Method and fluidic apparatus for generating pulsed and oscillating air flow for surface cleaning and sweeping
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United States of America Patent
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Sep 19, 2017
Issued Date -
Oct 9, 2014
app pub date -
Apr 3, 2014
filing date -
Apr 3, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An oscillating or pulsing fluid stream, or flow, is produced from a flow of pressurized air by fluidic apparatus in a device configured for use in surface cleaning, sweeping, lawn care applications, and the like. A converging nozzle assembly defining a tapered internal lumen having a smooth narrowing profile is configured to generate at a power nozzle a high velocity stream with minimal pressure drop. Downstream of the power nozzle, first and second control ports are in fluid communication with the high velocity stream and with each other via an inertance loop having a lumen of selected cross sectional area and length. The varying air flow is directed through an outlet chamber shaped to produce an oscillating or a pulsating flow.
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Cited Art Landscape
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