US 12,031,852 B2
Magnetic flowmeter with flow tube liner having adhesion feature in an exterior surface
Paul Michael Keltgen, Waconia, MN (US); Michael John Mayer, Waconia, MN (US); Michael Jeffrey Mikolichek, Farmington, MN (US); Eddy Sun, Jiangsu Province (CN); and Yabin Zhang, Jiangsu (CN)
Assigned to MICRO MOTION, INC., Boulder, CO (US)
Appl. No. 17/442,354
Filed by Micro Motion, Inc., Boulder, CO (US)
PCT Filed Aug. 19, 2021, PCT No. PCT/CN2021/113522
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2023/019511, PCT Pub. Date Feb. 23, 2023.
Prior Publication US 2023/0059062 A1, Feb. 23, 2023
Int. Cl. G01F 1/58 (2006.01); G01F 1/60 (2006.01); G01F 15/00 (2006.01)
CPC G01F 1/588 (2013.01) [G01F 15/006 (2013.01); G01F 1/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising:
a flow tube configured to receive the process fluid flow there through;
a plurality of electrodes disposed to contact process fluid;
at least one electromagnetic coil disposed proximate the tube;
a flow tube liner comprising polytetrafluoroethylene (PTFE) having an interior surface configured to contact process fluid and a chemically etched exterior surface mounted to the flow tube; and
at least one adhesion feature carried on the exterior surface of the flow tube liner and the flow tube which promotes adhesion between the flow tube liner and the flow tube, wherein the adhesion feature establishes an adhesive bond-line thickness and protects the chemically etched exterior surface from being scraped away during insertion of the flow tube liner into the flow tube.