Measuring needle with non return valve function
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United States of America Patent
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Sep 10, 2013
Grant Date -
Dec 20, 2012
app pub date -
Jan 25, 2011
filing date -
Mar 8, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A device for measuring pressure or temperature in a heating or a cooling system and where the device is a measuring needle complete (1) comprising a measuring needle housing (6) with one cavity (20) and a spring-loaded non return valve (8), where the non return valve, in a measuring position, has an open communication with the probe (10) via the measuring needle housing and a hose nipple, via a hose, to a measuring instrument. This open communication is closed immediately as soon as the measuring is completed and the measuring needle (1) is removed from the measuring nipple. After measuring, due to this immediate closing, leakage of the enclosed fluid that exists in the complete measuring needle (1) and the measuring hose (5) is prevented.
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