Patent ID: 6457307
Filing Date: 2002-10-01
Classification: F03B,Y02E

Abstract:
A system for conversion of hydrostatic pressure variations generated by off-shore sea waves, into useful energy, comprising:a casing hermetically sealed and submerged in the sea underneath the waves level; means for generating a sub-pressure within the casing; at least one wall of the casing being adapted to become displaced inwards and outwards of the casing under variable hydrostatic pressure applied thereon; a first cylinder-and-piston system having a piston coupled to the said one wall to move in unison therewith; valve means associated with the first system so that on every stroke of the piston a quantity of a fluid supplied to the cylinder of the first system is compressed out of the cylinder into a pressurized fluid vessel; a second cylinder-and-piston system having a piston rigidly coupled to the piston of the first system to move in unison therewith; means for controllably varying the effective volume of the cylinder of the second system in relation with the force applied by said one wall on the piston of the first system; and means for converting the energy of the pressurized fluid stored in the pressurized fluid vessel into useful energy.