CPC Subclass Not Allocatable
F03B MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00)
Description
F03B covers turbomachinery and reciprocating devices that convert energy between flowing or pressurized liquids and mechanical work, including turbines, pumps, compressors, and hydraulic motors. This subclass encompasses both impulse and reaction turbines driven by water or other liquids, as well as positive-displacement and dynamic machines where liquid serves as the working medium. Related reciprocating engines driven by liquid pressure or flow are included, though steam and gas engines are classified separately in F03C and F03D respectively.
9 direct subcodes
Child Classifications
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- F03B 1/00 Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on blades or like rotors, e.g. Pelton wheels; Parts or details peculiar thereto
- F03B 11/00 Parts or details not provided for in, or of interest apart from, the preceding groups (controlling F03B15/00),
- F03B 13/00 Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus (if the apparatus aspects are predominant, see the relevant subclasses for such apparatus, e.g. H02K7/18); Power stations or aggregates (incorporating only machines or engines of positive-displacement type F03C; hydraulic engineering aspects E02B; )
- F03B 15/00 Controlling (controlling in general G05 )
- F03B 17/00 Other machines or engines
- F03B 3/00 Machines or engines of reaction type; Parts or details peculiar thereto
- F03B 5/00 Machines or engines characterised by non-bladed rotors, e.g. serrated, using friction
- F03B 7/00 Water wheels
- F03B 9/00 Endless-chain machines or engines
Top Applicants
Top 10 applicants by patent filingsfor class F03, 2013–2023, worldwide · Source: EPO PATSTAT
- VESTAS DK 3,718
- WOBBEN PROPERTIES DE 3,602
- SIEMENS GAMESA RENEWABLE ENERGY DK 3,016
- GE (GENERAL ELECTRIC COMPANY) US 2,594
- SIEMENS DE 1,082
- BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 709
- LM WIND POWER DK 671
- WOBBEN PROPERTIES 660
- SENVION DE 555
- BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY CN 536