US 11,946,903 B2
Magnetizer with cushion
Ron Thompson, Vaughan (CA); Min Xu, Woodbridge (CA); and Calin Cristian Ganea, Toronto (CA)
Assigned to Novitech, Inc., Denver, CO (US)
Filed by Novitech, Inc., Denver, CO (US)
Filed on Jan. 27, 2022, as Appl. No. 17/586,020.
Application 17/586,020 is a division of application No. 17/116,090, filed on Dec. 9, 2020, granted, now 11,346,810.
Application 16/251,348 is a division of application No. 15/674,973, filed on Aug. 11, 2017, granted, now 10,401,325, issued on Sep. 3, 2019.
Application 17/116,090 is a continuation of application No. 16/883,222, filed on May 26, 2020, granted, now 10,969,366, issued on Apr. 6, 2021.
Application 16/883,222 is a continuation in part of application No. 16/251,348, filed on Jan. 18, 2019, granted, now 10,705,051, issued on Jul. 7, 2020.
Claims priority of provisional application 62/373,902, filed on Aug. 11, 2016.
Claims priority of provisional application 62/448,811, filed on Jan. 20, 2017.
Prior Publication US 2022/0146455 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 27/82 (2006.01)
CPC G01N 27/82 (2013.01) 20 Claims
OG exemplary drawing
 
1. An axial magnetizer module for a smart pig, comprising:
a central shaft; and
at least one magnet bar, coupled to the central shaft at at least one axial end by a set of links, a hinge, and one of a torsion spring or a magnetizer cushion, the magnet bar configured to induce a steady magnetic field coaxially to a longitudinal axis of the central shaft, the at least one magnet bar comprising:
a first magnet of a first polarity circumferentially disposed around a front end of the central shaft;
a second magnet of a second polarity circumferentially disposed around a rear end of the central shaft;
a front magnetic circuit pole coupled to the first magnet and extending radially outward from the central shaft; and
a rear magnetic circuit pole coupled to the second magnet and extending radially outward from the central shaft;
a sensor head to monitor magnetic flux comprising at least one sensor disposed between the front magnetic circuit pole and rear magnetic circuit pole;
wherein the magnetizer cushion is constructed substantially from a thermoset or thermoplastic material.