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US Patent 7437957 Porous medium tensiometer

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Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7437957
Patent Inventor Names
Jean Caron1
Sébastien Descoteaux1
Philippe Jobin1
Jocelyn Boudreau1
Date of Patent
October 21, 2008
Patent Application Number
11503909
Date Filed
August 15, 2006
Patent Primary Examiner
‌
Edward Lefkowitz
Patent abstract

A porous medium tensiometer has a filling mechanism which allows to fill a fluid chamber and simultaneously withdraw gas contained in the fluid chamber. A self-priming tensiometer includes a porous material tip having a first section surrounded by a fluid-impermeable membrane, a second section, a threshold suction range and pores, the pores auto-filling with liquid when in fluid communication with a porous medium having a liquid potential being at least equal, in absolute value, to the threshold suction range, the liquid contained in the pores having a liquid pressure representative of the liquid potential; a one-way fluid control device in fluid communication with the porous material tip and allowing fluid contained in pores of the porous material to exit therethrough when the porous material tip auto-fills with liquid; and a pressure transducer in liquid communication with the porous material tip.

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