ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,693, issued on Oct. 27.
"Pumped-storage power plant, method for operating a pumped-storage power plant, and pumped-storage system" was invented by Robin Krack (Sinntal-Jossa, Germany) and Udo Gartner (Sinntal-Sannerz, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pumped-storage power plant may include a working cylinder partially submerged in a working fluid reservoir having an upper fluid compartment above a fluid level of the working fluid reservoir and a lower fluid compartment below the fluid level, a buoyant piston movably guided in the direction of gravity relative to the working cylinder and which seals off the upper fluid compartm...