US Patent Issued to Applied Materials on April 15 for "Self-adjustable variable orifice check valve for back pressure reduction" (California Inventors)

ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,344, issued on April 15, was assigned to Applied Materials Inc. (Santa Clara, Calif.).

"Self-adjustable variable orifice check valve for back pressure reduction" was invented by Muhannad Mustafa (Milpitas, Calif.) and Sanjeev Baluja (Campbell, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Variable orifice check valves comprising a flange with a guide pin, spring and movable plate are described. The flange has a body with at least one guide pin opening in the top surface. A guide pin is positioned within the at least one guide pin opening and a spring is positioned around the guide pin. The movable plate has an opening and slides along the gui...