ALEXANDRIA, Va., June 5 -- United States Patent no. 12,278,069, issued on April 15, was assigned to Tae Jung Kim (Incheon, South Korea).
"Electromagnetic contactor for star-delta driving" was invented by Tae Jung Kim (Incheon, South Korea) and Dong Hee Kim (Incheon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to an electromagnetic contactor, and more particularly, to an electromagnetic contactor for star-delta driving, which is capable of rapidly and safely switching a connection of a 3-phase motor from a star connection to a delta connection and simplifying configurations of a connection circuit and an opening/closing device. According to the electromagnetic cont...