ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,942, issued on Aug. 5, was assigned to Gestigas S.L. (Madrid).
"Energy storage system" was invented by Ignacio Gonzalez Alonso (Madrid).
According to the abstract* released by the U.S. Patent & Trademark Office: "An energy storage system (1), which comprises a weight (2) hanging from a cable (3, 10) connected to a first rotation shaft (5) mechanically coupled to a second rotation shaft (6) of a motor-generator assembly (7) connected to the power grid. When there is a surplus of electrical energy in the grid, the motor-generator (7) consumes energy, operating as a motor to rotate the first shaft (5) in a winding direction of the cable (3, 10), whereas, when there is a shortage of e...