Patent ID: 6122977
Filing Date: 2000-09-26
Classification: G01F

Abstract:
A mass flow measuring device for measuring a mass flow rate of a flowing particulate material or a flowing fluid using the Coriolis measuring principle, said mass flow measuring device comprising:a stand;said stand including a bearing cage;an impeller constructed and arranged to be positioned such that the flowing fluid or particulate material is directed into a central area of said impeller;a vertical shaft, said impeller being mounted on a first end of said shaft such that rotating said shaft rotates said impeller, said first end of said shaft being journaled in said cage;a motor mounted on a second end of the shaft opposite said first end, said motor being constructed and arranged to rotate said shaft;said impeller being constructed and arranged such that the flowing fluid or particulate material flowing into the central area thereof applies a torque to said impeller that is transmitted to said motor through said shaft and such that the rotation of said impeller directs the flowing fluid or particulate material radially outwardly from the central area thereof; anda torque transducer mounted to said stand, said torque transducer being constructed and arranged to measure the torque transmitted to said motor through said shaft;said motor and said second end of said shaft being mounted on and supported by said transducer such that said transducer connects said motor and the second end of said shaft to said stand.