G01L MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)
Introduced: September 1968
Description
G01L covers instruments and methods for quantifying mechanical forces, stresses, torques, and related quantities in physical systems. This subclass encompasses load cells, pressure transducers, dynamometers, strain gauges, and force sensors used across industrial, scientific, and engineering applications. The classification includes devices for measuring static and dynamic mechanical parameters, as well as those determining mechanical work, power output, and efficiency in mechanical systems. Related pressure measurement technologies, particularly for fluids, fall within this scope, while purely electrical power measurement is excluded.
Title
Titles differ between systems:
IPC: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
CPC: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)
Full Title
Full titles differ between systems:
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)
Additional Content IPC
Limiting references
Weighing
Application references
Measuring blood pressure for diagnostic purposes Measuring fluid pressure within the human body other than blood pressure for diagnostic purposes Measuring muscular strength or the force of a muscular blow for diagnostic purposes Measuring tension, compression or roll-force specially adapted for metal-rolling mills , Devices for measuring, signalling, controlling, or distributing tyre pressure specially adapted for being mounted on vehicles Applications of tensometers to sewing machine elements Measuring pressure in boreholes or wells Levelling between separate points or surveyors' levels by using barometric means Measuring volume flow, mass flow or volume of fluid by measuring pressure or differential pressure , , Measuring or indicating level of liquid or fluent material by measurement of pressure Weighing apparatus wherein the balancing is effected by fluid action, with means for measuring the pressure imposed by the load on a liquid Testing of engines by monitoring pressure in cylinders or fluid ducts Meteorology Converting a pattern of forces into electrical signals
IPC and CPC are identically structured here. All 14 subcodes exist in both systems.
4 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01L 1/00 Measuring force or stress, in general (measuring force due to impact G01L5/00) +1 CPC IPC+CPC Available in IPC and CPC
- G01L 11/00 Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 +2 CPC IPC+CPC Available in IPC and CPC
- G01L 13/00 Devices or apparatus for measuring differences of two or more fluid pressure values IPC+CPC Available in IPC and CPC
- G01L 15/00 Devices or apparatus for measuring two or more fluid pressure values simultaneously IPC+CPC Available in IPC and CPC
- G01L 17/00 Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies +1 CPC IPC+CPC Available in IPC and CPC
- G01L 19/00 Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges +4 CPC IPC+CPC Available in IPC and CPC
- G01L 23/00 Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid IPC+CPC Available in IPC and CPC
- G01L 25/00 Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency +2 CPC IPC+CPC Available in IPC and CPC
- G01L 27/00 Testing or calibrating of apparatus for measuring fluid pressure +2 CPC IPC+CPC Available in IPC and CPC
- G01L 3/00 Measuring torque, work, mechanical power, or mechanical efficiency, in general IPC+CPC Available in IPC and CPC
- G01L 5/00 Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes +8 CPC IPC+CPC Available in IPC and CPC
- G01L 7/00 Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements ( transmitting or indicating the displacement of mechanical pressure-sensitive elements by electric or magnetic means G01L9/00; measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00) IPC+CPC Available in IPC and CPC
- G01L 9/00 Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements ; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means (measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00) +8 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