公开(公告)号：US10234424B2

公开(公告)日：2019-03-19

申请号：US15380575

申请日：2016-12-15

Applicant: Caterpillar Inc.

Inventor： Christopher Anthony Kinney ,  Bradley Carl Hill ,  Kegan Jon Luick

IPC: H01F7/02 ,  G01N27/84

Abstract: A magnetic particle inspection tool is provided including a yoke with an inspection magnet, a first magnetic member, and a second magnetic member. The inspection magnet is configured to magnetize a work piece. The first magnetic member is rotatable relative to the inspection magnet between a first position and a second position, and the inspection magnet is slidable relative to the first magnetic member. The first magnetic member and second magnetic member include a plurality of magnetic sources forming a magnetic surface with a first magnetic pattern and a magnetic surface with a second magnetic pattern. The magnetic surfaces are magnetically attracted when the first magnetic member is in the first position and repelled when in the second position.