US Patent Issued to Twinbird on Oct. 7 for "Free-piston Stirling engine" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,911, issued on Oct. 7, was assigned to Twinbird Corp. (Niigata, Japan).

"Free-piston Stirling engine" was invented by Junichi Kamoi (Niigata, Japan) and Kazuya Kondo (Niigata, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a free-piston Stirling engine that can be easily manufactured by reducing manufacturing processes. A free-piston Stirling refrigerator comprises: a piston capable of reciprocating inside a first cylinder; a first leaf spring for controlling the reciprocating motion of the piston; a connection body for connecting the piston to the movable portion of the first leaf spring; a support arm portion for supporting the fi...