CPC Main Group
F01C 21/00 Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
12 direct subcodes
Child Classifications
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- F01C 21/02 Arrangements of bearings (bearing constructions F16C)
- F01C 21/04 Lubrication (of machines or engines in general F01M)
- F01C 21/06 Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
- F01C 21/08 Rotary pistons (reciprocating pistons in general F16J)
- F01C 21/10 Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
- F01C 21/18 Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet