US Patent Issued to TUNGALOY on Sept. 22 for "Drilling tool" (Japanese Inventor)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,741,324, issued on Sept. 22, was assigned to TUNGALOY Corp. (Fukushima, Japan).

"Drilling tool" was invented by Hiroya Shikama (Iwaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "It is possible to reduce shoulder parts from being damaged while suppressing an increase in cutting resistance or abrasion of edges at a time of machining.A drilling tool for drilling machining includes: at least one major cutting edge; second cutting edges that are provided on an outer side of a tool radial direction of the major cutting edge; third cutting edges that are provided on the outer side of the tool radial direction of the second cutting edges; a first hon...