Patent ID: 8382449

Claim:
A fluid machine with radial cylinders, comprising: cylinders being fixed with respect to a body wherein the cylinders are peripherally spaced in a rotation plane of a crank rotating with a driving shaft of the machine; elements distributing a fluid; a piston of each cylinder placed in contact with a surface of said crank by a sliding member, the piston of each cylinder being placed within a jacket of the cylinder; a guide and sealing area which is formed on the jacket and is small with respect to the side surface of the piston, the guide and sealing area comprising an annular edge projecting from an inner surface of the jacket; and a sealing ring formed on the jacket and housed in an annular slot which is parallel and attached to the annular edge; and rings maintaining the contact between the pistons and the crank, wherein the piston moves according to a position of the sliding member on the crank, and a radius of the crank, as an effect of rotation of the crank, determines an oscillation of an axis of the piston with respect to a radial axis that bisects the jacket and wherein the oscillation occurs around a point of intersection of a containment plane of the annular edge with the axis of the jacket.