ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,846, issued on Dec. 30, was assigned to QCS QuickChangeSystem EMUK GmbH (Landau, Germany).
"Quick-change unit and quick-change system" was invented by Salvatore Di Stefano (Billigheim-Ingenheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quick coupler for construction machines. An embodiment of the quick coupler comprises a housing with two opposing longitudinal walls, two opposing transverse walls, a top side, a bottom side, and a block cylinder inside the housing. The quick coupler may also comprise a locking device with a locking bolt and a drive device. The locking bolt protrudes from one of the two transverse walls in a locked pos...