ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,564, issued on Nov. 18, was assigned to MAKITA Corp. (Anjo, Japan).
"Core drill" was invented by Tomohiko Imae (Anjo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A core drill includes: a motor having a stator and a rotor, which is rotatable relative to the stator; a speed-reducing mechanism; an output shaft that, in the state in which a core bit is mounted thereon, is rotated by the rotational force of the rotor transmitted via the speed-reducing mechanism; and a battery-mounting part, on which a battery pack is mounted. A stator outer diameter, which is the outer diameter of a stator core of the stator, is 75 mm or more; and a stator lengt...