Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Reexamination Certificate
2006-03-14
2006-03-14
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
C073S054240, C073S064530, C073S602000, C073S579000, C600S438000, C600S443000
Reexamination Certificate
active
07010962
ABSTRACT:
An apparatus and method is described for measuring properties of bubbles from which certain physical characteristics of the liquid in which the bubbles are generated can be determined. The evolution of a bubble includes (1) formation and growth at a nozzle disposed within the liquid through which a gas is flowed, or formation and growth as a result of cavitation in the liquid from the application of focused acoustic energy to a location within the liquid; (2) detachment and resonance; and (3) rise towards terminal velocity. Measurements of the resonance frequency, the shape oscillation frequency and the terminal velocity of the bubble allow the determination of the density and surface tension of the liquid and the radius of the bubble. Since the properties of the liquid affect the evolution of the bubble, observation of a rising bubble can be used as a tool for characterizing the liquid; as an example, the present invention can be used to monitor changes in the liquid itself or changes in the concentration or integrity of materials dissolved in the liquid.
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Cochran Freund & Young LLC
Freund Samuel M.
Miller Rose M.
Williams Hezron
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