Rotary-piston engines (in which the liquid exclusively displaces one or more piston reciprocating in rotary cylinders F03C1/24)

Child Classifications

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• F03C 2/02 of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents since 1980 IPC+CPC Available in IPC and CPC
• F03C 2/08 of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing since 1980 IPC+CPC Available in IPC and CPC
• F03C 2/22 of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member since 1980 IPC+CPC Available in IPC and CPC
• F03C 2/24 of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions since 1980 IPC+CPC Available in IPC and CPC
• F03C 2/30 having the characteristics covered by two or more of groups F03C2/02, F03C2/08, F03C2/22, F03C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members since 1980 +4 CPC IPC+CPC Available in IPC and CPC