Abstract: A transmission comprising at least one rim 1 and at least one wheel 2. An outside surface of the wheel 2 is adapted to engage with an inside surface of the rim 1. The wheel 2 is rotatable about a first axis B and the rim 2 is rotatable about a second axis A. The second axis A is at a distance from the first axis B. The inside surface of the rim 1 has a cyclic polygonal shape with an angle between each adjoining side 4 of the polygon being greater than 90°. The outer surface of the wheel 2 has a cyclic polygonal shape with an angle between each adjoining side 6 of the polygon being greater than 90°. Each side 6 of the wheel 2 engaging with a side 4 of the rim 1 of equal length during rotation of said transmission.

Abstract: A rotary machine (1) in the form of an expander is shown. The Expander Induces a housing (5) having a cavity (9), inlet and outlet ducts (11, 12) communicating with the cavity (9), a rotor (2) having a rotor axis (A), a number of vanes (15a, 15b, 15c) movably received in respective grooves (18) in the rotor (2) and articulately connected about an axis (C) to one end of a control arm (14a, 14b, 14c) and in the other end rotatable supported in a fixed shaft (24) extending centrally through the cavity (9) in the housing (5), and at least one working chamber (9a) which is part of the cavity (9), The housing (5) includes an internally cylindrical intermediate part (5c), which part interact with the rotor (2) and the vanes (15a, 15b, 15c). The rotor (2) forms a reel configuration having respective radially extending flange portions (2a?, 2b?) which are rotatable together with the vanes, and against which the respective end surfaces of the vanes act.

Abstract: A rotary machine (1) in the form of an expander is shown. The Expander Induces a housing (5) having a cavity (9), inlet and outlet ducts (11, 12) communicating with the cavity (9), a rotor (2) having a rotor axis (A), a number of vanes (15a, 15b, 15c) movably received in respective grooves (18) in the rotor (2) and articulately connected about an axis (C) to one end of a control arm (14a, 14b, 14c) and in the other end rotatable supported in a fixed shaft (24) extending centrally through the cavity (9) in the housing (5), and at least one working chamber (9a) which is part of the cavity (9), The housing (5) includes an internally cylindrical intermediate part (5c), which part interact with the rotor (2) and the vanes (15a, 15b, 15c). The rotor (2) forms a reel configuration having respective radially extending flange portions (2a?, 2b?) which are rotatable together with the vanes, and against which the respective end surfaces of the vanes act.

Abstract: A rotary-piston machine (10) comprising a housing (5) having a cavity (9), a rotor (2) received in the housing (5), which rotor (2) having a rotor axis (A) and a peripheral surface (21), inlet and outlet passages (3, 4) in communication with said cavity (9), one or more vanes (1) radially slideable received in slots (11) in the rotor (2), each vane (1) extending radially from the internal surface (20) of the housing (5) to the rotor axis (A), and at least one working chamber (9a) being part of the cavity (9) and is defined by the internal surface (20) of the housing (5), the peripheral surface (21) of the rotor (2) and the side surface of at least one vane (1).