Water craft with adjustable fin
OwnerJohn M. Rodgers, John Collinsinventors
Life of this patent
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Abstract
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.
Claims33
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;
- and
- a means for adjustably securing the fin at any of a plurality of angles of rotation about the axis of rotation.
A water craft comprising:
- a fin having a base with a generally circular cross-section and a plurality of projections extending therefrom;
- a board;
- a fin box attached to the board, the fin box comprising a recess having a generally circular cross-section in a plane perpendicular to an axis of rotation and having a plurality of slots formed therein for receiving the respective plurality of projections;
- wherein the fin base is insertable into the recess at any predetermined one of a plurality of angles of rotation about the axis of rotation by alignment of the projections with predetermined respective ones of the slots.
A water craft comprising:
- a board;
- an opening formed in a bottom surface of the board, the opening having a circular cross-section in a plane perpendicular to an axis of rotation;
- a fin having a base with a circular outside surface inserted within the circular opening, the fin base being rotatable within the opening about the axis of rotation;
- and
- a fastener for adjustably securing the fin base at any of a plurality of angles of rotation about the axis of rotation.
A kit for upgrading a water craft, the kit comprising:
- a fin box comprising a recess having a circular cross-section in a plane perpendicular to an axis of rotation;
- a fin having a base with a circular cross-section inserted within the recess, the fin being rotatable within the recess about the axis of rotation;
- and
- a means for securing the fin at a plurality of angles of rotation about the axis of rotation.
A water craft comprising:
- a board;
- a fin box attached to the board and having a recess formed therein;
- a fin having a base adapted for insertion into the fin box recess and rotatable therein about an axis of rotation;
- and
- a means for adjustably securing the fin base within the fin box recess at any of a plurality of angles of rotation about the axis of rotation.
A water craft comprising:
- a board;
- a fin box attached to the board and having a recess formed therein;
- a fin having a base adapted for insertion into the fin box recess and rotatable therein about an axis of rotation;
- and
- a fastener adapted adjustably to secure the fin base within the fin box recess at any of a plurality of angles of rotation about the axis of rotation.
Dependencies are inferred from the claim text.