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.

Scope Notes

Limiting references: 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