IPC Class
F04 POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Description
Class F04 encompasses positive-displacement pumps and machines that transport or compress liquids and elastic fluids (gases) through mechanical action. This includes reciprocating pumps (piston and diaphragm types), rotary pumps (gear, screw, vane, and lobe pumps), and jet pumps, as well as motors and actuators powered by fluid pressure. The class covers both the machine designs themselves and their functional applications in fluid handling systems, excluding general fluid distribution systems or mere conduit components covered elsewhere in the mechanical engineering hierarchy.
Related Keywords
AIR pumpsBLADES for turbines or non-positive displacement pumpsBLOWERS [= pumps][= pumps]arrangements and adaptations of CYLINDER(S) peculiar to engines or pumpsENGINE(S)exhausters [= pumps]FAN(S) [= pumps]GAS(ES) engines or pumpsHYDRAULIC(S) engines or pumpsraising or LIFTING waterLIQUID(S) engines or pumpsLUBRICATION of engines or pumpsMOTOR(S) [= engines]NORIASPISTON(S) engines or pumpsPISTON(S) peculiar to engines or pumpsPNEUMATIC(S) pumpsPRIME MOVERS [= engines](1) PUMPS for fluidspumps for RAREFYINGROTARY -piston engines or pumpspumps for SLUDGEarrangements or adaptations of VALVES peculiar to engines or pumps
4 direct subcodes
Child Classifications
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- F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04C ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04D NON-POSITIVE-DISPLACEMENT PUMPS
- F04F PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
Top Applicants
Top 10 applicants by patent filings, 2013–2023, worldwide · Source: EPO PATSTAT
- GREE ELECTRIC APPLIANCES 5,351
- LG ELECTRONICS KR 3,502
- ROBERT BOSCH DE 3,011
- MIDEA 2,258
- MITSUBISHI ELECTRIC CORPORATION JP 1,663
- ZHUHAI LANDA COMPRESSOR COMPANY 1,639
- GREE ELECTRIC APPLIANCES, INC.OF ZHUHAI 1,573
- ZHUHAI GREE ENERGY-SAVING REFRIGERATION TECHNOLOGY RESEARCH CENTER COMPANY 1,536
- TOYOTA INDUSTRIES CORPORATION 1,347
- DAIKIN INDUSTRIES 1,325