Abstract: A wave energy converter to float in water, including a first body assembly having a first body and a sub-body rigidly connected to the first body by an assembly arm and a second body wherein the first body assembly and the second body being connected to one another via a first arm, the first arm being pivotally connected to at least one of the first body assembly and second body, the first body assembly and the second body also being connected to one another via a linkage that, via movement of at least a part of that linkage, allows for movement of the first body assembly and second body relative to one another in an anti-phase manner, and separation between the first body and the sub-body provides for tunability to tune the wave energy converter for use in a particular wave field.

Abstract: A wave energy converter, configured to float in water, comprising: a first body assembly, comprising a first body (30), configured to float in water and a sub-body (120) rigidly connected to the first body (30) by an assembly arm (122), the sub-body (120) being configured to float in water; and a second body (34), configured to float in water; the first body assembly and the second body being connected to one another via a first arm (36), the first arm being pivotally connected to at least one of the first body assembly and second body; the first body assembly and the second body also being connected to one another via a linkage (90, 100, 110) that, via movement of at least a part of that linkage, allows for movement of the first body assembly and second body relative to one another in an anti-phase manner; properties of the wave energy converter being tuneable, to tune the wave energy converter for use in a particular wave field.

Abstract: In a wave energy apparatus vertical movement of a float suspended in a body of water drives a power generator. Motion of the float is controlled by taking advantage of the movement of water on the upper surface of the float body. The upper surface can be used to generate hydrodynamic forces acting downwardly against the upward forces acting on the lower surface of the float body, effectively damping its movement in the presence of waves that might otherwise provoke undesirably large vertical movement of the float. The movement of water onto the upper surface can be controlled by adjusting the depth at which the float is suspended.

Abstract: Apparatus for extracting waves comprises a float (6) coupled to a drive mechanism (2) such that vertical movement of the float can be used to generate power. The float is freely suspended in a body of water, but subject to a flexible restraint (10, 12, 14) system for restricting its lateral movement. The restraint system can itself involve a suspended mass (10), which may be another float (6) coupled to the same or a different drive mechanism (2).

Abstract: Apparatus for extracting energy from waves comprises a float device coupled to a shaft such that vertical movement of the float devices drives the shaft. Movement of the float device is generated by the wave motion, and the mass of the float device is such that its natural frequency of vertical oscillation is substantially resonant with the frequency of a sea wave. The mass of the float device can be adjustable to achieve this.