The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2006
Filed:
Dec. 22, 2004
David T. Blake, Jr., San Francisco, CA (US);
David T. Blake, Jr., San Francisco, CA (US);
Other;
Abstract
A dynamic fin system (DFS) achieves fin rotation passively via water flow so that no direct active control of fin rotation is required by the watercraft operator. The DFS, using a combination of fin rotation via at least one axle and resistive forces applied to a fin mounting tab, provides an assembly in which a fin can pivot from side to side in a reliable, effective and simple way. The DFS provides ease in turning and stability at a neutral position while minimizing the amount of flow resistance. The DFS provides a strong fin mounting, and uses a combination of an axle for rotational control, a resistive centering force, and a force preload for stabilizing the fin in the neutral position. The DFS provides a mount for a rotating fin in a watercraft hull that supports repositioning of the rotating fin axis both forward and rearward in the hull.