US Patent 7896576 Enhanced wave power generators

Systems are disclosed for generating electricity from sea waves, that include a float (12) that lies at the sea surface (14) and moves up and down with the waves. A motion resist element (30) moves horizontally with the float but resists vertical movement. Electricity-generating apparatus (52, 54) is coupled to the float and resist element for generating electricity as the float moves vertically relative to the resist element.