US Patent Issued to Illinois Tool Works on Jan. 13 for "Pressure relief valve with installation indicator" (Michigan Inventor)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,052, issued on Jan. 13, was assigned to Illinois Tool Works Inc. (Glenview, Ill.).

"Pressure relief valve with installation indicator" was invented by Michael R. Markie (Roseville, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pressure vent valve for ventilation of the interior of a motor vehicle, with a frame with at least one sealing surface and with at least one flexible valve flap mounted on the frame. In an idle position, the valve flap assembly abuts the sealing surface to prevent airflow through the pressure vent valve. When a sufficient pressure occurs, the valve flap assembly assumes an open position lifted from the sealing surface...