ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,562,393, issued on Feb. 24, was assigned to Robert Bosch GmbH (Stuttgart, Germany).
"Method for operating a fuel cell system, shutoff valve and fuel cell stack" was invented by Friedrich Howey (Ditzingen, Germany) and Dirk Schnittger (Ludwigsburg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for operating a fuel cell system, in which method a supply of air to a fuel cell stack (20) is interrupted intermittently, in particular in the event of a standstill of the system, by means of a pressure-controlled shutoff valve (1), which comprises a valve element (4), which valve element can be moved back and forth betwe...