ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,403, issued on Sept. 16, was assigned to Illinois Tool Works Inc. (Glenview, Ill.).
"Dual flap pressure relief valve" was invented by Erin M. Daly (Ontario, Canada), Michael R. Markie (Roseville, Mich.) and Ganesh P. Chebrolu (Farmington Hills, 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 a flow of air through the pressure vent valve. When a sufficient pressure occurs, the valve...