ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,786, issued on Jan. 27, was assigned to Koki Holdings Co. Ltd. (Tokyo).
"Work machine" was invented by Hiroyuki Tagami (Ibaraki, Japan) and Naoto Ichihashi (Ibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A work machine includes: a motor; an output shaft, rotated by driving of the motor; a first fan, fixed to and rotating integrally with the output shaft; a second fan, located on one side of the first fan in an axial direction of the output shaft, fixed to and rotating integrally with the output shaft; and a rectification member, accommodating the first and second fans, and, when the output shaft rotates to one side in a rotation direc...