ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,954, issued on March 18, was assigned to L&T MINING SOLUTIONS OY (Kuorevaara, Finland).
"Method and a drill bit for sealing a blasthole wall" was invented by Lasse Tanskanen (Kuorevaara, Finland) and Timo Tanskanen (Kuorevaara, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a drill bit (11) for sealing a blasthole wall (31) are disclosed. The method comprises drilling a blasthole to a rock by a drill bit (11) connected to a hollow drill rod (10); flushing the drill bit (11) and the hollow drill rod (10) via at least one flushing orifice (19); providing a sealant to the hollow drill rod (10); and releasing the sealant to the bla...