US Patent Issued to SANDVIK MINING AND CONSTRUCTION TOOLS, SANDVIK MINING AND CONSTRUCTION on July 1 for "Drill bit assembly comprising an expandable retaining sleeve" (Finnish Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,103, issued on July 1, was assigned to SANDVIK MINING AND CONSTRUCTION TOOLS AB (Sandviken, Sweden) and SANDVIK MINING AND CONSTRUCTION OY (Tampere, Finland).

"Drill bit assembly comprising an expandable retaining sleeve" was invented by Jouni Koskinen (Tampere, Finland) and Olivier Bruandet (Tampere, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hammer drill assembly is arranged for coupling to a drill string, wherein the drill bit is releasably attached to a driver sub via a retaining sleeve. The retaining sleeve includes a body that extends between a ring at its forward end and a plurality of tips at its rearward end. Also, methods of a...