Multi-stage relief valve having different opening pressures
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United States of America Patent
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Issued Date -
Jan 31, 2008
app pub date -
Jul 28, 2006
filing date -
Jul 28, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A pressure relief valve is provided for a common rail fuel system. The pressure relief valve has a housing with an inlet, an outlet, and a central bore fluidly connecting the inlet and the outlet. The pressure relief valve also has a single valve seat and a first valve element movable to selectively block a flow of fluid through the single valve seat. The pressure relief valve further has a second valve element disposed within the central bore of the housing and movable to selectively block a flow of fluid through the central bore.
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