Invention Grant
- Patent Title: Method of leak testing a low conductivity part
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Application No.: US15434137Application Date: 2017-02-16
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Publication No.: US10564064B2Publication Date: 2020-02-18
- Inventor: Edgar P. Calderon , Roger M. Brisbane , Herman K. Phlegm
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: G01B7/06
- IPC: G01B7/06 ; G01M3/40

Abstract:
A method of leak testing a fluid passage of a part manufactured from a low conductivity material includes measuring an electrical resistance between an interior wall surface of the fluid passage of the part, and an exterior wall surface of the fluid passage of the part. The measured electrical resistance is compared to a threshold value to determine if the measured electrical resistance is equal to or greater than the threshold value, or if the measured electrical resistance is less than the threshold value. The threshold value is equal to a nominal wall thickness of the fluid passage multiplied by a resistivity of the material used to form the part. The part passes the leak test when the measured electrical resistance is equal to or greater than the threshold value. The part fails the leak test when the measured electrical resistance is less than the threshold value.
Public/Granted literature
- US20180231368A1 METHOD OF LEAK TESTING A LOW CONDUCTIVITY PART Public/Granted day:2018-08-16
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