Patent ID: 6948379

Claim:
A mass flowmeter operating by the Coriolis principle and incorporating an essentially straight Coriolis measuring tube through which flows a process medium, two essentially straight connecting pipes conducting the flowing medium, at least one oscillator associated with the Coriolis measuring tube and stimulating said Coriolis measuring tube, at least one measuring sensor associated with the Coriolis measuring tube and capturing Coriolis forces and/or Coriolis oscillations generated by Coriolis forces, and a compensating cylinder, where said Coriolis measuring tube is positioned within the compensating cylinder, the two end sections of the compensating cylinder are solidly connected to the respective end sections of the Coriolis measuring tube, the Coriolis measuring tube transitions with either end section into a connecting pipe, said connecting pipes extend outside the compensating cylinder, and by means of mounting flanges provided on the external ends of the connecting pipes the mass flowmeter can be installed in a pipeline system, wherein each connecting pipe meets the requirements of the formula M ⁢ ⁢ f 2 e ⁢ ⁢ i / l 3 > 5.5 where M is the mass of the compensation cylinder, f is the natural frequency of the water-filled Coriolis measuring tube, e is the modulus of elasticity of the connecting pipes, i is the geometric moment of inertia of the connecting pipes and l is the length of the connecting pipes.