Importance

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Abstract

The present invention relates to an apparatus for measuring a mass flow of a fluent material using the Coriolis measuring principle. The apparatus comprises an inlet tube positioned and configured to allow the fluent material to flow therethrough and into the apparatus. An impeller wheel rotates about a rotational axis. A motor is operatively connected to the impeller wheel and rotates the impeller about the rotational axis thereof. The impeller wheel is positioned with respect to the inlet tube such that the fluent material flowing through the inlet tube into the apparatus flows into a central area of the impeller. The impeller has vanes that redirect the fluent material flowing from the inlet tube into the central area of the impeller in a generally radial direction away from the central area as the impeller is being rotated by the motor. A flow distributing device associated with the inlet tube is constructed and arranged to distribute the fluent material flowing through the inlet tube towards the central area of the impeller generally symmetrically about the rotational axis of the impeller. A waste eliminating ring is positioned between the inlet tube and the impeller. The waste eliminating ring prevents loss of the fluent material deflecting off the impeller back towards the inlet tube. A frusto-conical flange is positioned about the impeller. A spherical compliant bearing is connected to the impeller and resists radial movement of the impeller. A force transducer is operatively associated with the impeller and a flexible connecting element extending between the stator of the motor and the force transducer such that the connecting element transmits rotational movement of the stator to the force transducer.

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First Claim