ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,398, issued on Aug. 19, was assigned to AAC Acoustic Technologies (Shanghai) Co. Ltd. (Shanghai).
"Planetary roller screw linear actuator" was invented by Chunjiang Li (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A planetary roller screw linear actuator includes a shell with a receiving cavity, a driving assembly fixed in the receiving cavity, and a rotor received in the receiving cavity and driven by the driving assembly to rotate. The rotor includes a hollow shaft rotatably connected to two ends of the shell, a planetary screw rotating body in transmission connection to the shaft, and an extension rod in transmission connection to the ...