Patent ID: 7909536

Claim:
A wave energy point absorber device for harnessing energy from sea waves, the device comprising a surface piercing float which moves with the passing of waves, the surface piercing float being linked through a power take off to a streamlined submerged body having an entrapped volume of sea water, the submerged body including a cylindrical compartment running the length of the submerged body, but sealed off from the remaining portion of the submerged body, the cylindrical body being configured to be entrap volumes of liquid therein so as to provide an entrapped mass within the cylinder operably resisting the acceleration and hence rate of response of the linked surface piercing float to the driving forces caused by the passing wave in both rising and sinking motions, wherein the entrapped volume of seawater within the submerged body may be adjusted in situ, wherein the compartment may be open at both ends such that the compartment will entrap no liquid thereby having no inertial mass, the device comprising a valve provided above by means of a narrow bore extension open to the atmosphere via a surface float, activation of the valve providing a variance of the entrapped mass contained within the compartment.