Patent ID: 8581433

Claim:
A wave power plant comprising: a buoy arranged at or in a pool of water to be set into motion by movements of the water in the pool of water, wherein the buoy obtains movements, which alternate between a first movement in one direction and a second movement in another direction being different from the first direction, a driveshaft, which is rotatably mounted to the buoy, or to a device arranged to give a force counteracting movements of the water in the pool of water, a first elongated means, which both is coupled to a device arranged to give a force counteracting the movements of the water in the pool of water or to the buoy, respectively, and is coupled to the driveshaft, an electric generator, which is coupled to the driveshaft and includes two parts that are rotatable in relation to each other, a first part and a second part, and an energy accumulation device, the buoy, the first elongated means, the device arranged to give a force counteracting the movements of the waves, the driveshaft and the energy accumulation device being coupled to each other, so that the coupling between the first elongated means and the driveshaft makes, substantially for first movements of the buoy, the driveshaft rotate in only one direction and thereby drives said two parts of the electric generator to rotate in relation to each other in a first rotational direction and generate electric current and thereby also supply the energy accumulation device with energy, and wherein the energy accumulation device is arranged to drive, substantially for second movements, of the buoy, said two parts of the electric generator to rotate in the same first direction in relation to each other and thereby to generate electric current having the same polarity as when the driveshaft drives said two parts of the electric generator to rotate in relation to each other.