Patent ID: 7699585

Claim:
A swash plate type compressor comprising: a housing having a cylinder bore, a suction pressure region, a discharge pressure region and a crank chamber; a drive shaft rotatably supported by the housing, wherein the drive shaft includes: a cylindrical hollow first shaft portion; and a cylindrical hollow second shaft portion fitted in the first shaft portion, a lug plate secured to the drive shaft; a swash plate tiltably coupled to the lug plate; a piston coupled to the swash plate and reciprocally accommodated in the cylinder bore, wherein refrigerant in the discharge pressure region is introduced into the crank chamber through a supply passage while the refrigerant in the crank chamber is drawn out to the suction pressure region through a bleed passage for controlling pressure in the crank chamber, whereby inclination angle of the swash plate is changed; and a heat-generating sliding portion provided in the crank chamber, wherein the supply passage includes: a communication port that communicates with the crank chamber; and a first throttle portion for throttling the refrigerant, wherein a part of the bleed passage is defined by an inner peripheral surface of the first shaft portion and an outer peripheral surface of the second shaft portion, wherein a part of the supply passage is defined by an inner peripheral surface of the second shaft portion.