| 摘要 |
<p>A reciprocating fluid machine (2) in which a piston (32) is reciprocated in a cylinder bore (40). The side surface (32a) of the piston includes a cylindrical surface part (64) slidingly contacting with the cylinder bore through a cover layer (66), a ring groove part (68) fitted to a piston ring (34), and a tapered surface part (70) which is formed between the cylindrical surface part and the ring groove part, and so tilted from the cylindrical surface part toward the ring groove part as to be separated from the cylinder bore. The cover layer is so formed on the tapered surface part as to be separated from the cylinder bore.</p> |
