US PATENT SUBCLASS 73 / 861
VOLUME OR RATE OF FLOW

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

861VOLUME OR RATE OF FLOW {23}
861.01  DF  .~> With indirect temperature or density compensation {1}
861.04  DF  .~> Of selected fluid mixture component
861.05  DF  .~> By measuring transit time of tracer or tag {2}
861.07  DF  .~> By measuring tracer concentration
861.08  DF  .~> By measuring electrical or magnetic properties {2}
861.18  DF  .~> By measuring vibrations or acoustic energy {5}
861.32  DF  .~> By measuring swirl rate imparted by static means {2}
861.351  DF  .~> Mass flow by imparting angular or transverse momentum to the fluid {3}
861.39  DF  .~> Using an applied fluid jet
861.41  DF  .~> By counting drops, bubbles, or particles
195  DF  .~> System {2}
198  DF  .~> Combined {3}
202  DF  .~> Proportional {2}
204.11  DF  .~> Thermal type {9}
861.42  DF  .~> Using differential pressure {6}
215  DF  .~> Weir type {1}
*  DD  .~> Tank type {3}
227  DF  .~> Area-velocity integrating
861.71  DF  .~> By measuring thrust or drag forces {3}
861.77  DF  .~> Using rotating member with particular electrical output or circuit {1}
861.79  DF  .~> Using turbine {5}
232  DF  .~> Expansible chamber {6}
272 R  DF  .~> Element {7}

DEFINITION

Classification: 73/861

VOLUME OR RATE OF FLOW:

(under the class definition) Devices for determining the volume of flow, speed, volume rate of flow or mass rate of flow of fluent material.

(1) Note. For purposes of this subclass, fluent materials include liquids, gases, fluent solids, and fluent mixtures.

(2) Note. Patents claiming only such motive part of volume meters as are capable of general use as a fluid motor are classified in Classes 91, Motors: Expansible Chamber Type and 415, Rotary Kinetic Fluid Motors or Pumps. See the reference to Class 73 in section III of the Class Definition of Class 91 for a further statement of this line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.16+, for calibration of flow meters.

155, for determining fluid flow in bore holes.

170.07, and 170.11, for determining fluid flow-rate and direction.

181+, for determining the speed of a craft with respect to a fluid. 488+, for mechanical speed, velocity, or acceleration measuring of nonfluent material.

SEE OR SEARCH CLASS

48, Gas: Heating and Illuminating,

180+, for metering and mixing two gases where one is a fuel.

91, Motors: Expansible Chamber Type, see (3) Note above.

116, Signals and Indicators, for nonelectrical means for giving an alarm upon occurrence of fluid flow.

128, Surgery,

630+, for flow-measuring means with structure particularly adapted for placement on or 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.

164, Metal Founding, 154.3, and 155.5 for a metal casting apparatus which may include a volumetric flow rate sensor.

175, Boring or Penetrating the Earth,

48, for measuring the rate of flow of drilling fluid.

222, Dispensing, particularly

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

235, Registers,

92, for particle counting with display means.

250, Radiant Energy, particularly

258, 259+, 302+, 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 electric means for giving a nonquantitative indication or signal in response to the condition, such as flow, of a fluid.

356, Optics: Measuring and Testing,

27+, for flow-measuring means employing lasers.

364, Electrical Computers and Data Processing Systems,

555, for particle count, distribution and size.

415, Rotary Kinetic Fluid Motors or Pumps, see (2) Note above.

418, Rotary Expansible Chamber Devices, for rotary expansible chamber devices, per se.