Metal treatment – Compositions – Heat treating
Patent
1989-09-14
1991-12-17
Dean, R.
Metal treatment
Compositions
Heat treating
148 115A, 148 115N, 148 12E, 148125, 148127, 7386138, C21D 810, G01F 184
Patent
active
050732080
ABSTRACT:
A method for increasing stability of a Coriolis mass flow meter by relieving residual and internal stress within the flow tube and related structures of the meter. The method including the steps of bending the flow tube in the desired form, fixing related flow tube structures onto the flow tube, clamping the flow tube so as to maintain the desired form during subsequent processes, annealing the flow tube, and cryogenically cooling the flow tube. An apparatus to be utilized along with the method of the present invention fixes the flow tube during the annealing and cryogenic cooling treatment processes to maintain the desired shape of the flow tube. The invention also contemplates the flow tube made in accordance with the method of the present invention.
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Pratt Wayne
Wong Richard B.
Dean R.
K-Flow Corporation
Phipps Margery S.
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