Full Title

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