Abstract: The invention relates to a rotor body, especially for the rotor of the starter or the starter-generator of an internal combustion engine. Said rotor body is provided with a hub (4) that extends coaxially with respect to the axis of rotor rotation (A). The inventive rotor body comprises a rotation-symmetric base body (5) that forms the hub (4) and one or more blades (1, 2, 3) that all have the same thickness in the direction of the rotor rational axis (A).

Abstract: A rotary internal combustion engine includes a housing having a chamber defined by an inner surface of oval outline in which a plurality of pistons are arranged, each having a wall portion facing the internal surface. The pistons are linked to each other at adjacent ends by combined sealing and linkage means, which are in sealing contact with the respective piston ends and with the internal surface of the housing. A shaft journalled in the housing extends coaxially through the chamber, and motion transmitting means are provided between the shaft and the combined sealing and linkage means rigidly connected at inner portions thereof to the shaft and carrying the combined sealing and linkage means movable towards and away from the shaft axis. The engine includes further means for transmitting radial forces acting on the pistons to the shaft and comprising arm means turnably mounted on the shaft and pivotally connected to the pistons intermediate opposite ends of the latter.