MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type F01C; of non-positive-displacement type F01D; internal-combustion engines F02B; combustion-product engine plants F02G; machines or engines, other than of positive-displacement type, for liquids F03B; positive-displacement engines driven by liquids F03C; wind motors F03D; positive-displacement machines for liquids F04B; rotary-piston, or oscillating-piston, positive-displacement machines for liquids F04C)

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 (F01B3/00, F01B5/00 take precedence) IPC+CPC Available in IPC and CPC
• F01B 11/00 Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type +4 CPC IPC+CPC Available in IPC and CPC
• F01B 13/00 Reciprocating-piston machines or engines with rotating cylinders in order to obtain the reciprocating-piston motion IPC+CPC Available in IPC and CPC
• F01B 15/00 Reciprocating-piston machines or engines with movable cylinders other than provided for in group F01B13/00 +3 CPC IPC+CPC Available in IPC and CPC
• F01B 17/00 Reciprocating-piston machines or engines characterised by use of uniflow principle IPC+CPC Available in IPC and CPC
• F01B 19/00 Positive-displacement machines or engines of flexible-wall type IPC+CPC Available in IPC and CPC
• F01B 21/00 Combinations of two or more machines or engines (F01B23/00 takes precedence) IPC+CPC Available in IPC and CPC
• F01B 2170/00 Steam engines, e.g. for locomotives or ships 2nd only +1 CPC CPC only CPC only
• F01B 2250/00 Accessories of steam engines; Arrangements or control devices of piston pumps, compressors without crank shafts or condensors for so far as they influence the functioning of the engines 2nd only +9 CPC CPC only CPC only
• F01B 23/00 Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby IPC+CPC Available in IPC and CPC
• F01B 25/00 Regulating, controlling or safety means (controlling combustion engines F02D) IPC+CPC Available in IPC and CPC
• F01B 27/00 Starting of machines or engines (starting combustion engines F02N) IPC+CPC Available in IPC and CPC
• F01B 29/00 Machines or engines with pertinent characteristics other than those provided for in preceding main groups IPC+CPC Available in IPC and CPC
• F01B 3/00 Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis +4 CPC IPC+CPC Available in IPC and CPC
• F01B 31/00 Component parts, details or accessories not provided for in, or of interest apart from, other groups +1 CPC IPC+CPC Available in IPC and CPC
• F01B 5/00 Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a circle centred on main shaft axis +2 CPC IPC+CPC Available in IPC and CPC
• F01B 7/00 Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (in opposite arrangement relative to main shaft F01B1/08) IPC+CPC Available in IPC and CPC
• F01B 9/00 Reciprocating-piston machines or engines characterised by connections between pistons and main shafts, not specific to groups F01B1/00 - F01B7/00 IPC+CPC Available in IPC and CPC