| 摘要 |
A piston-type compressor has at least two cylinders formed in a cylinder block which is formed in a compressor housing. A piston is slidably disposed within each of the cylinders. Each of the pistons includes a cylindrical main body and an engaging portion axially extending from the cylindrical body. A drive shaft is rotatably supported in the cylinder block. A bearing couples the plate to each of the pistons, so that the pistons reciprocate within the cylinder bores upon rotation of the plate which is tiltably connected to the drive shaft. The piston includes a first aperture formed in a periphery surface of cylindrical body thereof; a second aperture formed in an interior the cylindrical body thereof, so that the second aperture communicates with the first aperture; and a cover plate member secured to the one axial end thereof for covering the second aperture. Therefore, the configuration obtains lightweight pistons while simultaneously preventing reducing the efficiency of the compressor.
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