US Patent Issued to Hongjia Wang on Sept. 1 for "Multi-step drill with asymmetric step profiles" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,211, issued on Sept. 1, was assigned to Hongjia Wang (Shanghai).

"Multi-step drill with asymmetric step profiles" was invented by Hongjia Wang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present drill point arrangement includes a first and second land defined by a first and second flute, with a first cutting tip and a second cutting tip formed on the first and second lands respectively. The first cutting tip being positioned a first radial distance and the second cutting tip being positioned a second radial distance, each measured from the axis of rotation. The second cutting tip is positioned next in cutting tip sequence to the fir...