ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,598, issued on Oct. 14, was assigned to LIH YANN INDUSTRIAL Co. LTD. (Taichung, Taiwan).
"Liquid filling device" was invented by Po-Lin Liao (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid filling device is provided, including: a barrel, a piston assembly and a force accumulating assembly. The barrel defines an axial direction and includes a liquid storage space and a through hole communicated with the liquid storage space. The piston assembly includes a piston and a push rod connected with the piston, and the piston is axially movable and is disposed in the liquid storage space. The force accumulating assembly is disposed ...