Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John T. Hewitt0
Date of Patent
February 9, 2010
Patent Application Number
12143687
Date Filed
June 20, 2008
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 low liquid level alarm circuit is responsive to the bellows member to generate a signal indicative of a low liquid level state.
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