US PATENT SUBCLASS 73 / 54.07
.~.~.~ By time interval of travel or flow rate measuring

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

53.01  DF  LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
54.01  DF  .~ Viscosity {11}
54.04  DF  .~.~ Friction tube (e.g., capillary) {3}
54.07.~.~.~ By time interval of travel or flow rate measuring {1}
54.08  DF  .~.~.~.~> Including a photocell

DEFINITION

Classification: 73/54.07

By time interval of travel or flow rate measuring:

(under subclass 54.04) Subject matter wherein the determination is made by measuring the volume of or the mass rate of flow of the liquid or the time elapsed for the liquid to move a predetermined distance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.16+, for proving or calibrating volume of flow, speed of flow, volume rate, or flow or mass rate of flow.

53.04, for utilizing flow characteristics to measure a property of a paper or pulp suspension.

54.13, for determining viscosity by measuring a time interval of travel or flow rate using an orifice, nozzle, or extrusion means wherein there is disclosed detail of a means whose optical character changes due to a change in a physical phenomenon associated with the liquid whose viscosity is being measured.

54.19, for detail of a timing means in a device wherein viscosity is determined by gravity movement of an object in a liquid.

61.64+, for the utilization of flow properties in order to determine settling or filtering ability. 61.73, for utilization of flow characteristic to measure the solid content of a liquid suspension.

152.29+, for determining a characteristic of a borehole, a casing, or a drill rigging by measuring a rate of flow of a fluid, per se.

170.11+, for determining the direction and rate of flow of a fluid in meteorology and oceanology.

178+, for the speed of a craft with respect to a fluid.

861+, for measuring the volume or the rate of flow of liquid, per se.

SEE OR SEARCH CLASS

116, Signals and Indicators, appropriate subclass, for nonelectrical means for giving an alarm upon the occurrence of a predetermined condition of a fluid.

128, Surgery,

668+, for measuring blood flow in the body wherein there is disclosed structure for placement in a living body.

137, Fluid Handling,

98+, for a self-proportioning flow system and subclasses 624.11+ for a programmed or timed valve which meters fluid merely by timing the interval between opening and closing of the valve.

175, Boring or Penetrating the Earth, appropriate subclass for measuring the rate of flow of drilling fluid combined with a device of that class type.

222, Dispensing, particularly

14, 59, and 71 for volume of rate of flow-measuring means having dispensing features or which are used in dispensing combinations.

324, Electricity: Measuring and Testing,

306, for flow-measuring means responsive to nuclear induction.

340, Communications: Electrical,

606+, for electrical means for giving a humanly perceptible indication or signal in response to a predetermined condition, such as the flow of fluid.

356, Optics: Measuring and Testing, appropriate subclasses for flow measuring devices of the optical type including no manipulation other than that necessary for an optical test.

364, Electrical Computers and Data Processing Systems,

510+, for application of computer detail or data processor detail in fluid flow study.

368, Horology: Time Measuring Systems or Devices,

89+, for time interval measuring, per se. 377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,

21, for a system utilizing a pulse counter to measure fluid flow.