ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,781, issued on March 18, was assigned to Da Hyun Lee (Daegu, South Korea).
"Tool holder with straight spray of cooling water for machine tool" was invented by Sung Geun Lee (Gimhae-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Tool Holder with Straight Spray of Cooling Water for Machine Tool includes: a body that provides a mounting space in which the tool is mounted, and is linked to the rotational motion of the machine tool; a housing unit that covers the outer surface of the body; a cap nozzle unit that is disposed to surround the outer circumferential surface of the tool while being connected to the lower side of the housing ...