US Patent Issued to Stein Seal on March 31 for "Circumferential sealing assembly with duct-fed hydrodynamic grooves" (Pennsylvania Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,638, issued on March 31, was assigned to Stein Seal Co. (Kulpsville, Pa.).

"Circumferential sealing assembly with duct-fed hydrodynamic grooves" was invented by Thurai Manik Vasagar (Hatfield, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A circumferential sealing assembly for use between a lower-pressure oil side and a higher-pressure gas side is presented. The assembly includes a sealing ring interposed between either a rotatable runner or a sleeve and a housing within a turbine engine. Ducts communicate the hot gas into grooves to form a thin film between the ring and the runner or the sleeve. Embodiments include grooves on the runner and d...