Patent ID: 7861603

Claim:
A coriolis mass flowmeter comprising: an oscillator for oscillating a fluid pipe that forms a flow path for allowing a measurement fluid to flow; first and second detectors that are disposed to be spaced apart from each other along the flow path of the fluid pipe so as to detect a state of oscillation of the fluid pipe; a calculator for calculating a mass flow rate of the measurement fluid that passes through the flow path of the fluid pipe on the basis of a relative amount of the states of oscillation that are detected by the first and second detectors, and a support member that supports two ends of the fluid pipe so that the two ends are fixed ends to the oscillator, wherein the fluid pipe comprises: a bent portion whose axial line is bent between the two ends, an inner pipe made of a fluororesin whose inner circumferential surface is in contact with the flow path; and an outer pipe having fibers that are arranged in order to surround an outer circumferential surface of the inner pipe and a resin that is cured in a state of close adhesion between the fibers arranged in order, and having an elastic modulus larger than that of the inner pipe, wherein the fibers are in a fabric form extending in first and second spiral directions that cross each other to surround the outer circumference of the inner pipe.