Engines with reciprocating-piston pumps; Engines with crankcase pumps

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Engines characterised by provision of pumps for charging or scavenging > Engines with reciprocating-piston pumps; Engines with crankcase pumps

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• F02B 33/04 with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
• F02B 33/06 with reciprocating-piston pumps other than simple crankcase pumps
• F02B 33/24 with crankcase pumps other than with reciprocating pistons only
• F02B 33/26 Four-stroke engines characterised by having crankcase pumps
• F02B 33/28 Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups F02B33/02 - F02B33/26