C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
153/15, 148/46.5
C21D 6/04 (2006.01) C21D 9/08 (2006.01) G01F 1/84 (2006.01)
Patent
CA 1321533
METHOD AND APPARATUS FOR CRYOGENIC TREATMENT OF CORIOLIS MASS FLOW METER STRUCTURES Abstract of the Invention A method and apparatus 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. The apparatus of the present invention fixes the flow tube during the annealing and cryogenic cooling treat- ment 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. 6868-33CN
614265
Pratt Wayne
Wong Richard B.
Abb Kent Taylor Limited
Gowling Lafleur Henderson Llp
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