US Patent Issued to NIKKEN KOSAKUSHO WORKS on March 31 for "Tool holder and tool holding structure including the same" (Japanese, British Inventors)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,439, issued on March 31, was assigned to NIKKEN KOSAKUSHO WORKS LTD. (Osaka, Japan).

"Tool holder and tool holding structure including the same" was invented by Susumu Mikado (Osaka, Japan), Eisaku Nakai (Osaka, Japan) and Stephen Eckersall (South Yorkshire, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tool holder includes a holder body, a tapered collet, a first side lock bolt, a second side lock bolt, and a key. The key fits in a keyway of the collet, contacts the inner peripheral surface of a front hole, and contacts a recess formed in a rear end portion of a cutting tool inserted into a tool insertion hole of the collet."

The...