Vacuum ejector nozzle with elliptical diverging section
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United States of America Patent
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Aug 25, 2020
Grant Date -
Dec 10, 2015
app pub date -
Dec 21, 2012
filing date -
Dec 21, 2012
priority date (Note) -
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Abstract
The invention provides an ejector for generating a vacuum, a drive nozzle for generating a drive jet of air from a compressed air source and directing the drive jet of air into an outlet flow passage at the outlet of a drive stage of the ejector to entrain air in a volume surrounding the jet of air into the jet flow to generate a vacuum across the drive stage. The drive nozzle substantially consists of an inlet flow section and an outlet flow section aligned in a direction of air flow through the nozzle. The outlet flow section diverging in the direction of airflow, from an outlet end of the inlet flow section to an exit of the nozzle, the outlet flow section having a shape which is more divergent near the outlet of the inlet flow section and less divergent near the exit of the nozzle.
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