Natural vacuum leak detection device using diaphragm-seal mechanism
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United States of America Patent
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Dec 28, 2010
Grant Date -
May 28, 2009
app pub date -
May 2, 2008
filing date -
Nov 27, 2007
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Abstract
A system and method are provided for detecting a leak in an automotive fuel system. The functions of vacuum sensing, vacuum relief (high vacuum relief level) and pressure relief (high pressure relief level) are all performed by a single self-actuated diaphragm-seal valve mechanism.
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