ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,805, issued on Jan. 13, was assigned to Hilti AG (Schaan, Liechtenstein).
"Ring saw" was invented by Oliver Koslowski (Puergen, Germany), Bernhard Brehm (Calf, Germany), John Van Taack-Trakranen (Munich), Goran Golubovic (Buchloe, Germany) and Josef Schittl (Thueringen, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. The driving wheel is mounted in a bearing block so as to be rotatable abo...