Piston type compressor

Abstract

The object of the present invention is to propose a compressor in which rotation of a piston is prevented without affecting a big unbalanced load to the piston and the manufacture of the piston is simplified. The compressor comprises a housing having a cylinder bore therein, a drive shaft, a swash plate as a cam plate and a piston including a head portion and a neck portion. The housing and the piston are made of metal such as aluminium or an aluminium alloy. A rotation preventing member formed separately from the piston is mounted on the neck portion of the piston. The rotation preventing member is composed of a pair of rotation preventing portions, an abutting portion and a pair of caulking portions to mount to the neck portion. Those are made of metallic material such as iron series and formed in one body. The rotation preventing portion prevents the piston from rotating, cooperating with the contacting portion formed on the inner wall of the housing.

Dependencies are inferred from the claim text.