Rotary engine with recirculating arc roller power transfer

A rotary machine, comprising:

• a) a housing defining an inwardly facing continuously curved surface;
• b) front and rear side plates attached to the housing;
• c) a central shaft defining a central axis A, the shaft having a first end and a second end;
• d) first hub disposed on the central shaft, the first hub having a body with a volume generally defined between front and rear surfaces that are spaced apart along the central shaft, the perimeters of the front and rear surfaces defining at least one radially outwardly facing concavity through the first hub, the first hub being situated axially between the front and rear side plates;
• e) at least one bearing race disposed along the radially outwardly facing concavity through the first hub;
• and
• f) at least one contour assembly at least partially slidably disposed on the at least one bearing race disposed along the at least one radially outwardly facing concavity defined on the first hub, the at least one contour assembly being defined at least in part by a convex radially inwardly facing surface and a convex radially outwardly facing surface, the convex radially inwardly facing surface of the at least one contour assembly being configured to slide along the at least one bearing race.