Patent ID: 6406271
Filing Date: 2002-06-18
Classification: F04B

Abstract:
An axial-piston pump comprising:a rotatable shaft; a rotatable cylinder barrel assembly, having a cylinder barrel and a piston assembly received in a piston bore of said cylinder barrel; a swashplate, having an inclined upper surface for engaging said piston assembly; said piston assembly, comprising a piston, connected to a shoe by a substantially spherical joint means; said substantially spherical joint means comprising a substantially spherical ball and a concave substantially spherical socket; said ball and said spherical socket being dimensioned such that the internal dimensions of said spherical socket approximate the size and shape of said ball; said spherical socket comprising a material which allows for elastic deformation of the socket so that the socket is capable of substantially returning to its original shape after being slightly deformed; said spherical socket being formed to its final shape before being joined with said ball; said spherical socket encircles more than one half of said ball, but not more than 205 degrees.