US PATENT SUBCLASS 73 / 61.64
.~.~.~ By volume or flow rate

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}
61.41  DF  .~ Content or effect of a constituent of a liquid mixture {8}
61.63  DF  .~.~ Settling or filtering ability {2}
61.64.~.~.~ By volume or flow rate

DEFINITION

Classification: 73/61.64

By volume or flow rate:

(under subclass 61.63) Subject matter wherein the determination is made by measuring the volume of flow, the speed, the volume rate of flow or mass rate of flow of the liquid mixture.

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.

1.73+, for proving or calibrating a liquid level or volume measuring apparatus.

53.04, for a property of a paper or wood suspension by measuring flow characteristic.

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. 61.73, for utilizing flow effect to measure solid components of a liquid suspension.

152.18+, for determining a characteristic of a borehole, a casing, or a drill rigging by measuring a flow of a fluid or by analyzing a fluid.

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

178+, for determining 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 subclasses, 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 the 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 subclasses for measuring the rate of flow of drilling fluid combined with a device of that class. 222, Dispensing, particularly

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

250, Radiant Energy, particularly

258, 259+, 356.1, and 432 for miscellaneous radiant energy responsive devices.

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 subclass for an optical measuring of fluid flow not involving nonoptical measuring or testing beyond that found in Class 356.

364, Electrical Computers and Data Processing Systems,

510, for an application of computers or data processing in fluid flow studying. 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.