ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,233,504, issued on Feb. 25, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).
"Angle grinder" was invented by Jian Gang Qu (Dongguan, China), Zhi Hai Liu (Zaoyang, China) and Ming Cong Chen (Hua Zhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An angle grinder comprises a motor and an output member to which a grinding disc is attachable. The output member defines an output axis. A drive shaft is configured to transfer torque from the motor to the output member. A braking disc is coupled to the drive shaft and a braking pad is moveable in a direction transverse to the drive axis between a first braking pad position and a second ...