Patent ID: 7726123

Claim:
A tension-moored wave energy device, in which the device includes: (a) multiple chambers, the lower end of each chamber being open to water above the wave base when operating in resonance to generate energy, the wave base being the maximum depth at which a wave's passage causes significant water motion, and the upper end of each chamber being connected via ducting to an air turbine; (b) each chamber defining an air flow path; in which at least some chambers differ from others by being designed to resonate at different incident wave frequencies, irrespective of the orientation of the device in relation to incident waves; and in which the device floats but is tension-moored to resist heaving in response to wave action such that when the device is operating in resonance a passing wave has no substantial effect on the absolute vertical position of the device, and causes the level of water in each chamber to rise relative to the device.