Patent ID: 7048599
Filing Date: 2006-05-23
Classification: B63B,B63H

Abstract:
1. A manually propelled watercraft for transporting a user on water, comprising: a buoyant body having a longitudinal axis and a top side and a bottom side disposed adjacent to the water; a first track disposed on the body substantially parallel to the longitudinal axis; a second track disposed on the body in substantial parallel relation to the first track; a first vehicle slidably coupled to the first track and movable to and from first and second positions relative to the body, the first vehicle includes upper and lower platforms disposed in substantially superimposed relation to each other, each platform having sides and the upper platform being slidable to and from forward and rearward positions relative to the lower platform; a second vehicle slidably coupled to the second track and movable to and from the first and second positions; a first fin pivotally coupled to a bottom side of the first vehicle and being pivotable to and from an extended position that is inclined relative to the longitudinal axis and a retracted position that is substantially parallel to the longitudinal axis, wherein when the upper platform is disposed in the forward position, the fin is substantially disposed in the retracted position, and when the upper platform is disposed in the rearward position, the fin is substantially disposed in the extended position; and a second fin pivotally coupled to a bottom side of the second vehicle and being pivotable to and from an extended position that is inclined relative to the longitudinal axis to maximize water resistance for propulsion of the body and a retracted position that is substantially parallel to the longitudinal axis to minimize water resistance; wherein when the first vehicle is moved from the first position to the second position, the first fin is substantially disposed in the extended position to maximize water resistance for propulsion of the body, and when the first vehicle is moved from the second position to the first position, the first fin is substantially disposed in the retracted position to minimize water resistance.