Patent ID: 6435074
Filing Date: 2002-08-20
Classification: F04B

Abstract:
In a swash plate type compressor including a piston slidably received in a cylinder bore extending parallel with the driving shaft, said piston engaging the swash plate through a bearing device which swash plate is obliquely attached to the driving shaft, the rotation of the swash plate reciprocating the piston in the cylinder bore, improvements in said bearing device characterized in that said bearing device comprises a spherical seat composed of a single concave surface formed in said piston, and a substantially hemispherical shoe contacting said spherical seat, the outer peripheral surface of said she being composed of a skirt portion, a top portion having a larger finite radius of curvature than that of the spherical seat, and a transitional portion positioned between the skirt portion and the top portion, having a smaller finite radius of curvature than that of the spherical seat, sand contacting the latter.