Metering pump assembly
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United States of America Patent
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Sep 17, 2013
Grant Date -
Jan 29, 2009
app pub date -
Dec 29, 2005
filing date -
Dec 30, 2004
priority date (Note) -
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Abstract
The invention relates to a metering pump for admixing a fluid reduction agent into an exhaust gas flow, which comprises a premixing device in which the supplied reduction agent is mixed in a mixing region with a pressurized gas, wherein a first return valve is arranged in the premixing element in a supply conduit for the reduction agent, in front of the mixing region in the flow direction.
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