ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,320, issued on June 3, was assigned to Sulzer Management AG (Winterthur, Switzerland).
"Energy storage system" was invented by Karel De Raeve (Winterthur, Switzerland), Thomas Welschinger (Radolfzell, Germany) and Bartosz Kus (Winterthur, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An energy storage system includes a vessel for storing water, an energy conversion device, and a connection line connecting the vessel with the energy conversion device. The energy conversion device includes first and second housings, a pump turbine in the first housing, and a motor generator in the second housing. The pump turbine includes a first shaft and...