ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,000, issued on March 17, was assigned to SAMHONGSA Co. LTD. (Seoul, South Korea).
"Hydraulic-pneumatic apparatus" was invented by Ki Cheol Lee (Incheon, South Korea) and Jin Hyung An (Incheon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An aspect of the present disclosure provides a hydraulic-pneumatic apparatus including a cylinder assembly including a spindle with a hollow inside, a hollow cylinder portion, and a piston rod capable of reciprocating inside the hollow cylinder portion, and inserted through an inlet of the spindle, a flange portion surrounding the piston rod, disposed on an inlet side of the cylinder portion, and cont...