Venturi devices resistant to ice formation for producing vacuum from crankcase gases
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United States of America Patent
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Jan 29, 2019
Grant Date -
May 4, 2017
app pub date -
Oct 28, 2016
filing date -
Oct 28, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A device for producing vacuum using the Venturi effect, systems utilizing the device, and methods of making the device are disclosed. The device has a housing defining a Venturi gap, a motive passageway converging toward the Venturi gap and in fluid communication therewith, a discharge passageway diverging away from the Venturi gap and in fluid communication therewith, and a suction passageway in fluid communication with the Venturi gap. The suction passageway has an interior surface with a surface topography that renders the interior surface hydrophobic and has an oleophobic coating applied to the interior surface while maintaining the surface topography.
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