ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,670, issued on Jan. 28, was assigned to BURCKHARDT COMPRESSION AG (Winterthur, Switzerland).
"Piston ring for a piston compressor" was invented by Norbert Feistel (Ellikon a.d. Thur, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "Piston ring having a first annular body and a second annular body, which annular bodies, are arranged adjacent to and concentric with one another in the axial direction (A), the first annular body having a radially outwardly directed outer side, an upper and a lower flank and a radially inwardly directed inner side, the second annular body being designed as a segmented sealing ring having a plurality of sealing ...