ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,460, issued on Jan. 28, 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: "A method for creating a weep hole is disclosed. The weep hole is drilled 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 mater...