US Patent Issued to Hilti on March 18 for "Self-drilling expanding anchor bolt" (Chinese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,101, issued on March 18, was assigned to Hilti AG (Schaan, Liechtenstein).

"Self-drilling expanding anchor bolt" was invented by Gaisheng Koh (Shanghai), Liang Lu (ZJ, China) and Linda Xu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A self-drilling expanding anchor bolt, including a drill bit for drilling, an anchor rod connected to the drill bit, and an expanding sleeve surrounding the anchor rod, the anchor rod having an expansion cone at a first end adjoining the drill bit, having a neck region behind and contiguous with the expansion cone, and having a threaded segment at a second end of the neck region remote from the drill bit, wh...