Improvements to powered air breathing apparatus
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United States of America Patent
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Jul 12, 2016
Grant Date -
Dec 5, 2013
app pub date -
Oct 27, 2010
filing date -
Nov 2, 2009
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Abstract
A safety breathing apparatus has a sensor for measuring the difference in pressure between two points in the gas delivered to a head unit. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.
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