G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
Introduced: September 1968
Description
This subclass encompasses instruments and methods for quantifying fluid volumes, flow rates, and liquid levels across industrial, scientific, and domestic applications. Coverage includes volumetric flowmeters (turbine, gear, and piston types), mass flowmeters (Coriolis and thermal devices), liquid level indicators (float, capacitive, and ultrasonic), and positive displacement metering pumps. The classification extends to flow measurement principles using differential pressure, electromagnetic, and vortex-shedding techniques, as well as apparatus for calibration and testing of such instruments.
Title
Titles differ between systems:
IPC: MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
CPC: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
Full Title
Full titles differ between systems:
MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
Additional Content IPC
Limiting references
Measuring linear dimensions to determine volume
Application references
Milk flow sensing devices in milking machines or devices Food containers with dispensing devices for dispensing a certain quantity of powdered or granulated foodstuffs Apparatus for making beverages having water-level controls Measuring blood flow , Metering media introduced into the human body, e.g. drip meters Controlling the quantity of fluent-solid material fed into a container during packaging by volumetric measurement Controlling the quantity of plastic material, semi-liquids, liquids, or mixed solids and liquids, fed into a container during packaging by volumetric measurement Separating measured quantities from supply by volume measurement Bottling liquids or semi-liquids with provision for metering the liquids to be introduced, e.g. when adding syrups Arrangements of liquid volume meters or volume-flow meters in liquid-delivering apparatus, e.g. for retail sale purposes Measuring liquid level in wells Indicating devices for lubricant level Measuring intake air flow to generate a control signal for control of supply of combustible mixture in combustion engines Proportioning devices in lubricating systems Arrangements for measuring the quantity of conveyed product in pipe-lines Adaptation of level indicators to, or mounting on, steam boilers Controlling water feed or water level for steam generation Rainfall or precipitation gauges Apparatus actuated by coins, cards or the like with meter-controlled dispensing of liquid or gas Reactor-coolant flow measuring or monitoring in nuclear reactors; Moderator- or coolant-level detecting devices in nuclear reactors , Accumulators combined with arrangements for measuring, testing, or indicating condition, e.g. level or density of the electrolyte
IPC and CPC are identically structured here. All 13 subcodes exist in both systems.
4 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- G01F 1/00 Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) +1 CPC IPC+CPC Available in IPC and CPC
- G01F 11/00 Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it +2 CPC IPC+CPC Available in IPC and CPC
- G01F 13/00 Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups +3 CPC IPC+CPC Available in IPC and CPC
- G01F 15/00 Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus +5 CPC IPC+CPC Available in IPC and CPC
- G01F 17/00 Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies (measuring linear dimensions to determine volume G01B) IPC+CPC Available in IPC and CPC
- G01F 19/00 Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups +3 CPC IPC+CPC Available in IPC and CPC
- G01F 22/00 Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for since 1990 IPC+CPC Available in IPC and CPC
- G01F 23/00 Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm +6 CPC IPC+CPC Available in IPC and CPC
- G01F 25/00 Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume +2 CPC IPC+CPC Available in IPC and CPC
- G01F 3/00 Measuring 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 G01F5/00) IPC+CPC Available in IPC and CPC
- G01F 7/00 Volume-flow measuring devices with two or more measuring ranges; Compound meters +1 CPC IPC+CPC Available in IPC and CPC
- G01F 9/00 Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine +3 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G01,2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 41,447
- CHINESE ACADEMY OF SCIENCES 32,952
- ROBERT BOSCH DE 16,470
- SAMSUNG ELECTRONICS COMPANY KR 10,052
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
- ZHEJIANG UNIVERSITY 9,529
- GUANGDONG POWER GRID CORPORATION 8,615
- TSINGHUA UNIVERSITY 7,805
- HALLIBURTON ENERGY SERVICES GROUP US 7,796
- QUALCOMM US 7,171
Top Applicants (CPC)
Class G01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382