Patent ID: 6508633
Filing Date: 2003-01-21
Classification: F04B

Abstract:
A swash plate type compressor of variable capacity type comprising:a housing having a plurality of cylinder bores formed therein such that said cylinder bores are arranged along a circle whose center lies on a centerline of said housing; a rotary drive shaft which is rotatably supported by said housing such that an axis of rotation of said rotary drive shaft is aligned with said centerline of said housing; a swash plate which is carried by said rotary drive shaft such that an angle of inclination of said swash plate with respect to a plane perpendicular to said axis of rotation of said rotary drive shaft is variable, and such that said swash plate is rotated together with said rotary drive shaft; a plurality of pistons which are slidably fitted in the respective cylinder bores and which engage a radially outer portion of said swash plate, each of said pistons being reciprocated between a compression stroke end and a suction stroke end by rotation of said swash plate, said radially outer portion of said swash plate including a compression-end circumferential part which engages each piston when each piston is located at said compression stroke end; a swash plate angle adjusting device for adjusting said angle of inclination of said swash plate between a minimum inclination angle and a maximum inclination angle, and wherein said swash plate has a first center point at the maximum inclination angle and a second center point at the minimum inclination angle, each of said first and second center points being an intersection between an intermediate plane of said swash plate which is intermediate in a direction of thickness thereof and a centerline of said swash plate, (a) said first center point and said second center point being located on said axis of rotation of said rotary drive shaft, or (b) said first center point being located on said axis of rotation or offset from said axis of rotation on one side of said axis of rotation, which one side corresponds to said compression-end circumferential part of said swash plate, while said second center point is offset a larger distance from said axis of rotation than said first center point.