US PATENT SUBCLASS 73 / 861.18
.~ By measuring vibrations or acoustic energy

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

861  DF  VOLUME OR RATE OF FLOW {23}
861.18.~ By measuring vibrations or acoustic energy {5}
861.19  DF  .~.~> Produced by fluidic oscillator
861.21  DF  .~.~> Caused by fluid interaction with obstacle {1}
861.25  DF  .~.~> Reflection or scattering of acoustic waves
861.26  DF  .~.~> Deflection of acoustic waves
861.27  DF  .~.~> Transit time of acoustic waves {2}

DEFINITION

Classification: 73/861.18

By measuring vibrations or acoustic energy:

(under subclass 861) Subject matter responsive to (a) traveling compressional waves (e.g., acoustic waves) existing in the fluid or applied thereto, (b) mechanical oscillations or fluid vortices produced by the interaction of the fluid with passive structure (e.g., an obstacle) or (c) vibrations applied to the fluid by dynamic means vibrating in a plane

parallel with the direction of flow.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152.32, for a flowmeter for determining a characteristic of a borehole, a well casing, or a drill rigging by measuring vibration.

861.34, for detection of the precessional motion of swirling fluid.

861.355+, for applied vibrations which impart angular or lateral momentum to the fluid.