Patent ID: 7834474
Filing Date: 2010-11-16
Classification: F03B,F05B,Y02A,Y02E

Abstract:
1. A wave energy conversion device, for use in relatively shallow water, comprising: a base portion formed and arranged for anchoring to the bed of a body of water in use of the device; an upstanding flap portion pivotally connected to said base portion, said flap portion being formed and arranged to oscillate, in use, backwards and forwards about the vertical in response to wave motion acting on faces of the flap portion; and power extraction means for extracting energy from the movement of the flap portion; characterised in that said device is formed and arranged so that when the base portion is anchored to the bed of a body of water with the flap portion facing the wave motion, the base portion and the flap portion extend vertically through at least the entire depth of the water, to present a substantially continuous surface to the wave motion throughout the full depth of water from the wave crest to the sea bed, and said flap portion is sufficiently buoyant in water so as to be biased to the vertical in use, said flap portion also provided with chambers which contain at least one of air, gas or a foam, the buoyancy of said flap portion adjustable by flooding with water at least one of an air or other gas chamber.