A multi-stage system includes a block defining a cylinder, the cylinder comprising an inlet thereto and an outlet therefrom and a linear grove disposed axially within the cylinder, an infinity; a power transfer shaft configured for rotation within the cylinder, the power transfer shaft comprising a shaft portion and an infinity portion, the infinity portion defining an infinity profile; and a piston configured to reciprocate within the cylinder, the piston defining a first compression chamber and a second compression chamber within the cylinder, the piston slidably engaging the infinity profile of the power transfer shaft.