ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,086, issued on Dec. 30, was assigned to Hilti AG (Schaan, Liechtenstein).
"Magnetic coupling between power tool motor shaft and fan wheel" was invented by Michael Lacher (Schwabmuenchen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power tool is provided having a motor and a motor shaft, wherein a fan wheel in the power tool is designed to generate an air flow for cooling the motor. The power tool provides a coupling formed magnetically between the fan wheel and the motor shaft such that the motor shaft drives the fan wheel in a rotary movement with a speed that is less than a speed of the motor shaft. As a result of the magnetic couplin...