Patent ID: 7759813

Claim:
A gravity wave power generation apparatus in a sea area having stream current such as ocean current and tidal current, comprising: a weight mass provided with a rotation axis (shaft) on a top thereof; a floating body that moves in an up and down motion according to swell on a surface of the ocean with a buoyant body provided with a bearing for fitting in the rotation axis; a normal rotation conversion generator for converting a reverse motion occurring on said rotation axis that is fitted into the bearing of the floating body to a normal rotating motion by a one-way clutch or a ratchet mechanism; a mooring member for fastening an anchor that is established at bottom of the ocean by using a wire rope and a buoy at a connecting point of said floating body and said weight mass; a rotation blade capable of generating a seesaw motion (in an ocean current direction) on said weight mass by a backward motion of said weight mass by receiving a strong ocean current resistance when the waves (swell) of the sea area are small and a returning forward motion of said weight mass by a restored force based on the gravity when the ocean current resistance is weak; and a weight mass weight adjusting chamber for adjusting to the weather conditions of the sea area, establishing a chamber inside the bottom part of said weight mass in the ocean to supply air or ocean water, thereby changing the weight of said weight mass.