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Surfboard having an essentially elongate, flat basic body which is capable of floating and, during use, rests with its underside on the water, and on whose upper side there is provided a standing surface for the feet of the sports person using the board, and in which at least one fin is attached to

Surfboard having an essentially elongate, flat basic body which is capable of floating and, during use, rests with its underside on the water, and on whose upper side there is provided a standing surface for the feet of the sports person using the board, and in which at least one fin is attached to the underside. An opening extending from the underside towards the upper side is provided in the basic body for receiving the said fin, whose extent in the transverse direction of the board, that is to say transversely to the direction of travel and transversely to the surface plane of the fin, is less than the cross-section of the fin; the outer edges of the fin cross-section at the connection point to the board are preferably designed in such a way that the outer edges rest essentially completely against the underside of the board.

대표청구항 ▼

1. Surfboard A board having an essentially elongate, flat basic body having a longitudinal axis which is capable of floating and, during use, rests with its underside on the water, and on whose upper side there is provided a standing surface for the feet of the a sports person using the board, said

1. Surfboard A board having an essentially elongate, flat basic body having a longitudinal axis which is capable of floating and, during use, rests with its underside on the water, and on whose upper side there is provided a standing surface for the feet of the a sports person using the board, said board having a fin box penetrating said basic body of said board, said fin box having a cavity therein for receiving a fin, at least one fin being attached to the underside, wherein an opening extending from the underside towards the upper side is provided in the basic body for receiving said fin, of said board, said fin being received in said cavity of said fin box,said opening being designed in the form of a fin box which penetrates said basic body and, said fin being attached in said opening cavity by an attachment means, and the said fin box having a box top part which is open towards the upper side of the surfboard board, and a box bottom part which is open towards the underside of said surfboard board, wherein a plate is being arranged in said fin box between said fin top box top part and said fin bottom box bottom part, in which said plate said opening is provided, and through which having an opening therethrough, said attachment means extends extending through said opening in said plate to engage the fin, said cavity for receiving said fin being disposed in said box bottom part, wherein said fin has a first surface and a second surface, said first and second surfaces defining a thickness therebetween, each of said first and second surfaces having a proximal region which is proximate to said board, and a distal region which is distal to said board, each of said first and second surfaces extending at least downward from said proximal region thereof to said distal region thereof, wherein when viewed along an edge of said fin in a direction substantially parallel to said longitudinal axis of said board, said proximal region of said first surface of said fin has a substantially linear profile, said board being a surfboard or a sailboard.2. Surfboard Board according to claim 1, wherein the extent of said opening cavity in the transverse direction of the board, said transverse direction being transversely to the direction of travel and transversely to the surface plane of the fin, is less than the cross-section of the fin, and wherein the outer edges of the fin cross-section at a connection point to the board are designed such that the outer edges rest essentially completely against the underside of the board.3. Surfboard according to claim 1, wherein the fin is attached in said opening by an attachment means.4. Surfboard Board according to claim 3 1, wherein said opening has a longitudinal extent essentially in the longitudinal direction of the board, which is greater than the extent of the attachment means in the longitudinal direction, so that the attachment means and the fin can be moved in the longitudinal direction in said opening cavity when said attachment means has been loosened.5. Surfboard Board according to claim 3 1, wherein said attachment means is a screw which is provided with a screw head, and wherein said opening has a resting surface on which said screw head rests in order to hold said fin.6. Surfboard Board according to claim 1, wherein said box top part consists of has two opposite side walls which are arranged essentially parallel to the longitudinal direction of the surfboard board and which are connected to one another by two shorter cross walls.7. Surfboard Board according to claim 1, wherein said box bottom part has two longitudinal walls running essentially parallel to the longitudinal direction of the surfboard board and two short cross walls which connect the latter.8. Surfboard Board according to claim 1, wherein said fin has a journal which engages in said opening fin box.9. Surfboard Board according to claim 1, wherein said fin has a journal which engages in said opening cavity of said box bottom part of said fin box, wherein said journal has side walls, and is of essentially cuboid design, wherein said fin box has said cavity having side walls, and wherein said opening in said box bottom part is said cavity being designed in such a way that, in the assembled state of said fin, the side walls of said journal rest essentially against the side walls of said fin box cavity.10. Surfboard Board according to claim 1, wherein further comprising a seal is provided between the surface of provided between the fin, which faces and the underside of the surfboard, and the surfboard board.11. Surfboard Board according to claim 1, wherein an opening provided with said attachment means being a threaded attachment means, said fin having a threaded bore is provided in said fin therein for engagement of an said threaded attachment means provided with a threaded bore .12. Method for the manufacture of a surfboard board for surfing or windsurfing, said board having an essentially elongate, flat basic body which is capable of floating and, during use, rests with its underside on the water, and on whose upper side there is provided a standing surface for the feet of the a sports person using the board, said board having a fin box penetrating said basic body of said board, said fin box having a cavity therein for receiving a fin, at least one fin being attached to the underside, wherein an opening extending from the underside towards the upper side is provided in the basic body for receiving said fin, said fin being received in said cavity of said fin box, wherein firstly the basic body of the surfboard board consisting of a plastic upper shell, plastic lower shell and foam located between them is manufactured at least to a great extent, wherein cutouts are then made in said basic body, and wherein laminates are then introduced into said cutouts, which laminates, in the cured state, from a said fin box, and which method uses mouldings which are arranged in said cutouts with said laminates in such a way that, in the cured state, the laminates have the desired shape after removal of said mouldings.13. Method according to claim 12, wherein said mouldings consist of aluminum.14. Board according to claim 1, wherein said fin has a journal which engages in said cavity of said box bottom part of said fin box.15. Board according to claim 8, wherein said journal has at least two opposing side walls that are tapered or inclined toward one another, said tapered opposing side walls of said journal providing an essentially trapezoidal cross-section thereof.16. Board according to claim 15, said cavity of said box bottom part having side walls, said cavity being designed such that, in the assembled state of said fin, the tapered side walls of said journal are pressed essentially against the side walls of said cavity, at least at an entrance to said cavity.17. Board according to claim 16, wherein said side walls of said cavity in said box bottom part are tapered apart from one another in a direction toward the underside of said board, and wherein in the assembled state, said tapered side walls of said journal are pressed against said tapered side walls of said box bottom part.18. Board according to claim 11, said fin having a journal which engages in said cavity of said box bottom part, wherein said threaded bore is provided as a threaded receptacle that is molded into said journal of said fin.19. Board according to claim 18, said threaded attachment means extending through said opening in said plate to be received in said threaded receptacle molded into said journal of said fin.20. Board according to claim 18, wherein said threaded attachment means is a screw.21. Board according to claim 18, wherein said threaded receptacle is a brass sleeve.22. Board according to claim 1, said board being a surfboard.23. Board according to claim 1, said board being a sailboard.24. Board according to claim 9, said journal being of essentially polyhedral design.25. Method according to claim 12, said laminates comprising glass-fibre mats impregnated with a resin material, said method further comprising the step curing said resin-impregnated laminates to form said fin box.26. Method according to claim 25, further comprising the step of cutting or grinding excess laminate following curing of said resin-impregnated laminates.27. Method according to claim 25, said mouldings comprising an upper moulding and a lower molding, wherein said upper and lower mouldings are inserted into said cutouts from said upper side and said underside respectively of said board after introduction of said laminates into said cutouts.28. Method according to claim 27, further comprising the steps of removing said mouldings from said cutouts once said laminates have cured, and cutting or grinding excess laminate to finish said board having said fin box therein.