Abstract: The rotary piston (6) with rotation axis C performs a relative rotation in an annular cylinder (1) with rotation axis O which is displaced with respect to said piston axis (C) by an eccentricity e. The cylinder (1) comprises three chambers (2) having cylindrical surfaces (3) which engage the piston (6). The piston (6) has two semi-cylindrical surfaces connected by connecting surfaces (8). Each connecting surface (8) has a shape generated by replacing one of the three rollers with a machine tool (5') and displacing the piston with the other two rollers (5). The surface of said piston (6) is continually supported on three rollers (5) of said cylinder (1). The relative position, i.e. the relative movement of said piston (6) and said cylinder (1), is rigidly determined by the support of the piston on rollers (5) and by the eccentricity (e) between the piston and the cylinder axes. The machine can be used as a combustion engine, a volumetric pump, or as a hydraulic motor.

Abstract: A dynamic ring balancer for a machine shaft, including an annular case fixedly attachable to the shaft with a central aperture sized to receive the shaft therethrough. The case has an annular chamber extending about the case aperture and containing a pair of eccentrically weighted balancing rings rotatably mounted within the annular chamber. The rings are rotatable relative to each other and the case. A pair of turbine wheels are mounted at an outer wall of the case and are each selectively rotatable in both rotational directions in response to engagement by pressurized air flows. The air flows for each wheel are selectively applied by a stationary manifold as the wheels pass by the manifold while revolving with the case. A pair of reduction gear assemblies are mounted within the case and each drivably interconnects one of the wheels and the corresponding ring to convert rotation of the wheel into rotation of the ring.

Abstract: A dynamic ring balancer for a machine shaft, including an annular case fixedly attachable to the shaft with a central aperture sized to receive the shaft therethrough. The case has an annular chamber extending about the case aperture and containing a pair of eccentrically weighted balancing rings rotatably mounted within the annular chamber. The rings are rotatable relative to each other and the case. A pair of turbine wheels are mounted at an outer wall of the case and are each selectively rotatable in both rotational directions in response to engagement by pressurized air flows. The air flows for each wheel are selectively applied by a stationary manifold as the wheels pass by the manifold while revolving with the case. A pair of reduction gear assemblies are mounted within the case and each drivably interconnects one of the wheels and the corresponding ring to convert rotation of the wheel into rotation of the ring.