US PATENT SUBCLASS 73 / 53.04
.~.~ By measuring fluid flow characteristic (e.g., by volume or rate of flow or by change in fluid level)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


73 /   HD   MEASURING AND TESTING

53.01  DF  LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
53.03  DF  .~ Paper or wood suspension (e.g., paper or wood pulp) {1}
53.04.~.~ By measuring fluid flow characteristic (e.g., by volume or rate of flow or by change in fluid level)

DEFINITION

Classification: 73/53.04

By measuring fluid flow characteristic (e.g., by volume or rate of flow or by change in fluid level):

(under subclass 53.03) Subject matter wherein the determination is made by measuring a parameter which is characteristic of the liquid being in motion.

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.

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 determining settling or filtering ability by measuring volumetric or flow or sedimentation rate.

61.73, for utilizing flow effect to measure settling or filtering ability. 152.21+, for determining a characteristic of a borehole, a casing, or a drill rigging by measuring a flow of a fluid during drilling.

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 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,

27+, for flow measuring means employing a laser.

364, Electrical Computers and Data Processing Systems,

555, for measuring, testing, or monitoring means utilizing electrical computer detail or data processing techniques without detail of the sensing means. 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.