US Patent Issued to Volvo Construction Equipment on Sept. 23 for "Self-balancing uni-drum compactor" (Polish, American Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,675, issued on Sept. 23, was assigned to Volvo Construction Equipment AB (Eskilstuna, Sweden).

"Self-balancing uni-drum compactor" was invented by Lukasz Krzysztof Rembisz (Medlow, Poland), Fares Beainy (Mechanicsville, Pa.) and Rafal Robert Cisowski (Jelcz-Laskowice, Poland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surface compactor machine includes an unsprung mass including a cylindrical drum and a cylindrical spool disposed within the cylindrical drum, and a sprung mass rotationally coupled to the cylindrical spool. The sprung mass has a center of gravity that is lower than the center of gravity of the unsprung mass when the surface comp...