DEVICE WITH LIQUID FLOW RESTRICTION
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United States of America
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Sep 12, 2019
app pub date -
Sep 11, 2017
filing date -
Sep 11, 2017
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Abstract
A device for controlling electrical power supply in response to air pressure measurement includes an airflow path, a chamber having an aperture, a liquid flow restrictor configured to inhibit ingress of liquid into the chamber via the aperture, a pressure sensor located in the chamber and operable to detect, in the presence of the liquid flow restrictor, air pressure changes caused by air flow in the airflow path, and a circuit for converting air pressure changes detected by the pressure sensor to control signals for controlling output of power from a battery.
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