Volume and density indicator system for liquids in tanks
Patent 4155254 Issued on May 22, 1979. Estimated Expiration Date: 
November 21, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 21, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 533153 2771774 2834211 3921461 Liquid level measuring apparatus Patent #: 3992941 InventorAssigneeApplicationNo. 05/853263 filed on 11/21/1977US Classes:73/447, With liquid level responsive gauge or compensator73/311Multiple floatsExaminersPrimary: Kreitman, Stephen A.International ClassesG01N 9/18 (20060101)G01N 9/00 (20060101) G01F 23/66 (20060101) G01F 23/30 (20060101) AbstractA liquid storage tank is provided with an internal fixed support tube. Magnet-bearing liquid level and liquid density indicator floats are concentrically related to the fixed support tube externally thereof. Concentrically related, magnet-bearing indicator tubes are movably disposed within the fixed support tube and furnish liquid level and liquid density readout information when their respective magnets become magnetically latched with the float magnets.Field of SearchFreely vertical reciprocable float with carried indiciumContinuous test fluid supply With liquid level responsive gauge or compensator Float operated indicator Continuous test fluid supply With other measuring device With electrically controlled indicator Float Electric Buoyancy type Multiple floats Vertically reciprocable With electrically controlled indicator | |
