ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,465, issued on Oct. 14, was assigned to Petroleo Brasileiro S.A.-Petrobras (Rio de Janeiro, Brazil).
"Valve driving with mechanical delay" was invented by Mateus Henrique Ferreira De Araujo (Rio de Janeiro, Brazil).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides an electro-pneumatic arrangement to act as a mechanical timer (delay) in ON-OFF valve actuators. The arrangement comprises: two directional valves (1 and 2) with three ways and two positions, actuated by solenoid; a three-way, two-position directional valve (3), actuated by a pneumatic pilot; a set of compressed air conditioning with filter and pressure regulatin...