ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,396, issued on June 24, was assigned to SHANDONG UNIVERSITY (Jinan, China).
"Vibration-damping hydraulic tool holder based on multi-cavity structure" was invented by Kai Guo (Jinan, China), Jinlong Guo (Jinan, China) and Jie Sun (Jinan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vibration-damping hydraulic tool holder based on a multi-cavity structure is provided. The vibration-damping hydraulic tool holder based on the multi-cavity structure includes a gripper, one end of the gripper is provided with an installation groove, the installation groove is filled with a sealing sleeve, the center of the sealing sleeve is provided with a clamp...