W FI9300477 W FI 9300477W WO 9411237 A1 WO9411237 A1 WO 9411237A1
Authority
WO
WIPO (PCT)
Prior art keywords
boat
flanges
set forth
web
sheet
Prior art date
Application number
PCT/FI1993/000477
Other languages
English (en)
Inventor
Pertti Pasanen
Original Assignee
Pertti Pasanen
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
Priority claimed from FI925160A external-priority patent/FI925160A7/fi
Priority claimed from FI931571A external-priority patent/FI93532C/fi
Priority claimed from FI933484A external-priority patent/FI933484A0/fi
Application filed by Pertti Pasanen filed Critical Pertti Pasanen
Priority to AU54233/94A priority Critical patent/AU5423394A/en
Publication of WO1994011237A1 publication Critical patent/WO1994011237A1/fr

Links

Classifications

    • 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
    • B63B3/16—Shells
    • B63B3/18—Shells characterised by being formed predominantly of parts that may be developed into plane surfaces

Definitions

  • the present invention relates to a boat manufactured from (j metal sheets, such as aluminium sheet, comprising sheet strips extending lengthwise of the boat and fixed together at the edges thereof by means of longitudinal connecting joints, for which the strip edges are provided with bent connecting flanges.
  • This type of boat is easy to manufacture and it is also flexible and sturdy in structure. Especially, the boat can be provided with a hull that is long and straight for achieving a correct swimming angle and a slight water drag.
  • An object of the invention is to provide an improved boat, which is sturdy, light and easy to manufacture and whose bottom sheets are properly designed for reducing the water drag and sealing the joints as well as for preventing the corrosion of fastening elements in all joints.
  • a particular advantage is achieved by virtue that the boat has a smooth mid-section, i.e. there are no projections that would produce bubbles or vortexes within the sphere of action of the propeller. This increases considerably the propulsion power of the propeller.
  • the boat can use a substantially less powerful engine than the aluminum boats of a corresponding size having a traditional construction and design.
  • savings are made both in the price and fuel economy of the engine.
  • an engine less powerful than before will be able to lift this type of boat to "the surface plane", i.e. to swim without a detrminetal draft or displacement.
  • a problem here is that such a boat does not have a sufficient directional stability in cornering. In cornering, the boat winds up in sideslip and loses its directional stability. If the centre line of a boat is provided with a keel, it will produce bubbles or vortexes around the propeller, thus reducing the propulsion power of the propeller.
  • the problem is overcome in such a manner that on either side of the bottom mid-line, at a substantial distance from the mid-line there are longitudinal flanges, which extend from the bottom and are provided with holes or openings and which in cornering work against the sideslip of a boat.
  • the holes or openings are necessary for the reason that otherwise the water flowing below the bottom edge of a flange prevents the sufficient immersion of the flange in water. In that case, the flange would only prevent the tilting of a boat and would not provide a sufficient adhesion with water for preventing a sideslip.
  • water and possible air are capable of flowing through holes in the flange, the latter remains well submerged in water for effectively preventing the sideslip of a boat in cornering.
  • the assembly of semi-products into a finished boat can be made quickly by using bolt connections.
  • the assembled boat is turned upside down and the joint grooves are filled with a sealing compound.
  • the need for storage space is also reduced as most of the storage can be focused on semi-products instead of finished boats.
  • a particular operational advantage is achieved by virtue that the substantially flat-bottomed boat is not prone to capsize. When the boat is stationary and rests over its entire flat bottom on water, the boat is hardly at all tilted as compared to a boat having a sharp, curved bow.
  • a boat of the invention becomes sturdy as it only requires little or no weldings. Even at its folding points, an intact metal sheet is always stronger than a welded point.
  • the connecting joints between the sheets provide reinforcements for for an increased boat strength.
  • the sheet thickness can be small and it can be graduated as desired .
  • a boat of the invention becomes light as the boat structure requires no additional reinforcements, which are generally responsible for a substantial extra weight in larger aluminum boats.
  • a boat is generally the more seaworthy the longer it is, since the bottom of a long boat reaches simultaneously the crest of several waves for less rocking and a smoother passage.
  • each additional meter costs proportionally more as more reinforcements are required and that adds to labour, material and weight and, thus, a more powerful engine is also required.
  • the bottom of a boat made by a folding machine the making of a long folding bend does not require more time than the making of a short folding bend and, thus, the price of a longer boat is only increased by material costs and those are negligible considering the advantages gained in terms of seaworthiness.
  • the buyer receives, for almost the same price, a longer boat which, in addition to seaworthiness, has also more space.Since even a longer boat will be relatively lightweight, such longer boat hardly requires an engine more powerful than a short one.
  • fig. 1 shows a cross-section of a boat of the invention; (wherein thickness of the sheets is largely exaggerated) ;
  • fig. 2 shows a detail of fig. 1 in a larger scale
  • fig. 3 is a perspective view showing the basic design of a folded bottom sheet
  • fig. 4 is a perspective view showing the basic design of a reinforcement
  • fig. 5 is an end view showing the central section of the bottom of a boat according to a preferred embodiment of the invention.
  • fig. 6 is a perspective view showing the end of a flange used for preventing a sideslip.
  • figs. 7 and 8 show a general illustration of a boat hull in a plan and a side view, respectively.
  • a boat according to the exemplary embodiment shown in figs. 1 and 2 comprises On either side of the centre axis longitudinal sheet strips 1 , whose both edges are folded to form connecting flanges 13, 14 provided with holes for bolts 21 or like fastening elements. Between the longitudinal connecting flanges 14 is secured a reinforcement 4 provided with holes in its lower edge in alignment with the holes of flanges 14. The top end of reinforcement 4 is bent to form a flange 4a provided with holes for fastening to a deck board 9. The reinforcement flange 4 covers only part of the height of connecting flanges 14, thereby leaving between the connecting flanges 14 on the outside of the bottom a gap or groove 17 for a sealing compound.
  • a web 16 covering the sealing compound gap 17 and including a flange 18 penetrating and engaging inside the sealing compound.
  • the web 16 can be an aluminium profile made by extrusion.
  • a riser web 12 Adjacent to an outer edge 20 included in the sheet strips 1 is made a riser web 12 by bending said strip 1 along a folding line 11 to form a ridge projecting from the general shape of the bottom.
  • the connecting flange 13 providing the outboard facing side of said riser web ridge 12 is inclined towards the centre axis of a boat so as to create a sharp setback 20.
  • a moving boat rises more readily to the surface of water, i.e. "to plane”. This reduces the drag created by a boat.
  • the setback 20 the moving boat strives to suck air below the bottom, which further reduces the drag.
  • the next bottom sheet strips 2 are shaped basically the same way as bottom sheet strips 1.
  • the sheet strips 2 are also provided with connecting flanges 15, 13 and a bend 11 to form a riser web 12 as well as a setback 20.
  • a reinforcement web 5 fitted between flanges 13, 15 is fastened by a flange 5a to the floor board 9 and, respectively, a reinforcement web 6 fixed to flange 13 is fastened to the floor board 9.
  • the reinforcement web 5 is secured between connecting flanges 13, 15 by means of fastening bolts 21 , said web 5 only covering a part of the height of flanges 13, 15 so as to leave a sealing compound groove facing towards the bottom.
  • the reinforcement web 6 is also secured between the flange 13 and the fastening flange of a side sheet 3.
  • the side sheet 3 is fastened with an inner lining sheet 8 to the outer edge of floor board 9 and between sheets 3, 8 is possibly fitted a brace 7.
  • the described technique produces an extremely strong box-type structure, whereby the sheets can have a small wall thickness.
  • the sheet 1 can have a wall thickness of 4 mm, sheet 2 a wall thickness of 3 mm, and sheet 3 a wall thickness of 2 mm.
  • the wall thicknesses are illustrated close to a real scale, although in other respects the cross-sectional view is a reduction in size of nearly ten times in relation to the real scale.
  • the bottom is turned upwards and the gaps or grooves between connecting flanges 14, 14 and 13, 15 are filled with a sealing compound.
  • the gaps or grooves be sufficiently large to accommodate a sufficient amount of compound, whose inherent elasticity provides continuously a good tightness in the connecting joints.
  • the other joints can also provided with e.g. an aluminium web to serve as a filling and mechaniccal protection for the sealing compound.
  • such a web is not necessary with the exception of web 16 covering the centre joint.
  • the sheet strips 1, 2 illustrated in fig. 1 need not be made of two different sheets. In view of reducing the number of connecting joints, said sheets 1 and 2 can be replaced with a single sheet, whose mid-section is provided with a riser web 12 made by folding. This alternative embodiment is shown in fig. 1 with dash and dot lines.
  • the sheet strips 1 and 2 or a respective continuous strip and the foldings made therein are straight or linear over the entire bottom of a boat. Such linear foldings can be made quickly and readily by means of a folding machine.
  • the bow of a boat assembled from a sheet strip is fitted with a plastic-made bow piece 23, which is inserted a small distance inside the box structure.
  • the same bow piece fits in boats of varying lengths, whose cross- sectional profile can be the same.
  • the aft of a boat is closed e.g. with a transom 24, made of an aluminium sheet and fixed by welding to the ends of sheets 1, 2, 3.
  • the embodiment shown in fig. 5 is also provided with a T- web 16, covering a sealing compound gap 17 on the centre axis of a boat and including a T-stem penetrating and engaging within the sealing compound.
  • the T-cap provides a substantially flat riser web along the centre axis of a boat.
  • the outer bottom surface has a substantially smooth central area, i.e. it includes no protrusions that would create bubbles or vortexes within the sphere of action of the propeller.
  • longitudinal flanges which protrude from the bottom and in cornering prevent the sideslipping of a boat and facilitate the directional control in cornering.
  • longitudinal flanges 10 which extend e.g. 30 mm from the bottom.
  • the flanges 10 are provided with holes or openings 10a for allowing water and possible air to flow there ⁇ through, whereby the flanges 10 can be immersed in water although the boat has a certain kinetic component in lateral direction, i.e. in the transverse direction relative to flanges 10.
  • openings 10a may vary a great deal.
  • the openings 10a may be elongated slots.
  • the distance between flanges 10 must be substantially larger than the diameter of a circle circumscribed by the tips of the propeller blades upon its rotation.
  • the flanges 10 comprise one of the flanges of an L-web, while the other flange 10b is attached with an adhesive to the surface of bottom sheet 1.
  • the flanges 10 are fastened to the riser web 12 and, thus, are located adjacent to the joint area between two bottom sheet strips 1, 2.
  • the flanges 10 may cover most of the length of the hull of a boat.
  • the flanges 10 may also comprise a number of shorter successive lengths of flange with necessary flow ports therebetween.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

Bateau fabriqué à partir de plaques métalliques, telles que des plaques en aluminium. Les deux bords des bandes s'étendant dans le sens de la longueur du bateau sont repliés, de façon à constituer des bords d'accouplement (14, 13, 15) pourvues d'éléments de renforcement intermédiaire (4, 5) servant à supporter un plancher (9), ainsi qu'à constituer un espace (17) destiné à un matériau de remplissage, entre les bords d'accouplement à l'extérieur du fond. La plaque est repliée en position contiguë au bord extérieur et/ou à la section médiane desdites bandes (1, 2), de façon à constituer une nervure (12) faisant saillie depuis le contour général du fond.
PCT/FI1993/000477 1992-11-13 1993-11-12 Bateau fabrique a partir de plaques metalliques WO1994011237A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54233/94A AU5423394A (en) 1992-11-13 1993-11-12 A boat manufactured of metal plates

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
FI925160A FI925160A7 (fi) 1992-11-13 1992-11-13 Vene ja menetelmä sen valmistamiseksi
FI925160 1992-11-13
FI931571 1993-04-07
FI931571A FI93532C (fi) 1993-04-07 1993-04-07 Metallilevystä valmistettu vene
FI933484 1993-08-06
FI933484A FI933484A0 (fi) 1993-08-06 1993-08-06 Baot framstaelld av metallplaotar

Publications (1)

Publication Number Publication Date
WO1994011237A1 true WO1994011237A1 (fr) 1994-05-26

Family

ID=27241537

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1993/000477 WO1994011237A1 (fr) 1992-11-13 1993-11-12 Bateau fabrique a partir de plaques metalliques

Country Status (2)

Country Link
AU (1) AU5423394A (fr)
WO (1) WO1994011237A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6666162B2 (en) * 2001-06-21 2003-12-23 Darris E. Allison Aluminum hull boat with extruded running surface
NL2018697B1 (nl) * 2017-04-12 2018-10-19 Linssen Holding B V Vaartuig

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59732C (de) * HOWALDTSWERKE in Kiel Verfahren zur Herstellung zerlegbarer Schiffskörper
US703413A (en) * 1901-11-26 1902-07-01 Edward Hayes Construction of composite vessels.
US1822199A (en) * 1927-05-20 1931-09-08 Cairns Dev Company Boat hull
CH191399A (de) * 1935-12-02 1937-06-15 Risch Werner Leichtmetallschiff.
CH333054A (de) * 1955-08-20 1958-09-30 Brugger Paul Boot
FI60508B (fi) * 1979-09-03 1981-10-30 Hannu Ilmari Sarvanne Foerfarande foer tillverkning av en aluminium- eller staolbaot
EP0049871A2 (fr) * 1980-10-13 1982-04-21 Austria Metall Aktiengesellschaft Procedure pour la construction d'une coque de bateau et installation pour la fabrication des profiles de coque de bateau

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59732C (de) * HOWALDTSWERKE in Kiel Verfahren zur Herstellung zerlegbarer Schiffskörper
US703413A (en) * 1901-11-26 1902-07-01 Edward Hayes Construction of composite vessels.
US1822199A (en) * 1927-05-20 1931-09-08 Cairns Dev Company Boat hull
CH191399A (de) * 1935-12-02 1937-06-15 Risch Werner Leichtmetallschiff.
CH333054A (de) * 1955-08-20 1958-09-30 Brugger Paul Boot
FI60508B (fi) * 1979-09-03 1981-10-30 Hannu Ilmari Sarvanne Foerfarande foer tillverkning av en aluminium- eller staolbaot
EP0049871A2 (fr) * 1980-10-13 1982-04-21 Austria Metall Aktiengesellschaft Procedure pour la construction d'une coque de bateau et installation pour la fabrication des profiles de coque de bateau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6666162B2 (en) * 2001-06-21 2003-12-23 Darris E. Allison Aluminum hull boat with extruded running surface
NL2018697B1 (nl) * 2017-04-12 2018-10-19 Linssen Holding B V Vaartuig

Also Published As

Publication number Publication date
AU5423394A (en) 1994-06-08

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