Patent ID: 8695523

Claim:
An apparatus for reducing pitching and rolling motions of a vessel, the apparatus comprising: a plurality of buoyant members vertically slidable; a plurality of hydraulic cylinders each connected to an upper end of one of the buoyant members to receive moving forces of the buoyant members that ascend with an action of waves; and a hydraulic connection line unit being a single pipe member which is connected to each of the plurality of hydraulic cylinders and through which hydraulic pressure is guided and carried among the plurality of hydraulic cylinders, wherein the hydraulic connection line unit is configured to supply hydraulic pressure, which is generated concurrently with a rise of at least one first hydraulic cylinder among the plurality of hydraulic cylinders when at least one corresponding first buoyant member among the plurality of buoyant members located at a hill of a wave ascends, to at least one second hydraulic cylinder among the plurality of hydraulic cylinders located at a dale of the wave, for lowering at least one corresponding second buoyant member among the plurality of buoyant members to cause a buoyant force of the vessel to increase, thereby restricting shaking of the vessel.