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IPC 7
 
G01F-G01F00338
  G01F 5/00 - G01F 25/00  

SECTION G – PHYSICS


G 01MEASURING (counting G06M); TESTING


G 01 FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME (milk flow sensing devices in milking machines or devices A01J 5/01; measuring or recording blood flow A61B 5/02, A61B 8/06; metering media to the human body A61M 5/168; burettes or pipettes B01L 3/02; arrangements of liquid volume meters or volume-flow meters in liquid-delivering apparatus, e.g. for retail sale purposes, B67D 5/16; pumps, fluid motors, details common to measuring or metering devices and pumps or fluid motors F01 to F04; locating, determining distance or velocity using reflection or reradiation of radio waves, analogous arrangements using other waves G01S; systems for ratio control G05D 11/00) [2,5]


Note

 Attention is drawn to the Notes following the title of class G01.


Subclass Index

MEASURING VOLUME 

G01F 17/00, G01F 19/00, G01F 22/00 

MEASURING VOLUME FLOW 

In continuous flow; in discontinuous flow; by proportion of flow 

G01F 1/00; G01F 3/00; G01F 5/00 

With multiple measuring ranges 

G01F 7/00 

By comparison with another value 

G01F 9/00 

LEVEL INDICATORS 

G01F 23/00 

METERING BY VOLUME 

G01F 11/00, G01F 13/00 

DETAILS, ACCESSORIES 

G01F 15/00 

TESTING, CALIBRATING 

G01F 25/00 



Measuring volume flow


1/

00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow (measuring a proportion of the volume flow G01F 5/00; measuring speed of flow G01P 5/00; indicating presence or absence of flow G01P 13/00; regulating quantity or ratio G05D) [2]

Note

 Groups G01F 1/704 to G01F 1/76 take precedence over groups G01F 1/05 to G01F 1/68.  [2]

1/

05.by using mechanical effects  [2]

1/

06..using rotating vanes with tangential admission  [2]

1/

07...with mechanical coupling to the indicating device  [2]

1/

075...with magnetic or electromagnetic coupling to the indicating device  [2]

1/

08...Adjusting, correcting, or compensating means therefor  [2]

1/

10..using rotating vanes with axial admission  [2]

1/

11...with mechanical coupling to the indicating device  [2]

1/

115...with magnetic or electromagnetic coupling to the indicating device  [2]

1/

12...Adjusting, correcting, or compensating means therefor

1/

20..by detection of dynamic effects of the fluid flow  [2]

1/

22...by variable-area meters  [2]

1/

24....with magnetic or electric coupling to the indicating device  [2]

1/

26....of the valve type  [2]

1/

28...by drag-force, e.g. vane type or impact flowmeter  [2]

1/

30....for fluent solid material  [2]

1/

32...by swirl flowmeter, e.g. using Karman vortices  [2]

1/

34..by measuring pressure or differential pressure  [2]

1/

36...the pressure or differential pressure being created by the use of flow constriction  [2]

1/

37....the pressure or differential pressure being measured by means of communicating tubes or reservoirs with movable fluid levels, e.g. by U-tubes  [2]

1/

38....the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule  [2]

1/

40....Details of construction of the flow constriction devices  [2]

1/

42.....Orifices or nozzles  [2]

1/

44.....Venturi tubes  [2]

1/

46.....Pitot tubes (specially adapted for measuring speed of fluids G01P 5/165)  [2]

1/

48...the pressure or differential pressure being created by a capillary element  [2]

1/

50...Correcting or compensating means  [2]

1/

52..by measuring the height of the fluid level due to the lifting power of the fluid flow  [2]

1/

54..by means of chains, flexible bands, or wires introduced into, and moved by, the flow  [2]

1/

56.by using electric or magnetic effects (G01F 1/66 takes precedence)  [2]

1/

58..by electromagnetic flowmeters  [2]

1/

60...Circuits therefor  [2]

1/

64..by measuring electrical currents passing through the fluid flow; by measuring electrical potential generated by the fluid flow, e.g. by electrochemical, contact, or friction effects (G01F 1/58 takes precedence)  [2]

1/

66.by measuring frequency, phase shift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters  [2]

1/

68.by using thermal effects  [2]

1/

684..Structural arrangements; Mounting of elements, e.g. in relation to fluid flow  [6]

1/

688...using a particular type of heating, cooling or sensing element  [6]

1/

69....of resistive type  [6]

1/

692.....Thin-film arrangements  [6]

1/

696..Circuits therefor, e.g. constant-current flow meters  [6]

1/

698...Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters  [6]

1/

699....by control of a separate heating or cooling element  [6]

1/

704.using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter (G01F 1/76, G01F 25/00 take precedence)  [4]

1/

708..Measuring the time taken to traverse a fixed distance  [4]

1/

712...using auto-correlation or cross-correlation detection means (measuring speed by using correlation detection means in general G01P 3/80, G01P 5/22)  [4]

1/

716...using electron paramagnetic resonance (EPR) or nuclear magnetic resonance (NMR)  [4]

1/

72.Devices for measuring pulsing fluid flows  [2]

1/

74.Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid  [2]

1/

76.Devices for measuring mass flow of a fluid or a fluent solid material (weighing a continuous stream of material during flow G01G 11/00)  [2]

1/

78..Direct mass flowmeters  [2]

1/

80...operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted  [2]

1/

82....using a driven wheel as impeller and one or more other wheels or moving elements which are angularly restrained by a resilient member, e.g. spring member, as the measuring device  [2]

1/

84....Gyroscopic mass flowmeters  [2]

1/

86..Indirect mass flowmeters, e.g. measuring volume flow and density, temperature, or pressure  [2]

1/

88...with differential-pressure measurement to determine the volume flow  [2]

1/

90...with positive-displacement meter or turbine meter to determine the volume flow  [2]


3/

00Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow (measuring a proportion of the volume flow G01F 5/00)

3/

02.with measuring chambers which expand or contract during measurement

3/

04..having rigid movable walls

3/

06...comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing

3/

08....Rotary-piston or ring-piston meters

3/

10....Geared or lobed impeller meters

3/

12....Meters with nutating members, e.g. discs

3/

14...comprising reciprocating pistons, e.g. reciprocating in a rotating body

3/

16....in stationary cylinders

3/

18.....involving two or more cylinders

3/

20..having flexible movable walls, e.g. diaphragms, bellows (diaphragms or bellows therefor G01F 15/16)

3/

22...for gases

3/

24.with measuring chambers moved during operation (wet gas-meters G01F 3/30)

3/

26..Tilting-trap meters

3/

28..on carriers rotated by the weight of the liquid in the measuring chambers

3/

30.Wet gas-meters

3/

32..comprising partitioned drums rotating or nutating in a liquid

3/

34..comprising bells reciprocating in a liquid

3/

36.with stationary measuring chambers having constant volume during measurement (with measuring chambers which expand or contract during measurement G01F 3/02)

3/

38..having only one measuring chamber

   G01F 5/00 - G01F 25/00  
 

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