Espresso machine method and apparatus
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United States of America Patent
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Mar 10, 2015
Grant Date -
Mar 21, 2013
app pub date -
May 6, 2011
filing date -
May 11, 2010
priority date (Note) -
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Abstract
A method and apparatus for measuring a resultant flow delivered by a pump coupled to an over pressure valve, the method comprising the steps of: measuring, using a first flow meter, feed flow to the pump; measuring, using a second flow meter, return flow from the over pressure valve; and calculating resultant flow, at least in part, by subtracting measured return flow from measured feed flow. A pump power modification module can further modifying the pump output pressure to enable pressure profiling.
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