초록 ▼

A water craft having an adjustable fin assembly. The fin includes a base having a circular cross-section for rotating within a circular recess formed in a fin box attached to a water board. A means is provided for securing the fin at a predetermined angle of attack. The fin may be secured by a set s

A water craft having an adjustable fin assembly. The fin includes a base having a circular cross-section for rotating within a circular recess formed in a fin box attached to a water board. A means is provided for securing the fin at a predetermined angle of attack. The fin may be secured by a set screw or pin passing through the fin box and making contact with the base. The pin may pass through a hole in the base to provide vertical and rotational support for the fin. The pin may be moved between an engaged position and an unengaged position by the rotation of a gear interfacing with teeth formed on the pin. The fin base and fin box may include mating projections and slots for securing the angular position of the fin and an associated pin for retaining the fin within the fin box.

대표청구항 ▼

[ We claim as our invention:] [1.]1. A water craft comprising:a board;a fin box attached to the board, the fin box comprising a recess having a circular cross-section in a plane perpendicular to an axis of rotation;a fin base having a base with a circular cross-section inserted within the recess, th

[ We claim as our invention:] [1.]1. A water craft comprising:a board;a fin box attached to the board, the fin box comprising a recess having a circular cross-section in a plane perpendicular to an axis of rotation;a fin base having a base with a circular cross-section inserted within the recess, the fin base being rotatable within the recess about the axis of rotation; anda means for adjustably securing the fin at any of a plurality of angles of rotation about the axis of rotation.