Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John T. Hewitt0
Date of Patent
September 15, 2009
Patent Application Number
11951865
Date Filed
December 6, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A liquid level sensor system actuated by a column pressure includes a hollow member having a distal open end adapted to be positioned into a liquid reservoir to a depth below a liquid surface level, and a sensor head unit. The sensor head unit is responsive to the column pressure to provide an indication of a liquid level in the reservoir. A flow restrictor is positioned to dampen instantaneous differential column pressure changes presented to the bellows member while permitting steady state column pressure to be communicated to the bellows member.
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