Ejector device
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United States of America Patent
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May 29, 2012
Grant Date -
Dec 3, 2009
app pub date -
Jan 9, 2008
filing date -
Jan 10, 2007
priority date (Note) -
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Abstract
An ejector device effective to generate a negative pressure by element of compressed air fed to an ejector of the device via a compressed-air duct includes an air suction duct, a pressure sensor and an electrically activatable valve member arranged in the compressed-air duct for regulating the flow of compressed air to the ejector, as well as electrically supplied control electronics (6) adapted to actuate the valve member in response to the pressure in the air suction duct detected by the sensor. The device includes an accumulator by which the control electronics are supplied with electricity, and a generator, which via a charging air duct (9), is in flow communication with the compressed-air duct and is driven by compressed air for generating electrical energy, which is brought into the accumulator for charging the same.
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