Measuring and testing – Liquid level or depth gauge
Reexamination Certificate
2005-08-09
2005-08-09
Kwok, Helen (Department: 2856)
Measuring and testing
Liquid level or depth gauge
C073S149000
Reexamination Certificate
active
06925868
ABSTRACT:
Acoustic volume indicators comprise a resonator, a frequency detector, and an indicator. The resonator can be an impactor or a vibration generator. The detector responds to vibration signals provided from the tank wall, which signals will show a significant increase in amplitude at the resonant frequency of the tank and its contents. The detector can be an accelerometer designed to record the received signal. The recorded signal is converted/analyzed by the frequency detector, and is compared to a known preprogrammed specific frequency vs. volume characteristic of the tank. Various audible and/or visual output or indicator devices can be used to indicate whether the liquid volume measurements within or outside of a predetermined volume range based on the known tank characteristics.
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Wai Huey
Young Winston B.
Jeffer Mangels Butler & Marmaro LLP
Kwok Helen
Young Manufacturing & Engineering, Inc.
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