ALEXANDRIA, Va., June 10 -- United States Patent no. 12,292,128, issued on May 6, was assigned to Georg Fischer Rohrleitungssysteme AG (Schaffhausen, Switzerland).
"Pressure control valve" was invented by Dirk Petry (Feuerthalen, Switzerland), Oliver Trefz (Bonndorf, Germany) and Flavio Cantoni (Neuhausen, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pressure control valve for controlling the pressure of gaseous and liquid media in pipelines, preferably in the drinking water field, containing: a main valve to which the pipeline is connected, wherein the main valve has a main valve housing, a guide cylinder, a valve element, channels for conducting the medium and a spring element, the valve el...