ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,041, issued on Sept. 23, was assigned to HENGXIANG TECHNOLOGY INC. LTD (Hebei, China).
"Y-shaped packer" was invented by Meiqin Ma (Hebei, China), Jianbang Sun (Hebei, China), Xiaojuan Chen (Hebei, China), Chengang Shi (Hebei, China), Yasheng Zhang (Hebei, China), Ting Yin (Hebei, China), Yongxiao Lei (Hebei, China), Baoquan Liu (Hebei, China) and Jiande Tian (Hebei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Y-shaped packer includes a supporting part, fixedly sleeved on the outer wall of the inner barrel; a plugging part having an inner end part connected with the outer wall of the supporting part, and an outer end part tilted upward s...