F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
Introduced: September 1968
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- Subclass:
- MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
Description
F01B encompasses machines and engines operating on positive-displacement principles, where a fixed volume of fluid is trapped and displaced in each cycle to produce work. This subclass covers steam engines, reciprocating engines, rotary positive-displacement machines, and other mechanisms where displacement is the primary operating characteristic. The classification includes piston engines, rotary vane machines, screw compressors operating in reverse as expanders, and similar devices that rely on mechanical displacement rather than dynamic pressure principles. F01B excludes dynamic machines (turbines, centrifugal compressors) and internal combustion engines with spark or compression ignition, which are classified elsewhere.
Additional Content
Rotary-piston or oscillating-piston machines or engines Non-positive-displacement machines or engines, e.g. steam turbines Internal-combustion engines Combustion-product engine plants Machines or engines, other than of positive-displacement type, for liquids Positive-displacement engines driven by liquids Wind motors Positive displacement machines for liquids Rotary-piston, or oscillating-piston, positive-displacement machines for liquids
16 direct subcodes
Child Classifications
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- F01B 1/00 Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
- F01B 11/00 Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
- F01B 13/00 Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion
- F01B 15/00 Reciprocating-piston machines or engines with movable cylinders other than provided for in group
- F01B 17/00 Reciprocating-piston machines or engines characterised by use of uniflow principle
- F01B 19/00 Positive-displacement machines or engines of flexible-wall type
- F01B 21/00 Combinations of two or more machines or engines
- F01B 23/00 Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01B 25/00 Regulating, controlling or safety means
- F01B 27/00 Starting of machines or engines
- F01B 29/00 Machines or engines with pertinent characteristics other than those provided for in main groups
- F01B 3/00 Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B 31/00 Component parts, details or accessories not provided for in, or of interest apart from, other groups
- F01B 5/00 Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a circle centred on main shaft axis
- F01B 7/00 Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
- F01B 9/00 Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups
Top Applicants
Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 8,496
- UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
- SAFRAN AIRCRAFT ENGINES FR 5,503
- TOYOTA MOTOR CORPORATION 4,556
- SIEMENS DE 3,992
- HYUNDAI MOTOR COMPANY KR 3,929
- RAYTHEON TECHNOLOGIES CORPORATION US 3,534
- FORD GLOBAL TECHNOLOGIES US 3,407
- TOYOTA MOTOR CORPORATION JP 3,042
- WEICHAI POWER COMPANY 2,888