Patent ID: 7500405

Claim:
A fluid flow apparatus comprising, in combination, a conduit including a removable and replaceable section having a peripheral wall with an interior surface for conveying fluid therethrough in a given direction, said conduit section having relative to the direction of fluid flow an upstream end and a downstream end, a fluid flow displacement member in said conduit section having in relation to the direction of fluid flow an upstream end and downstream end, said displacement member being of smaller size than said section and having between the ends thereof sloped wall means forming a periphery on said member for deflecting the fluid to flow through a region defined between the periphery of said displacement member and the interior surface of said section, a tube extending through the wall of said conduit section and having a portion extending substantially axially of said section in the downstream direction, said displacement member having a substantially axial passage therethrough mating with said portion of said tube such that fluid communication is established between the exterior of said conduit section and a location at or adjacent the axis of said conduit section at or adjacent to the downstream end of said displacement member, cooperative means for removeably and replaceably mounting said displacement member in said section whereby said displacement member may be removed and replaced by a different displacement member to accommodate a different range of flows through said section; said cooperative means being located between said portion of said tube and said displacement member; a first coupling member on said portion of said tube; and a second mating coupling member within said axial passage in said displacement member, said first and second coupling members inter-engaging with one another to secure said displacement member to said tube.