ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,583, issued on Nov. 25.
"System for selectively closing a fluid channel" was invented by Jason J. Waldner (White, S.D.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system for selectively closing a fluid flow channel may include a gate apparatus with a gate structure and a guide frame assembly guiding movement of the gate structure between closed and open positions. The guide frame assembly may define a passage opening and include a gate threshold with a threshold plate having an opening perimeter forming the passage opening. The opening perimeter may be formed by an edge of the threshold plate, and the opening perimeter may have a lower perimete...