Measuring and testing – With fluid pressure – Leakage
Patent
1995-12-21
1998-05-26
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 405, 141 2, 141 94, 141 96, 137177, 137312, 137551, G01M 308, G01M 328, B65D 612
Patent
active
057568820
ABSTRACT:
A method is provided for accurately determining the volume of gas that has leaked through and around a cap having a mouth and a seal situated about the circumference of the mouth. The method includes the steps of positioning the cap within a testing neck on a fuel cap testing apparatus, fixing the cap in the neck to create a general sealing engagement between the seal and the neck and to cause the seal to move into the neck, and "staging" the cap for at least 2.5 seconds. Staging refers to the necessary waiting period that must pass in order to allow the seal to complete moving into the testing neck. A test is then conducted for changes in pressure within the testing neck due to low-volume gas leaks through and around the cap.
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Bunyard Jeff M.
Cranfill Leonard J.
Stant Manufacturing Inc.
Wiggins J. David
Williams Hezron E.
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