ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,720, issued on Oct. 7.

"Rotary piston compressor" was invented by Florian Karl Ausserer (Dornbirn, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rotary piston compressor for compressing gas, in particular carbon dioxide, in which a side wall face of a housing side wall and a respective planar sealing face of a respective housing cover enclose a working chamber and a rotary piston is rotatably mounted in the working chamber on an eccentric. A respective planar-seal receiving channel is formed in the piston bases of the rotary piston and a planar seal is arranged in each of the planar-seal receiving channels. To press the seal surface of the...