Patent ID: 6102670
Filing Date: 2000-08-15
Classification: F04B

Abstract:
A variable fluid displacement apparatus, comprising:a housing enclosing a crank chamber, a suction chamber, and a discharge chamber;a drive shaft rotatably supported in said housing;a plate in said crank chamber, said plate having a slant angle and tiltably connected to said drive shaft, said slant angle varies in response to a pressure differential between said crank chamber and said suction chamber;a first communication path communicating said crank chamber with said discharge chamber, said first communication path having a first opening area;a first valve device for adjusting said first opening area of said first communication path responsive to a pressure in said suction chamber;a second communication path communicating said crank chamber with said suction chamber, said second communication path having a second opening area; anda second valve device closing said second opening area of said second communication path when said pressure differential between said crank chamber and said suction chamber is below a valve member's weight.