ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,837, issued on May 13, was assigned to TECHTRONIC CORDLESS GP (Anderson, S.C.).
"Submersible pump" was invented by Gerardo Quintanilla Avila (Dongguan, China) and Wai Chung Lee (Kwai Chung, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A submersible pump, comprising: a casing, having accommodated therein a pumping unit and a drive unit for driving the pumping unit; a base, defining a pump inlet; and a float control unit. The float control unit comprises: a float, having at least one magnet; and a float chamber housing, defining a float chamber in which the float is movable up and down. The float chamber has at least one opening which connects...