ALEXANDRIA, Va., July 23 -- United States Patent no. 12,366,237, issued on July 22.

"Process for internally cooling an inline compressor" was invented by Wayne A Wolf (San Marcos, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for internally cooling an inline compressor involves the steps of providing a compression chamber between an outer cylinder and an intermediate cylinder and a drive chamber between the intermediate cylinder and a piston; admitting gas into the compression chamber; pumping drive fluid through the piston into the drive chamber to extend the intermediate cylinder and compress the compression chamber and the gas in the compression chamber; allowing heat from the compressed ...