ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,767, issued on Dec. 2.
"Excavation and shoring equipment" was invented by Ted R. Dimitroff (Columbia, Mo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A reaming tool forms a hole in the ground with a sidewall and a floor, and a deepened channel around the perimeter of the floor adjacent to sidewall. Fluid is provided during excavation to form a slurry to hold the sidewall and prevent cave-in of material into the hole. After the hole reaches a desired depth, the reaming tool is removed, and a shoring wall is inserted into the hole through the slurry and seated in the perimeter edge channel. The shoring wall includes vertical tubes for connection to ...