US PATENT SUBCLASS 73 / 61.73
.~.~.~ By flowing through barrier or restriction and measuring flow effect (e.g., pressure, volume of or rate of flow)

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}
61.71  DF  .~.~ For measuring solid components (e.g., particles) {3}
61.73.~.~.~ By flowing through barrier or restriction and measuring flow effect (e.g., pressure, volume of or rate of flow) {1}
61.74  DF  .~.~.~.~> Thermal

DEFINITION

Classification: 73/61.73

By flowing through barrier or restriction and measuring flow effect (e.g., pressure, volume of or rate of flow):

(under subclass 61.71) Subject matter wherein the isolation is made by means of an element located in a flow path of the liquid and the determination is made by measuring the effect of the movement of the liquid.

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 determining paper and wood suspension properties 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 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 determining settling or filtering ability by measuring volume or flow rate of the liquid or the liquid mixture.

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 the 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, 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.

250, Radiant Energy, particularly

258, 259+, 320+, 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 liquid flow not involving nonoptical measuring or testing.

364, Electrical Computers and Data Processing Systems,

510+, for application of computer detail or data processor detail for 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.