ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,808, issued on April 29, was assigned to NingBo Poolstar Pool Products Co. Ltd. (Ningbo, China).
"Underwater cleaning robot" was invented by Liang Chen (Ningbo, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An underwater cleaning robot, including a main body provided with an accommodating chamber inside, a suction motor, and a roller brush assembly. A bottom of the main body is provided with a suction port. The suction motor is arranged in the chamber, and generates suction force to draw wastes into the chamber through the suction port. The roller brush assembly includes a roller brush motor arranged in the chamber, a connecting part, and a ro...