Patent ID: 7832283

Claim:
A fluid flow meter having a conduit defining a longitudinal axis for conveying fluid therethrough in a given direction, a tube extending through the wall of the conduit and having a tubular guide positioned substantially along the axis of the conduit in the downstream direction, and a fluid flow displacement member in the conduit having, in relation to the direction of fluid flow, an upstream end and an downstream end, the displacement member being mounted at its upstream end substantially coaxially on said tubular guide and having between the ends thereof a sloped wall forming a periphery of the displacement member for deflecting the fluid to flow through a region defined between the periphery of the displacement member and an interior surface of the conduit, characterized in that the displacement member comprises a hollow frustum having an exterior wall and an interior wall, the exterior wall slopes outwardly in the downstream direction from adjacent to the axis of the conduit to a downstream peripheral edge spaced from an interior surface of the conduit such that the fluid flows between the peripheral edge and the interior surface of the conduit, the interior wall slopes outwardly in the downstream direction from adjacent to the axis of the conduit to said peripheral edge, and a port in communication with the tube located at or adjacent to the axis of the conduit and at or adjacent to a plane of said peripheral edge that is substantially normal to the axis.