Liquid Flow Sensing System
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United States of America Patent
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Issued Date -
Sep 23, 2010
app pub date -
Oct 22, 2008
filing date -
Oct 23, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A liquid flow sensing system comprises a pump system configured to deliver a pre-determined volume V of liquid, and a measuring system comprising a chamber connected to the pump system and to an outlet system, the chamber bounded by an elastic membrane configured to be displaced elastically by an amplitude that enables said pre-determined volume V of liquid to be injected in the chamber. The measuring system further comprises a membrane displacement sensor configured to measure at least a portion of a decay characteristic of said membrane displacement amplitude after injection of the pre-determined volume V, into a value that may be used for determining absolute or relative viscosity of the liquid or changes in flow resistance downstream of the sensing system or for determining the presence of gas bubbles in a liquid flow circuit.
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