ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,783, issued on Jan. 27, was assigned to MAKITA Corp. (Anjo, Japan).
"Hammer drill" was invented by Masanori Furusawa (Anjo, Japan), Hitoshi Iida (Anjo, Japan) and Kei Watanabe (Anjo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hammer drill includes a motor, a cylindrical tool holder, an intermediate shaft, a rotation conversion portion, a mode switching member, a restricting member, and an operation member. A first switch state of the restricting member by the operation member causes a first operation mode in which rotation of the tool holder and a striking motion of a striking portion allowed to be performed simultaneously in conjunction...