Patent ID: 6132180
Filing Date: 2000-10-17
Classification: F03B,F05B,Y02E

Abstract:
An automatic pumping apparatus for pumping water by utilizing wave motion to effectuate a pumping stroke and a return stroke, said apparatus comprising:a stationary supporting frame having a pumping mechanism arranged to be actuated by the wave motion, anda reservoir tank for storing pumped water from the pumping mechanism, wherein the pumping mechanism comprisesat least one sink-and-float member provided on said supporting frame to move up and down in response to the wave motion,a connecting rod connected to said sink-and-float member,a piston positioned on and connected to the sink-and-float member via said connecting rod so as to move synchronously therewith during said pumping and return stokes,wherein both said sink-and-float member and said piston each have a cross sectional area and each piston hasa cross sectional area smaller than that of the corresponding sink-and float member,a cylinder supported by the stationary supporting frame to receive the piston and having a first end and an open second end communicating with water to be pumped by the piston during the pumping stoke, at least one pumping pipe connected to the first end of said cylinder, and at least one check valve to prevent any flow of water back from said reservoir tank toward the cylinder, each of the cylinders being positioned beneath and coaxially with the sink-and-float member such that said open second end is positioned above said first end and the piston is located within the cylinder and below the open second end.