ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,720, issued on June 23, was assigned to Jiangsu Yishou Machinery Technology Co. Ltd. (Yangzhou, China).
"Spindle automatic feed mechanism of drilling machine with self-adaptive electromechanical transmission" was invented by Guozheng Hou (Yangzhou, China) and Shen Qiao (Yangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spindle automatic feed mechanism of drilling machine with self-adaptive electromechanical transmission comprises a head housing assembly, an elevating axis assembly, and a large motor. The head housing assembly comprises a spindle assembly, a spindle sleeve, a reducing motor, a first worm, a first worm gear, and a turbi...