ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,087, issued on Feb. 10, was assigned to Caterpillar Inc. (Peoria, Ill.).
"Excavator coupling system" was invented by Wolfgang Pirzer (Schwandorf, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An excavator coupling system for coupling a trailer hitch device to a dozer blade of an excavator. The excavator coupling system includes a keyhole component disposed on a front surface of the dozer blade of the excavator and a key component coupled with the trailer hitch device. The keyhole and key components are designed to forming a positive connection to couple the trailer hitch device to the dozer blade. The keyhole component is on the front of th...