Rotary piston machines with a wear-resistant driving mechanism

A rotary piston machine having a plurality of bearing-free piston connecting members and incorporating a relative stroke motion within a rotating system, said rotary piston machine comprising:

• a) a cylinder drum including a plurality of cylinders, each cylinder having an interior cylinder wall and cross-sectional area bounded by said interior cylinder wall;
• b) a piston rotor being of unitary construction and including a plurality of pistons, each piston being connected to a piston carrier by a respective piston connecting member, each piston further having a cross-section substantially equivalent to the cross-sectional area of each respective cylinder, and
• whereby the relative stroke motion is created by a sweep of each respective piston along said interior cylinder wall of each respective cylinder, the relative stroke motion having a length equivalent to the sweep of each respective piston, said sweep of piston further occurring along a figure axis which exists along an axis of symmetry of said cylinder and intersects a center of said piston, said figure axis thus also being equivalent to said length of said stroke of motion;
• c) said piston rotor and said cylinder drum each rotate on separate axes of rotation, said axes of rotation being fixed relative to one another such that each piston engages a respective cylinder to form a plurality of piston and cylinder pairs, and
• whereby said plurality of pistons and said plurality of cylinders revolve in a same direction and at a same rate about separate orbits to produce a periodic change in distance between any two fixed points, one of the fixed points being associated with each piston and the other of said fixed points being associated with each respective cylinder of each respective piston and cylinder pair, the periodic change in distance is equivalent to the length of the relative stroke motion;
• and
• d) a casing for containing said cylinder drum and said piston rotor such that the axis of rotation of said cylinder drum is not aligned with the axis of rotation of said piston rotor and each of the axes of rotation remain constant relative to each other, and
• whereby a revolution of each piston and cylinder pair results in an oscillating motion of each piston within each respective cylinder along each respective figure axis filling each respective cylinder through an inlet port during a induction stage of the relative stroke motion and discharging each respective cylinder through an outlet port.

A rotary piston machine having a bearing free drive actuation mechanism for moving at least one piston within at least one cylinder forming at least one piston and cylinder pair to execute a stroke motion of said at least one piston relative to said at least one cylinder within a rotating system:

• at least one pressure tight work chamber located within each of said at least one piston and cylinder pairs, wherein each of said at least one piston therein is pivotable within each of said at least one cylinder;
• each of said at least one cylinder being located within a single-piece cylinder rotor and each rotating within an orbit at a predetermined angular speed;
• each of said piston rotating at substantially the same predetermined angular speed with the center of each of said piston remaining along a central axial line of each of said at least one cylinder belonging to the same piston and cylinder pair, but each of said at least one piston also rotating about an orbit within said rotating system which is substantially the same as but not identical to said orbit of each of said at least one cylinder;
• whereby the difference in the orbits create an oscillation within the rotating system used to execute said stroke motion of each of said at least one piston, and the length of said stroke motion being a predetermined fraction of the diameter of selectively one of said orbits.