Patent ID: 7322271
Filing Date: 2008-01-29
Classification: F04B

Abstract:
1. A rotary displacement machine with radial pistons; rotary displacement machine, comprising: a supporting structure, with a main body and a cover; a centrally mounted distributor; a rotating unit comprising a rotor provided with a number of radially extending cylindrical chambers, wherein each chamber contains a respective piston mounted for sliding movement in a first direction along a first axis coaxial with the longitudinal centerline of the respective cylindrical chamber; and means of opposing the radial thrust from the pistons, said means forming a bearing in combination with an inner ring; the bearing comprising the rotating inner ring, a stationary outer ring, and intervening rolling means, the rotating inner ring including sliding engagement means for each piston, the engagement means allowing movement in a straight line along a first direction defined by a second axis perpendicular to the first axis, wherein the engagement means comprise a slide rail attached to the inner ring, and a slide attached to the head of the piston, the slide being a flat slide, so that the relative paths of movement of the slide and the slide rail are straight paths of movement along the second axis.