Patent ID: 8287248

Claim:
A compressor comprising: an intake passage, a compression mechanism and a outlet passage in fluid communication; the compression mechanism being configured and positioned to receive a vapor from the intake passage and provide vapor at a higher pressure to the outlet passage; a valve configured and positioned to adjust compressor capacity, the valve comprising: a piston positioned in a cylinder, the piston dividing the cylinder into a first chamber and a second chamber, and a position of the piston in the cylinder corresponding to a desired compressor capacity; a valve body connected to the piston by a shaft, the shaft comprising an interior reservoir having an opening near the piston, and the interior reservoir being configured and positioned to store a fluid; and a system configured and positioned to permit the fluid from the interior reservoir of the shaft to flow into the first chamber to maintain the position of the piston in the cylinder, the system comprising: a cylindrical member, the member being positioned in the piston; a cylindrical rod, the rod slidably engaging the member and the interior reservoir of the shaft the rod and member having a first orientation to prevent flow of fluid from the interior reservoir to the first chamber and the rod and member having a second orientation to enable flow of fluid from the interior reservoir to the first chamber; the rod and member being positioned in the second orientation in response to movement of the piston in the cylinder; the rod comprising an internal passageway for fluid from a fluid source to the interior reservoir of the shaft; the member comprising an aperture configured and positioned to provide fluid communication between an exterior portion of the member and an interior portion of the member; and the second orientation of the rod and member being configured to permit fluid to flow from the interior reservoir through the aperture to the first chamber.