ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,448, issued on Nov. 3, was assigned to JOSEPH VOEGELE AG (Ludwigshafen/Rhein, Germany).
"Road finishing machine with leveling cascade control" was invented by Stefan Simon (Neuhofen, Germany), Philipp Stumpf (Heidelberg, Germany), Ralf Weiser (Ladenburg, Germany) and Martin Buschmann (Neustadt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A road finishing machine with a screed for producing a paving layer on a subsoil includes a leveling system for height adjustment of the screed for compensating for irregularities in the subsoil. The leveling system includes a cascade control having either a central control loop between outer and inner con...