ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,081, issued on Feb. 10.
"Radial bolt corrugated pipe mold and assembly for cementitious foundations, and method for stabilization" was invented by Allan P Henderson (Bakersfield, Calif.) and Charles L Purdy (Desert Hot Springs, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "In concrete pier, pier with collar, and caps with helical, rock and soil anchor foundations, a corrugation filler mold is assembled onto the outer end of horizontally extending radial bolts to be post-tensioned. The filler mold receives the bolt outer end through a hole and fits into the adjacent corrugation trough on the outside surface of a corrugated metal pipe (CMP) de...