Patent ID: 8376790

Claim:
A wave-powered water vehicle which comprises (1) a float, (2) a swimmer, and (3) a tether connecting the float and the swimmer; the float, swimmer and tether being such that, when the vehicle is in still water, (i) the float is on or near the surface of the water, (ii) the swimmer is submerged below the float, and (iii) the tether is under tension; the float comprising means for reversibly altering the buoyancy of the float; and the swimmer comprising (2a) a swimmer body having a longitudinal axis, and (2b) a fin system which (a) is secured to the body, (b) comprises a fin, and (c) when the device is in wave-bearing water, (i) has a configuration which changes as a result of the wave motion, and (ii) interacts with the water to generate forces which tend to move the swimmer in a horizontal direction.