ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,072, issued on July 29.
"Rotational force amplifier" was invented by Hyo Keun Choi (Gyeonggi-do, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A torque amplification device for amplifying torque of a power transmission shaft and transmitting the amplified torque to a driven shaft according to an embodiment includes one or more eccentric amplification parts including a first rotation part, to the center portion of which a shaft in the power transmission shaft direction is connected and which is eccentrically connected to a shaft facing the driven shaft in a driven shaft direction; and an output end amplification part which is connected t...