公开(公告)号：EP0838590A4

公开(公告)日：2000-02-23

申请号：EP96913701

申请日：1996-05-08

Applicant: KK

Inventor： KATO MASAFUMI ,  ITO AKICHIKA

IPC: F04B27/08

CPC classification number: F04B27/0886 ,  F04B27/0878 ,  F05C2201/025 ,  F05C2201/0475 ,  F05C2201/0493 ,  F05C2203/04 ,  F05C2203/086 ,  F05C2253/12

Abstract: A compressor is provided with cylinder blocks (30, 31) having cylinder bores (41, 42). A driving shaft (39) is supported rotatably on the cylinder blocks (30, 31). A swash plate (40) is fixed to the driving shaft (39) so that the swash plate can be rotated unitarily with the shaft. A piston (1) is held slidably in the cylinder bores (41, 42). Shoes (44) are provided slidably between the piston (1) and swash plate (40). The rotation of the swash plate (40) causes the shoes to reciprocate the piston. The piston (1) comprises aluminum or an aluminum alloy as a base material. The piston (1) is provided with recesses (2) for retaining the shoes (44) slidably. The retaining recesses (2) are provided with a covering layer (6) formed out of tin as a main component.