Patent ID: RE38840

Claim:
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.