ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,723, issued on Dec. 2, was assigned to Concore BV (Helmond, Netherlands).
"Weep-hole drilling" was invented by C.G. van Veldhuisen (Geboortedatum, Netherlands) and Sven Vallgren (Helmond, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for creating a weep hole in an uncured, concrete, hollow core structural component having one or more external surfaces and one or more internal surfaces. The weep hole is drilled using a drilling apparatus comprising a drill, a rotating drill bit with an internal fluid passageway, a power source, and a pressurized fluid source. Loose, uncured concrete material deposited near the weep hol...