Patent ID: 6450732
Filing Date: 2002-09-17
Classification: E02B,F03B,Y02A,Y02E

Abstract:
A caisson on a sea bed for absorbing wave energy, comprising:at least one internal air pocket; at least one vertical duct or conduit extending transversally along a whole portion of the caisson where the respective air pocket is present, wherein a lower portion of the caisson is filled with water, wherein the vertical duct extends upwards passing through a roof or upper wall of the caisson and communicates with the sea without an upper opening of said vertical duct reaching a surface of the sea and wherein said vertical duct extends downward without reaching a base of the caisson, where said vertical duct defines a lower opening; a height of the air pocket, starting from the roof of the caisson towards said base, being adjusted through means for feeding air to the air pocket or discharging air to the outside, so as to obtain a resonance condition in which a period of pressure fluctuations at the upper opening of the vertical duct is equal to a period of pressure fluctuations of the air pocket.