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)

Child Classifications

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• F01B 1/01 with one single cylinder
• F01B 1/02 with cylinders all in one line
• F01B 1/04 with cylinders in V-arrangement
• F01B 1/06 with cylinders in star or fan arrangement
• F01B 1/08 with cylinders arranged oppositely relative to main shaft and of "flat" type
• F01B 1/10 with more than one main shaft, e.g. coupled to common output shaft
• F01B 1/12 Separate cylinder-crankcase elements coupled together to form a unit