ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,157, issued on Oct. 14, was assigned to Jiangsu XCMG Construction Machinery Research Institute Ltd. (Jiangsu, China).
"Rotary frame and grade" was invented by Hongfeng Ma (Jiangsu, China), Penglong Hou (Jiangsu, China) and Le Gao (Jiangsu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a rotary frame and a grader, and relates to the field of a grader. The rotary frame includes: a rotary ring, provided with a recessed portion and an opening; a first connecting piece fixed at the periphery of the rotary ring, one end of the first connecting piece being attached to the periphery of the rotary ring and the other en...