ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,894, issued on Nov. 18, was assigned to PRAK Energy Inc. (McLean, Va.).
"Energy storage and delivery system with a weight elevation" was invented by Petr Kropotin (Almaty, Kazakhstan) and Ruslan Sokolov (Almaty, Kazakhstan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An energy storage and delivery system is provided. A gripper couples to a load and lifts the load vertically from a second position to a first position, or lowers the load from the first position to the second position. A trolley horizontally moves the gripper along the first position. A rope is operably coupled to the gripper and the trolley to allow the trolley to move horizontally ...