Hitachi, Ltd.

Kingo Moriyama

Masahiro Takebayashi

Hirokatsu Kohsokabe

Shunichi Mitsuya

Shigetaro Tagawa

Takeshi Kouno

Yasuhiro Ohshima

In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer,and a cylinder,are fed with a lubricating oil,by forming an oil-feeding groove,in the surface of the displacer,so as to extend from the central portion of the displacer,to the vicinity of a suction port,, and feeding the lubricating oil,from the central portion of the displacer,, so that the wear can be reduced.

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Shimizu, Japan

Kingo Moriyama