Patent ID: 6227811
Filing Date: 2001-05-08
Classification: F04B

Abstract:
A variable capacity swash plate compressor, comprising:a cylinder block having a plurality of cylinder bores arranged radially and circumferentially therein;a housing mounted adjacent said cylinder block and cooperating with said cylinder block to define an air-tight sealed crank chamber;a drive shaft rotatably supported by said housing and said cylinder block;a rotor mounted on said drive shaft;a swash plate connected to said rotor and slidably mounted on said drive shaft to thereby change an inclination angle thereof in response to changes of pressure in the crank chamber of said housing;a supporting and adjusting means disposed between said rotor and said swash plate for changing the inclination angle of said swash plate;a plurality of pistons reciprocatively disposed in each of the cylinder bores of said block, each piston having a cylindrical body and a bridge portion connected to the body and having a recess and a pair of shoe pockets formed in the recess;a plurality of shoes disposed in the shoe pockets of the recess of each said piston to come into contact with said swash plate for converting rotation of said swash plate into reciprocation of said pistons;a lower back edge portion is provided on the body of each said piston extending in a line through an apex and an entrance of the shoe pocket adjacent to the body and continuing to extend in perpendicular relationship proximate to a line defining an inner surface of the respective cylinder bore provided for each said piston; andwherein said swash plate is provided with a depressed portion located radially inward from said shoes such that contact between said swash plate and said lower back edge portion of each said piston is prevented.