ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,249, issued on June 2, was assigned to Kaiser AG (Schaanwald, Liechtenstein).
"Walking excavator" was invented by Rene Geiger (Au, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A walking excavator (1) having a superstructure (2) and an undercarriage (29), and a cab (3) disposed on the superstructure (2), and four walking legs (4) pivotably disposed on the undercarriage (29), and an excavator arm (5) which is pivotably mounted on the superstructure (2) and to which an excavating tool (6), in particular an excavator bucket, is fastened or able to be fastened. A dual-action differential cylinder (7) pivots the excavator arm (5) up and down ...