US Patent Issued to MITSUI KINZOKU ACT on May 5 for "Door opening and closing device" (Japanese Inventor)

ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,279, issued on May 5, was assigned to MITSUI KINZOKU ACT Corp. (Kanagawa, Japan).

"Door opening and closing device" was invented by Osamu Kawanobe (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A door opening and closing device includes a motor which generates drive power for a door in an opening and closing direction of the door, a door position sensor which detects an opening and closing position of the door, and a controller which controls the motor based on the opening and closing position. The motor includes a stator having at least three-phase coils and a rotor. The motor generates the drive power when the rotor rotates with res...