Coriolis effect fluid flow meter

A fluid flow meter comprising a tube curved about a first axis and mounted for oscillatory motion about a second axis, said tube having a first end and a second end, means operatively connected to said tube for driving the tube in a controlled oscillatory motion about said second axis to generate in fluid flowing in the tube a measurable bi-directional force, measurement means operatively connected to said tube and arranged to measure the bidirectional force, at a specific point on the curved tube, in the direction of said first axis and to derive the fluid flow therefrom, and a pair of flexible couplings towards either end of the tube through which the fluid flow passes into and from the tube and by which said tube is mounted, the flexible couplings being positioned to facilitate movement of the tube about a third axis and minimize forces on the tube due to the stiffness of the tube so that the signal measured by the measurement means is independent of the mechanical stiffness of the tube.