# US 10,502,599 B2 · Polymeric magnetic flowmeter flow body assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,599 B2 - Document ID: US10502599B2 - Status: Granted - Kind: B2 - Application number: 15/086,826 - Filed: 2016-03-31 - Published: 2017-10-05 - Granted: 2019-12-10 - Earliest claimed: 2016-03-31 - Assignees: Rosemount Inc. - Applicants: Rosemount Inc. - Inventors: Steven B. Rogers; Michael J. Mayer; Bruce D. Rovner; Michael J. Mikolichek; Erik D. Anderson; Nicholas W. Bond; Chad T. Weigelt - Web page: https://patentgrep.com/patent/US10502599B2 ## CPC - G01F 1/588: {combined constructions of electrodes, coils or magnetic circuits, accessories therefor} - G01F 1/584: {constructions of electrodes, accessories therefor} - G01F 15/006: {characterised by the use of a particular material, e.g. anti-corrosive material (G01F15/14 takes precedence)} - G01F 15/14: Casings, e.g. of special material - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME ## Abstract A polymeric flow tube assembly is provided. The flow tube assembly includes a flow conduit configured to allow fluid flow therethrough. A first coil is mounted with respect to the flow conduit and disposed about a first magnetic pole member. A second coil is mounted with respect to the flow conduit and is disposed about a second magnetic pole member. The second magnetic pole member is configured to cooperate with the first magnetic pole member to generate an electromagnetic field across a flow measurement aperture. First and second electrodes are positioned within the flow tube assembly to measure an electromotive force generated within a fluid in the flow measurement aperture. At least one of the first magnetic pole member, second magnetic pole member, first electrode and second electrode is formed, at least in part, of a polymer. ## Claims ### Claim 1 A polymeric flow body assembly comprising: a polymeric flow body having a measurement bore with a bore curvature; a first coil mounted with respect to the measurement bore and disposed about a first magnetic pole member disposed to contact fluid in the measurement bore; a second coil mounted with respect to the measurement bore and disposed about a second magnetic pole member that is also disposed to contact the fluid in the measurement bore, wherein the second magnetic pole member is configured to cooperate with the first magnetic pole member to generate an electromagnetic field across the measurement bore; first and second metal electrodes positioned within the flow body assembly to contact a fluid in the measurement bore and to measure an electromotive force generated within the fluid, wherein the first and second metal electrodes taper toward a center of the polymeric flow body assembly; wherein at least one of the first magnetic pole member and second magnetic pole member is formed, at least in part, of the polymer; and wherein each of the first and second metal electrodes and each of the first and second magnetic pole members has a curved end with the bore curvature. ### Claim 2 (depends on 1) The polymeric flow body assembly of claim 1, wherein each of the first and second magnetic pole members are formed of a magnetically compliant material embedded within a polymer. ### Claim 3 (depends on 2) The polymeric flow body assembly of claim 2, wherein the magnetically compliant material is iron. ### Claim 4 (depends on 3) The polymeric flow body assembly of claim 3, wherein the polymer is acrylonitrile butadiene styrene. ### Claim 5 (depends on 1) The polymeric flow body assembly of claim 1, wherein the first and second electrodes are formed of an electrically conducting material embedded within a polymer. ### Claim 6 (depends on 5) The polymeric flow body assembly of claim 5, wherein the electrically conducting material is selected from the group consisting of carbon and nickel. ### Claim 7 (depends on 6) The polymeric flow body assembly of claim 6, wherein the polymer is acrylonitrile butadiene styrene. ### Claim 8 (depends on 1) The polymeric flow body assembly of claim 1, wherein the first and second magnetic pole members are formed of the same polymer as the first and second electrodes. ### Claim 9 (depends on 1) The polymeric flow body assembly of claim 1, wherein at least one of the first and second magnetic pole members includes a sealing tin extending radially therefrom. ### Claim 10 (depends on 1) The polymeric flow body assembly of claim 1, wherein at least one of the first and second electrodes includes a sealing fin extending radially therefrom. ### Claim 11 (depends on 1) The polymeric flow body assembly of claim 1, wherein each of the first and second magnetic pole members includes a tapered end adjacent the measurement bore. ### Claim 12 (depends on 1) The polymeric flow body assembly of claim 1, wherein each of the first and second electrodes includes a tapered end adjacent the measurement bore. ### Claim 13 (depends on 1) The polymeric flow body assembly of claim 1, wherein each of the first and second electrodes is formed of stainless steel. ### Claim 14 (depends on 1) The polymeric flow body assembly of claim 1, further comprising a frame formed of the same polymer as the at least one of the first magnetic pole member, second magnetic pole member, first electrode and second electrode. ### Claim 15 (depends on 1) The polymeric flow body assembly of claim 1, and further comprising a magnetic return path formed of a magnetically compliant material embedded within a polymer. ### Claim 16 A polymeric flow body assembly comprising: a polymeric flow body having a measurement bore with a bore curvature; a first coil mounted with respect to the measurement bore and disposed about a first magnetic pole member disposed to contact fluid within the measurement bore; a second coil mounted with respect to the measurement bore and disposed about a second magnetic pole member, wherein the second magnetic pole member is also disposed to contact the fluid within the measurement bore and is configured to cooperate with the first magnetic pole member to generate an electromagnetic field across the measurement bore; a first and second electrode, each comprising polymer and a conductive material, wherein the first and second electrodes are configured to detect the electromagnetic field across the measurement bore, wherein the first and second electrodes taper toward a center of the polymeric flow body assembly; wherein each of the first and second electrodes has a curved end with the bore curvature; and wherein each of the first and second magnetic pole members has a curved end with the bore curvature.