ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,032, issued on March 17, was assigned to MIKUNI Corp. (Tokyo).
"Electromagnetic actuator and valve device" was invented by Satoshi Sekiguchi (Kanagawa, Japan) and Shoichi Ishiguchi (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electromagnetic actuator includes: a movable element 50, reciprocating along an axis S; a coil 122 for excitation; a shaft 60, fixed to the movable element; a first inner yoke 70, movably receiving the movable element; a second inner yoke 80, attracting the movable element through energization of the coil and movably receiving the shaft; and an outer yoke 90, 100, surrounding the coil and bonded to the fi...