Patent ID: 10435121

Abstract:
A fin box is provided for detachably attaching a fin to a surfboard. The surfboard has a nose and a tail at opposite ends. The fin has a groove base with one or more pins. The fin box includes one or more inner walls. The inner walls have (i) a hollow base with a width that is at least as great as a width of the groove base and a length that is at least as great as a length of the groove base, (ii) one or more recess parts disposed at locations that correspond to the locations of the pins of the fin, the recess parts extending in a direction that is substantially perpendicular to a length of the fin box, and (iii) one or more ditch parts that extend from the recess parts, the ditch parts extending in a direction that is substantially parallel to the length of the fin box and toward the tail of the surfboard. The recess parts and ditch parts are configured to allow the fin to be inserted into the fin box by (i) pressing the fin downward into the fin box until a bottom of the groove base is adjacent to the hollow base, and (ii) sliding the fin toward the tail of the surfboard, without any opposite motion toward the nose of the surfboard. The ditch parts are configured to, when the fin is attached to the fin box, hold the pins of the fin in the fin box.