ALEXANDRIA, Va., March 5 -- United States Patent no. 12,243,684, issued on March 4, was assigned to NIDEC INSTRUMENTS Corp. (Nagano, Japan).
"Actuator" was invented by Akira Mori (Nagano, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An actuator causes vibration of a movable body by a magnetic drive mechanism. The movable body includes: a support shaft having an outer circumferential surface fixed with a magnet; a cup-shaped first magnetic member fixed to an end surface of the magnet in an axial direction; and a second magnetic member fixed to an opposite side of an end plate of the first magnetic member from the side of the magnet. A weight adjustment section in the second magnetic member is a throug...