ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,940, issued on June 23, was assigned to REDPATH DEILMANN GMBH (Dortmund, Germany).
"Shaft excavator" was invented by Frank Kristek (Herdecke, Germany), Patrick Jakob (Lumen, Germany) and Uwe Ruping (Kamen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A working stage 1 is used for the installation of fixtures in vertical shafts in mining and tunnelling, which is suspended from one or more ropes and having at least one working level 2, 3, 4. A height-adjustable shaft excavator 5 is provided underneath working stage 1 for unloading and/or removing blasted debris."
The patent was filed on July 21, 2022, under Application No. 18/687,131.
*For...