Patent ID: 6397685
Filing Date: 2002-06-04
Classification: G01F

Abstract:
A mass flowmeter operating by the Coriolis principle, incorporating one essentially straight, moving-fluid-conducting Coriolis measuring tube (1), at least one oscillator (2, 3) associated with the Coriolis measuring tube (1) and exciting said Coriolis measuring tube (1), at least one detector (4, 5) associated with the Coriolis measuring tube (1) and serving to measure Coriolis forces and/or Coriolis oscillations derived from Coriolis forces, and a compensating cylinder (6), said Coriolis measuring tube (1) being positioned within the compensating cylinder (6) and said Coriolis measuring tube (1) and the compensating cylinder (6) being mechanically connected with each other, wherein as a mass-equalization provision for the excitation oscillation, a first equalizing mass (7) is employed and is connected to the compensating cylinder (6) in the center plane (M), extending perpendicular to the longitudinal axis (L), of the compensating cylinder (6), and as a mass-equalization device for the Coriolis oscillation, a second equalizing mass (10) and a third equalizing mass (11) are provided and the said second equalizing mass (10) and the third equalizing mass (11) are incorporated as end sections of the compensating cylinder (6).