Details, component parts, or accessories

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Subclass:: NON-POSITIVE-DISPLACEMENT PUMPS

Filing statistics

IPC F04D 29/00 belongs to the parent subclass F04D, which recorded 249,965 patent applications worldwide between 2013 and 2023. Annual filings grew from 13,895 in 2013 to 27,435 in 2023 (+97%), peaking at 32,121 applications in 2020. The most active applicants in class F04 are GREE ELECTRIC APPLIANCES (5,351 applications), LG ELECTRONICS (3,502 applications) and ROBERT BOSCH (3,011 applications).

Source: EPO PATSTAT, worldwide filings

12 direct subcodes

Child Classifications

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F04D 29/02 Selection of particular materials
F04D 29/04 Shafts or bearings, or assemblies thereof
F04D 29/05 Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
F04D 29/06 Lubrication
F04D 29/08 Sealings
F04D 29/18 Rotors
F04D 29/26 Rotors specially adapted for elastic fluids
F04D 29/4 Casings; Connections for working fluid
F04D 29/58 Cooling; Heating; Diminishing heat transfer
F04D 29/6 Mounting; Assembling; Disassembling
F04D 29/66 Combating cavitation, whirls, noise, vibration, or the like; Balancing
F04D 29/7 Suction grids; Strainers; Dust separation; Cleaning

Top Applicants

Top 10 applicants by patent filingsfor class F04, 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