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Hermetic seal leak detection apparatus with variable size test chamber

  • US 9,097,609 B1
  • Filed: 04/30/2013
  • Issued: 08/04/2015
  • Est. Priority Date: 04/30/2013
  • Status: Active Grant
First Claim
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1. A hermetic seal leak detection apparatus comprised of:

  • a hermetically sealed object under test wherein said hermetically sealed object under test has an internal test object pressure;

    at least one variable size gas space test chamber enclosed in a flexible housing which surrounds said hermetically sealed object under test, wherein said variable size gas space test chamber has a measurable test chamber pressure;

    at least one expandable and contractible bellows operatively coupled with said variable size gas space test chamber;

    wherein said at least one expandable and contractible bellows controls size of said variable size gas space chamber by movement of said bellows alternatively causing said test chamber pressure to be unequal to said internal test object pressure; and

    at least one sensing device operatively coupled with said variable size gas space chamber to sense changes in said test chamber pressure over a specified time duration wherein said internal test object pressure and said test chamber pressure are identified by readings of said sensing device producing values that define a pressure value curve which indicates the presence or absence of a leak in said hermetically sealed object under test.

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