Patent ID: 6312237
Filing Date: 2001-11-06
Classification: F04C

Abstract:
A displacement type fluid machine comprising a displacer and a cylinder disposed between end plates such that a space is formed by an inner wall surface of said cylinder and an outer wall surface of said displacer when a center of said cylinder is located on a center of said displacer, and a plurality of working chambers is formed when a positional relationship between said displacer and said cylinder is directed to a gyration position, a suction port for introducing a fluid to one of said working chambers, a discharge port for discharging said fluid from said one of said working chambers, a groove formed in a surface of said displacer opposite to one of said end plates so as to extend from a central portion of said displacer toward a tip portion on the suction port side to a position for communicating with said suction port by a gyration movement of said displacer, and means for feeding a lubricating oil to said groove from said central portion of said displacer.