ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,431, issued on Oct. 7, was assigned to HITACHI ASTEMO LTD. (Ibaraki, Japan).
"Electromagnetic actuator device and suspension device provided with same" was invented by Ryosuke Hoshi (Tokyo), Yasuaki Aoyama (Tokyo) and Nobuyuki Ichimaru (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electromagnetic actuator device reduces pulsation and improves thrust, and includes: a magnet; and an armature that moves relative to the magnet. The armature includes: a plurality of teeth formed in a relative movement direction; a plurality of slots between the plurality of teeth; a yoke connecting the plurality of teeth; and a winding around the p...