ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,597, issued on Dec. 30, was assigned to METSO USA INC. (Brookfield, Wis.).
"Spur wheel scraper" was invented by Brandon John Schuerman (York, Pa.), Wayne Eugene Myers (Mesa, Ariz.) and Steven E. Richardson (Gilbert, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure relates to a roller crusher including a first grinding roll and a second grinding roll, the first and second grinding rolls being arranged generally in parallel to each other and to define a crushing gap therebetween and drivable in a counter-rotating manner. The roller crusher includes a device of a first type for loosening granular material present on a crushing surfac...