Surfboard fin box with detachable, leashed fin

Abstract

A new design for a self-releasing surfboard fin and box is presented. The fin is held in the fin box by an attachment means that permits the fin to release easily when struck. The fin is retained connected to the box and the board by means of a fin leash. The fin is easily reattached by inserting the fin and then re-tightening the attachment means.

1 . An improved surfboard fin box system, the fin box system comprised of a box, a surfboard fin, and a fin leash, 
 the box a rectangular container with an open top, the container in an elongated rectangular shape, the length of the container sufficient to receive a surfboard fin through the open top of the box, the box possessing a plurality of fin attachment means, the fin attachment means disposed along the open top of the box such that the fin attachment means exert pressure on the side of a fin inserted into the open top of the box and resting in the box, the box possessing a box attachment point,    the fin possessing an inserted end and a fin end, the inserted end of the fin possessing a distinctive shape for quick fin release from the box,    the fin inserted end possessing a fin leash attachment point, one end of the fin leash attached removably to the fin leash attachment point, the fin leash other end attached removably to the box attachment point,    the fin inserted end possessing a fin leash cutout, the fin leash cutout shaped in such a manner as to permit the fin leash to be stored under the fin and inside the box when the fin is inserted into the open top of the box.    
   
   
       2 . An improved surfboard fin box system as in  claim 1 , where the inserted end of the fin possesses a distinctive shape which is two beveled cuts on opposite ends of the inserted end.  
   
   
       3 . An improved surfboard fin box system as in  claim 1 , where the inserted end of the fin possesses a distinctive shape which is a smoothly rounded curve.  
   
   
       4 . An improved surfboard fin box system as in  claim 1 , where the fin attachment means is a set screw fitted to a screw threaded slot.