ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,352, issued on Aug. 19, was assigned to Edwards Japan Ltd. (Yachiyo, Japan).
"Vacuum exhaust apparatus and vacuum pump used therein" was invented by Yoshinobu Ohtachi (Yachiyo, Japan), Yasushi Maejima (Yachiyo, Japan) and Tsutomu Takaada (Yachiyo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum exhaust apparatus capable of accurately and rapidly adjusting the pressure in an exhaust chamber and a vacuum pump used therein are provided. A vacuum pump includes a rotor that rotates to exhaust an exhaust chamber and a casing having an inlet port. A valve is located between the inlet port of the vacuum pump and an outlet port of the exhaust c...