EP0083346A1 - Corps flottant pour planches a voile ou de surf - Google Patents

Corps flottant pour planches a voile ou de surf

Info

Publication number
EP0083346A1
EP0083346A1 EP82901904A EP82901904A EP0083346A1 EP 0083346 A1 EP0083346 A1 EP 0083346A1 EP 82901904 A EP82901904 A EP 82901904A EP 82901904 A EP82901904 A EP 82901904A EP 0083346 A1 EP0083346 A1 EP 0083346A1
Authority
EP
European Patent Office
Prior art keywords
rib
floating body
foam
core
reinforcing layers
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.)
Withdrawn
Application number
EP82901904A
Other languages
German (de)
English (en)
Inventor
Urs P. Meyer
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.)
Mistral Windsurfing AG
Original Assignee
Mistral Windsurfing AG
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 Mistral Windsurfing AG filed Critical Mistral Windsurfing AG
Publication of EP0083346A1 publication Critical patent/EP0083346A1/fr
Withdrawn legal-status Critical Current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 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/50—Boards characterised by their constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/40—Twintip boards; Wakeboards; Surfboards; Windsurfing boards; Paddle boards, e.g. SUP boards; Accessories specially adapted therefor

Definitions

  • the invention relates to a floating body for windsurfing or surfing, which consists of a foam with an integrated stiffening.
  • the floating bodies or surfboards for windsurfing that are mainly on the market today are relatively heavy with a weight of 20 to 25 kg, so that it is not easy for adolescents and female athletes to carry such a surfboard over a longer distance or to lift it onto the car roof or unload from it.
  • the surfboards or floating bodies commonly used today also have further disadvantages which have already been attempted to be avoided with particularly lightweight constructions. A relatively heavy board dives deeper in waves and creates more resistance and is therefore slower and less likely to turn.
  • the surfboards which are mostly composed of thermoplastic half-shells and contain polyurethane foam, do not always have an absolutely tight joint, so that water can penetrate into the foam core, making the board even heavier. Sharp edges on the rigid thermoplastic shell pose a risk of injury if the driver falls himself or the surfboard collides with other swimmers.
  • the rib preferably has a rectangular cross section and is upright with respect to the top and bottom of the floating body and embedded in the foam body at a distance from the top and bottom.
  • the height of the rib arranged upright decreases from the longitudinal center of the float towards the two ends. The desired flexibility, which varies over the length of the floating body, is thus achieved, and a noticeable reduction in weight can also be achieved with the cross-section decreasing towards the ends.
  • reinforcement layers made of fiberglass on the top and bottom of a core made of structural foam have proven to be particularly expedient.
  • the rib can advantageously already be designed in such a way that it is prepared to attach a mast foot or a sword case and / or a fin to it.
  • Fig. 2 shows a cross section through the floating body.
  • the floating body 1 of FIG. 1 has an embedded in a Wegumstoff body 2 and nearly all over the length of the floating body extending rib 3 "which as shown in Fig. 1 seen approximately from the longitudinal center of the float from toward the ends in the vertical Height decreases.
  • the width of the rib 3 is constant over the length.
  • a rib 3 is preferably provided on the longitudinal axis of the floating body, but two ribs can also be provided at a distance from the longitudinal axis.
  • the rib 3 is a composite construction which consists of a core h and reinforcing layers 5 and 6 firmly connected to the top and the bottom thereof.
  • the core 4 expediently consists of glass fiber-reinforced rigid polyurethane foam with fiberglass laminates as reinforcing layers on the top and bottom.
  • the rib core With a length of 300 cm and a width of 2 cm and an average height of 5 cm, the rib core with a material density of 200 kg / m3, a weight of 600 gr. Together with the fiberglass laminates with a thickness of about 1 mm, the total weight of the rib is slightly over 800 gr.
  • This rib is embedded upright in the foam body 2 , whereby the connection can be made by gluing.
  • the foam body 2 consists of polyethylene foam or polystyrene foam or polyurethane foam, which has a density of 10 to 40 kp / m3.
  • an outer skin 7 is firmly connected by gluing or welding, which is flexible and which also consists of a foam layer, but which has a density of at least 50 kp / m3, which means a greater density than the foam.
  • ⁇ toff body 2 has.
  • This outer skin has the advantage that due to the flexible property it can absorb shocks well and that the sailor can hardly injure himself on his own floating body due to a fall.
  • the floating body consisting of the above-mentioned materials, including the rib, has a weight of approx. 9 kg and a volume of 1801.
  • the average density of the floating body is 50 kp / m3 - if these values are compared with the corresponding values of a conventional windsurfing board, which have a weight of about 23 kg, a volume of 2301 and an average density of 100 kp / m3, it follows from the comparison that the floating body according to the invention has a 50% better weight than the conventional surfboards. This result can be improved even further, since the weight can be reduced even further by using an even thinner outer skin, so that a floating body weighing 8 kg can also be produced.
  • the particular advantage of the floating body described above also consists in the fact that the glider stands on a water-repellent surface which is not completely level with the closed pores and on which the glider's foot has a good grip and even sinks somewhat can, which increases the contact area. Since the foamed material acts as a good insulation layer, the sailor standing on it also has the feeling of warmth.
  • the float has a very flat bottom and is a pronounced glider as a windsurfing board, which is somewhat disadvantageous compared to other surfboards in weak winds, but slides very quickly in stronger winds and then becomes very fast.
  • the floating body In the sliding state, the floating body can be controlled almost like a water ski, and when traveling over short waves the elastic properties of the material have a very positive effect, with shocks being cushioned and damped. If there are cracks in the surf, the stiffening rib offers better resistance to breakage than conventional boards.
  • the particular advantage is that the incorporated rib enables a distribution of stiffness and strength independent of the shape of the floating body.

Landscapes

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

Abstract

Le corps flottant (1) comporte une nervure de raidissement (3) noyée, selon l'axe longitudinal du corps flottant, dans un corps en matière poreuse (2) en mousse de polyéthylène ou de polystyrol. Cette nervure (3), disposée de chant et ayant une largeur uniforme, présente une hauteur qui diminue graduellement depuis le milieu du corps flottant vers ses extrémités. La nervure (3) est constituée d'un noyau (4) comportant sur les côtés supérieur et inférieur des couches de renforcement (5, 6) en fibre de verre. Le corps flottant ainsi réalisé présente un poids extrêmement faible d'environ 9 kg et de très bonnes propriétés de conduite, en particulier comme glisseur. Par la construction et le façonnage de la nervure (3) il est possible d'obtenir une répartition de la rigidité indépendante de la forme extérieure du corps flottant.
EP82901904A 1981-07-07 1982-07-02 Corps flottant pour planches a voile ou de surf Withdrawn EP0083346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4457/81 1981-07-07
CH445781 1981-07-07

Publications (1)

Publication Number Publication Date
EP0083346A1 true EP0083346A1 (fr) 1983-07-13

Family

ID=4276473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901904A Withdrawn EP0083346A1 (fr) 1981-07-07 1982-07-02 Corps flottant pour planches a voile ou de surf

Country Status (4)

Country Link
EP (1) EP0083346A1 (fr)
CA (1) CA1174909A (fr)
IT (1) IT1151904B (fr)
WO (1) WO1983000127A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537703C1 (de) * 1985-10-23 1992-09-24 Taa Tech Administration Ag Verbundkoerper,insbesondere Segel- oder Wellenreitbrett,sowie Verfahren zur Herstellung desselben
EP0491768B1 (fr) * 1989-09-13 1995-07-05 KEYS, Gary Engin d'exercice nautique
AU635564B2 (en) * 1989-09-13 1993-03-25 George Hamilton-Greenough Surf craft
US5295883A (en) * 1991-02-15 1994-03-22 Kransco Bodyboard with stiffening reinforcement
SG79227A1 (en) * 1998-04-17 2001-03-20 Inst Materials Research & Eng Fiber-reinforced composite product with graded stiffness
US6036560A (en) * 1999-02-05 2000-03-14 Earth & Ocean Sports, Inc. Variable flexible stringer, bodyboard and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543315A (en) * 1967-10-09 1970-12-01 William L Hoffman Soft board fabrication
US4276844A (en) * 1979-06-18 1981-07-07 Kransco Manufacturing, Inc. Soft sailboard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300127A1 *

Also Published As

Publication number Publication date
IT8222283A1 (it) 1984-01-07
CA1174909A (fr) 1984-09-25
IT8222283A0 (it) 1982-07-07
WO1983000127A1 (fr) 1983-01-20
IT1151904B (it) 1986-12-24

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830305

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841214

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MEYER, URS P.