US Patent Issued to C.M.E. Blasting & Mining Equipment on June 2 for "Grinding tool for grinding buttons on a rock drill bit" (Canadian Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,158, issued on June 2, was assigned to C.M.E. Blasting & Mining Equipment Ltd. (Oakville, Canada).

"Grinding tool for grinding buttons on a rock drill bit" was invented by Bo Thomas Sjolander (Oakville, Canada) and Bjorn Sjolander (Oakville, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A grinding cup for detachable connection to an output drive shaft of a grinding machine for grinding buttons on drill bits or cutters. The grinding cup has top and bottom surfaces, a lower grinding section, and an upper body section co-axial with the lower grinding section to form the grinding cup with a centrally disposed recess formed in the bottom surface o...