Adjustable watercraft fin apparatus and method having three...

Details Adjustable watercraft fin apparatus and method having three... Adjustable watercraft fin apparatus and method having three...

2007-12-25

2007-12-25

Swinehart, Ed (Department: 3617)

Buoys, rafts, and aquatic devices

Water skimming or walking device

Having stabilizing surface

C114S140000

Reexamination Certificate

active

11042573

ABSTRACT:
The three-degree of freedom fin apparatus and method described herein is for use on a watercraft (such as a surfboard) and allows adjustment of up to three degrees of freedom, including a translational degree of freedom along a longitudinal axis of the fin structure in the fore and aft direction (longitudinal translation or pitch), a first rotational degree of freedom about the longitudinal axis (roll), and a second rotational degree of freedom about a vertical axis centered at a point on the fin (yaw). Pitch adjustment is made by sliding a base plate and fin assembly along the longitudinal axis. Yaw adjustment is made by moving a front portion of the fin assembly about a yaw pivot point and the rear portion along a yaw track in the base plate. A roll adjustment is made by rotating a fin unit of the fin assembly about the longitudinal axis.

REFERENCES:
patent: 5503581 (1996-04-01), McCullough
patent: 6244921 (2001-06-01), Pope
patent: 6752674 (2004-06-01), Jolly
patent: 2006/0035543 (2006-02-01), English et al.

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