Patent ID: 6705171
Filing Date: 2004-03-16
Classification: G01F

Abstract:
An apparatus for measuring a mass flow of bulk material, by applying the Coriolis measuring principle, said apparatus comprising a housing, an impeller rotatably mounted in said housing, a drive motor (9) for driving said impeller with a constant r.p.m. and a bulk material supply for feeding said flow of bulk material to said impeller for radially detouring said bulk material flow by said impeller, a force measuring element (22), a torque moment transmitting device for transmitting a drive torque moment applied by said motor to said impeller, to said force measuring element (22), said torque moment transmitting device comprising a rotatable bearing (12), at least two horizontal, angularly spaced leaf spring elements (16, 17) supported by said rotatable bearing (12) for rotation about a central axis (13) defined by said rotatable bearing (12), said at least two horizontal angularly spaced leaf spring elements (16, 17) crossing each other in said central axis for transmitting said torque moment to said force measuring element (22), said leaf spring elements (16, 17) being flexible in response to bending loads effective in a rotation direction about said central axis and stiff against bending in a leaf spring length direction.