ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,545, issued on Nov. 4, was assigned to Sandvik Mining and Construction G.m.b.H. (Zeltweg, Austria).
"Cutting apparatus" was invented by Martin Gimpel (Leoben, Austria), Hubert Kargl (Gaal, Austria), Bernhard Ebner (Knittelfeld, Austria) and Guenther Staber (Murau, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutter head for excavating hard rock materials in rock face includes a carrier attachable to a cutter arm of a cutter machine and a drive shaft rotatably supported by the carrier. The drive shaft is rotatable about a drive axis and has at one end a support portion for mounting disc cutters. A plurality of disc cutters are mounted on t...