Details or component parts

Introduced: January 2020

Full Title

Multi-cylinder machines or pumps characterised by number or arrangement of cylinders > having cylinders in star- or fan-arrangement > Details or component parts

Classification Context

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

9 direct subcodes

Child Classifications

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F04B 1/0408 Pistons
F04B 1/0413 Cams
F04B 1/0421 Cylinders
F04B 1/0426 Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
F04B 1/0435 Arrangements for disconnecting the pistons from the actuated cam
F04B 1/0439 Supporting or guiding means for the pistons
F04B 1/0443 Draining of the housing; Arrangements for handling leaked fluids
F04B 1/0448 Sealing means, e.g. for shafts or housings
F04B 1/0452 Distribution members, e.g. valves

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