EP0035293B1 - Multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards - Google Patents

Multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards Download PDF

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Publication number
EP0035293B1
EP0035293B1 EP81200153A EP81200153A EP0035293B1 EP 0035293 B1 EP0035293 B1 EP 0035293B1 EP 81200153 A EP81200153 A EP 81200153A EP 81200153 A EP81200153 A EP 81200153A EP 0035293 B1 EP0035293 B1 EP 0035293B1
Authority
EP
European Patent Office
Prior art keywords
surf
board
stem
mono
stern
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.)
Expired
Application number
EP81200153A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0035293A3 (en
EP0035293A2 (en
Inventor
Jan Bos
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.)
Polymarin BV
Original Assignee
Polymarin BV
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 Polymarin BV filed Critical Polymarin BV
Priority to AT81200153T priority Critical patent/ATE7586T1/de
Publication of EP0035293A2 publication Critical patent/EP0035293A2/en
Publication of EP0035293A3 publication Critical patent/EP0035293A3/en
Application granted granted Critical
Publication of EP0035293B1 publication Critical patent/EP0035293B1/en
Expired legal-status Critical Current

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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
    • B63B3/02—Hulls assembled from prefabricated sub-units
    • B63B3/04—Hulls assembled from prefabricated sub-units with permanently-connected sub-units
    • B63B3/06—Hulls assembled from prefabricated sub-units with permanently-connected sub-units the sub-units being substantially identical
    • 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
    • B63B32/53—Sectionalised boards, e.g. modular, dismountable or foldable boards

Definitions

  • Multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards.
  • the invention relates to a multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards, having more than one mast and sail, comprising interconnectable parts which can be disconnected.
  • a multi unit surf-board of this type is known from US patent specification 4,100,870.
  • Said known multi unit surf-board can have the form of a tandem surf-board formed by two mono surf-boards by means of a special interconnecting or coupling portion by means of which the two stern ends of the two mono surf-boards can be interconnected to form a tandem surf-board.
  • This known tandem surf-board has the advantage that it can be composed of two mono surf-boards suitable for mono sailing which mono surf-boards can be combined to a tandem surf-board if so desired. This desire exists because a tandem surf-board enables higher speeds.
  • a disadvantage of said known multi unit surf-board is that a special connecting piece is necessary which not always is available and requires a special shape of the stern whereas when mounted in tandem the second surf-board by being mounted in the opposite direction has an unfavourable flow profile.
  • Tandem surf-boards made from one piece and having two or more masts are known as well but they have the disadvantages that transportation no longer can take place upon the roof of a motor vehicle, that the price is high and that they only can be used if there are sufficient participants, which have to be present at the same time.
  • Purpose of the invention is to provide a multi unit surf-board formed by at least two mono surf-boards the owners of which at will can use said mono surf-boards as such or can combine them to a tandem surf-board or even multiple surf-board.
  • each one of said parts is formed by a complete mono surf-board each being formed at its stern and stem respectively such that the stem of a next surf-board by its form fits into the stern of a preceding surf-board and the reverse.
  • each part itself is a mono surf-board and said parts fit into each other like a male-female construction due to which they can be interconnected in any desirable number without disturbing the properties when used as mono surf-board.
  • Each surf-board has a stern of a form such that the stem of an identical surf-board can be enclosed and mounted into it. In this way two or more surf-boards in a simple way can be interconnected to a multiple surf-board.
  • the sailing properties of the mono surf-board are affected neither by the shape of stem and stern nor by the recess in the stern. If the surf-boards are combined to a multiple surf-board then in the same way as with known surf-boards a multiple sail surface is obtained without considerable increase of the resistance within the water. Due to this the possibility is obtained to form combined surf-boards by means of a surf-board which need not to cost more than a normal mono surf-board and due to this an additional dimension can be given to the surf sailing sport without increasing its costs.
  • the surf-boards which according to the invention can be interconnected to a tandem surf-board or a multiple surf-board are entirely identical
  • the invention also relates to those surf-boards which are identical at stern and stem but inbetween different to be able to combine junior surf-boards with surf-boards for grown-up people. It even is possible to combine surf-boards which are not identical at all but of which one has a stem which fits into the stern of another surf-board.
  • the mono surf-board suitable to be combined to a multiple surf-board at the location of the front end of the recess and at the location of the stem is provided with connecting members which together form a connection.
  • connecting members By the form fitting insertion of this stem in the recess of the stern relatively few and simple connecting means are sufficient. Often a connection of the stem in the front end of the recess will already be sufficient.
  • members at the rear ends of the legs of the stern extending on both sides of the recess which lock against upward movement a stem placed in said recess.
  • connection can be obtained by providing those parts of stem and stern which fit upon each other at least locally with the complementary parts of a velcro fastener.
  • Velcro fasteners have the advantage to enable a quick connection which gives way however upon overloading.
  • connection between the front end of the stem and the front end of the recess can be obtained in that the surf-board at the front end of the recess as well as at the stem is provided with connecting members which together form a connection.
  • the stern at the front end of the recess and/or at the rear ends of the legs of said stern is provided with cams extending above the recess and adapted to engage the top surface of a stem placed within the recess. Due to this in combination with the upwardly inclined side faces of the legs of the recess which side faces deliver a locking downwardly, a locking in all directions is obtained and provisions then still only are necessary to prevent disengagement in axial direction.
  • Surf-boards having centre boards are well known and it is also known that such a centre board is removably inserted within a longitudinal slot.
  • the surf-board according to the invention can be provided as well with such a removable centre board. This is desirable not only for transportion purposes, as is well known, but to prevent that too many centre boards effect the steerability of a combination of two or more surf-boards according to the invention.
  • the surf-board at its stern is provided with a hollow space which, with the exception of the rearwardly open insert opening is closed in principle and has an inner shape which is equal to the outer form of the stem and that openings are provided in the stem and in top and bottom portion of the stern of a form and location such that in case a stem is placed into the stern opening both surf-boards are interconnectable by a connecting member which can be inserted through the in line lying openings.
  • a connecting member can be a pin or a plurality of pins but preferably said openings are formed by longitudinal slots and the connecting member has the form of a centre board such as e.g. one of the centre boards of the two or more mono surf-boards which are to be interconnected. In this way without additional elements a tandem surf-board can be obtained having the same or almost the same steering qualities as a mono surf-board.
  • Figure 1 shows a tandem surf-board comprising a front surf-board 1, a second surf-board 2.
  • the surf-board 1 has been provided with a mast 3 with sail 4 and the surf-board 2 with a mast 5 with sail 6.
  • an insertable centre board has been provided formed by a plate mounted within a slot provided for that purpose. This is well known.
  • the surf-board 1 has a similar slot and if so desired a centre board can be inserted there as well.
  • FIGS. 2 and 3 show one of the surf-boards of Figure 1 at larger scale.
  • the cross sections are indicated which are found as well in the timber plan indicated in Figure 4.
  • the surf-board at the stern has been provided with a recess 8 open rearwardly and having side flanks 9 and 10 respectively diverging upwardly and joined at the location of a flat strip 11.
  • This recess can be made as well with a bottom as indicated with the line 8'.
  • the stem generally indicated at 12 has side flanks 13 and 14 as well as a flat front piece 15 which surfaces 13, 14 and 15 in shape fit upon the surfaces 9, 10 and 11.
  • velcro fastener belt can be provided.
  • the interlocking of the stem 12 in the recess 8 of a stern can be obtained in a simple way by providing the recess upwardly of abutting members e.g. in the form of cams 19, 20 and 21.
  • the interlocking in axial direction then in a simple way can be obtained by means of the pin 22 which can be inserted through an eye 23 of the cam 19 and into the bushing 24 of the stem.
  • velcro fastener belt can be applied upon the surface 11 or over the seam of the joined stem and stern.
  • Figures 5, 6 and 7 show a different form of interconnecting at a location of the rear ends of the legs which on both sides of the recess 8 form the stern.
  • the belt 26 comprises a left hand part secured to one leg of this stern by means of the connecting strip 27 and a right hand part 28 connected to the right hand portion by means of a connecting strip 29. Both ends are interconnected by means of a tension member 30 of known construction.
  • connection by means of the pin 25 is shown more in detail in figures 8 to 10 inclusive.
  • Figure 8 31 is a stern and 32 a stem.
  • plate 33 Upon the surface indicated with 11 in Figure 8 plate 33 has been mounted shown in Figure 9 which with bent ends 34, 35 lies in one plane with top surface and bottom surface respectively of the stern. Said plate 33 has two bushings or sleeves 36, 37 spaced apart and at the inner side, which means between the outwardly turned surface of the plate 33 and the stern, which stern to this end has been provided with a recess 38 which as shown in Figure 9 and 10 is a little bit larger than the bushings 36, 37.
  • the stem 32 in the same way has been provided with a plate 39 with bushing 40.
  • Said bushing 40 has a length such that it fits inbetween the bushings 36 and 37.
  • connection at the outer ends of the stern can be performed as shown in Figures 5 and 7 inclusive, which means with a tension belt, or in the manner as shown in Figures 2 and 3 by means of the cams 20 and 21.
  • Other combinations of connecting means and other embodiments of connecting means of course are possible.
  • Figures 11 and 12 show a preferred embodiment according to which the surf-boards 50 at the stern have a recess 51 which is only open at the rear end and the inner form of said recess 51 is such that the stem 52 fits exactly into the recess 51.
  • the two surf-boards 50 are interconnected by means of a centre board 53 which extends through slots 54 and 55 of top wall and bottom wall respectively of the recess 51 and through the slot 56 of the stern.
  • This centre board 53 can be a centre board which also can be used in the slot 57 of a surf-board 50 when used as mono surf-board.
  • the invention has been described in its application upon surf-boards. If a body such as a surf-board, the underside of which has the property that with sufficient speed it starts to glide upon the water, is provided with side boards than a vessel shape derived from the surf-board can be formed or a surf-board form derived from a vessel form can be formed, offering more comfort e.g. in that the possibility of a seat is created. Also then the principle upon which the invention is based can be applied.
  • the Velcro fastener mentioned above is a fastener well known in textile between two faces one having a plurality of loops the other a plurality of elastic hooks.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Connection Of Plates (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
EP81200153A 1980-02-11 1981-02-06 Multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards Expired EP0035293B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200153T ATE7586T1 (de) 1980-02-11 1981-02-06 Aus mehreren einheiten bestehendes segelbrett, z.b. tandemsegelbrett, das aus mindestens zwei einzelnen segelbrettern besteht.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL8000841 1980-02-11
NL8000841A NL8000841A (nl) 1980-02-11 1980-02-11 Surfplank of dergelijk planerend vaartuig.
AU74779/81A AU7477981A (en) 1980-02-11 1981-08-31 Vessel with tandem hull

Publications (3)

Publication Number Publication Date
EP0035293A2 EP0035293A2 (en) 1981-09-09
EP0035293A3 EP0035293A3 (en) 1981-09-23
EP0035293B1 true EP0035293B1 (en) 1984-05-23

Family

ID=34105008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200153A Expired EP0035293B1 (en) 1980-02-11 1981-02-06 Multi unit surf-board such as a tandem surf-board formed by at least two mono surf-boards

Country Status (4)

Country Link
EP (1) EP0035293B1 (nl)
AU (1) AU7477981A (nl)
DE (1) DE3163702D1 (nl)
NL (1) NL8000841A (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050675A1 (de) * 2007-07-12 2009-01-15 Jutta Biedermann Schwimmbrett-bag aufblasbar

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3275175D1 (en) * 1981-07-17 1987-02-26 Michael John Menear Wind-propelled craft
FR2549442B1 (fr) * 1983-07-21 1985-10-11 Vacher Serge Planche a voile extensible en tandem
US4545772A (en) * 1984-05-14 1985-10-08 Stockhausen Philip J Sailboard cargo carrier

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1547450A (fr) * 1967-06-09 1968-11-29 Procédé d'accouplement de deux corps flottants, système de bateaux accouplables ainsi reliés et leurs diverses applications
US3820258A (en) * 1972-10-31 1974-06-28 W Fahrner Apparatus and method for dredging retention transport and disposal ofdredged material
US3996868A (en) * 1974-05-14 1976-12-14 Fa. Immobilien Commerce Estbl. Dr. Ivo Beck Windsurfer
US4100870A (en) * 1976-04-01 1978-07-18 Mistral Windsurfing Ag Surfboard
FR2429145A1 (fr) * 1978-06-20 1980-01-18 Saget Michel Planche a voile demontable
GB1560011A (en) * 1976-09-25 1980-01-30 Shark Wassersport Windsurfer board kit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7906848A (nl) * 1978-09-20 1980-03-24 Ten Cate Sports Samengestelde zeilplank.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1547450A (fr) * 1967-06-09 1968-11-29 Procédé d'accouplement de deux corps flottants, système de bateaux accouplables ainsi reliés et leurs diverses applications
US3820258A (en) * 1972-10-31 1974-06-28 W Fahrner Apparatus and method for dredging retention transport and disposal ofdredged material
US3996868A (en) * 1974-05-14 1976-12-14 Fa. Immobilien Commerce Estbl. Dr. Ivo Beck Windsurfer
US4100870A (en) * 1976-04-01 1978-07-18 Mistral Windsurfing Ag Surfboard
GB1560011A (en) * 1976-09-25 1980-01-30 Shark Wassersport Windsurfer board kit
FR2429145A1 (fr) * 1978-06-20 1980-01-18 Saget Michel Planche a voile demontable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007050675A1 (de) * 2007-07-12 2009-01-15 Jutta Biedermann Schwimmbrett-bag aufblasbar

Also Published As

Publication number Publication date
EP0035293A3 (en) 1981-09-23
EP0035293A2 (en) 1981-09-09
DE3163702D1 (en) 1984-06-28
NL8000841A (nl) 1981-09-01
AU7477981A (en) 1983-03-10

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