ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,257, issued on Feb. 24, was assigned to Weir Minerals Netherlands, B.V (Netherlands).
"Valve" was invented by Johannes Stroeken (Roermond, Netherlands) and Frank Ummenthun (Venlo, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A valve (18.1) includes a first and second port (50, 52) connected by a flow path to allow medium containing solid particles to pass therethrough. The valve also includes a valve seat (61), a closure unit (62), and a cavity (85) configured to receive at least part of the closure unit. The closure unit further comprises (i) a barrier piston (74) inhibiting the flow of solid particles from the second port when the cl...