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IPC Subgroup
F04F 5/28

Restarting of inducing action

Introduced: September 1968

Last revised: January 2006

Full Title

Jet pumps, i.e. devices in which fluid flow is induced by pressure drop caused by velocity of another fluid flow > the inducing fluid being elastic fluid > displacing liquids, e.g. containing solids, or liquids and elastic fluids > Restarting of inducing action

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Subclass:
PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS

2 direct subcodes

Child Classifications

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  • F04F 5/3 with axially-slidable combining nozzle
  • F04F 5/32 with hinged flap in combining nozzle

Top Applicants

Top 10 applicants by patent filingsfor class F04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GREE ELECTRIC APPLIANCES 5,351
  2. LG ELECTRONICS KR 3,502
  3. ROBERT BOSCH DE 3,011
  4. MIDEA 2,258
  5. MITSUBISHI ELECTRIC CORPORATION JP 1,663
  6. ZHUHAI LANDA COMPRESSOR COMPANY 1,639
  7. GREE ELECTRIC APPLIANCES, INC.OF ZHUHAI 1,573
  8. ZHUHAI GREE ENERGY-SAVING REFRIGERATION TECHNOLOGY RESEARCH CENTER COMPANY 1,536
  9. TOYOTA INDUSTRIES CORPORATION 1,347
  10. DAIKIN INDUSTRIES 1,325