Comprising a chamber, inlet and outlet valves upstream and downstream the chamber

Official title: {comprising a chamber, inlet and outlet valves upstream and downstream the chamber and means for alternately sucking particulate material into and removing particulate material from the chamber through the valves (conveying material in bulk by using a combination of gas pressure and suction B65G53/28; pumps in general F04B; apparatus for repeatedly measuring and separating a predetermined volume of fluent solid material from a supply or container G01F11/00)}

B05B7/1459 (Comprising a chamber, inlet and outlet valves upstream and downstream the chamber) appears on 82 US grants and 95 published applications in this corpus.