Patent ID: 8330287

Claim:
A device, comprising: a float comprised of first and second floating shells pivotably attached to one another at a first end and releasably attachable to one another at an opposite second end; a vertical guiding device anchored in the sea bed with guiding means, the first and second floating shells of the float releasably attached to one another so as to encircle the guiding device within an axial opening extending between the two shells; and conversion means for converting relative displacements between the float and the guiding device into usable energy, wherein: the guiding device comprises at least two opposite rolling paths; the guiding means comprise at least two wheels or rollers mounted so as to rotate around two respective axes of rotation securely attached to said float and radially mobile relatively to the guiding device, both of these wheels or rollers being positioned so as to be able to respectively roll on said rolling paths; the conversion means comprise means for converting the rotary movement of the wheels or rollers into usable energy; the float comprises means allowing the wheels or the rollers to exert an antagonistic pressure on the rolling paths, so that with said wheels or said rollers it is possible to both ensure: guiding of the float on the guiding device; and their driving into rotation during displacements of said float.