Patent ID: 6827104
Filing Date: 2004-12-07
Classification: F01K,F02C,Y10T

Abstract:
An apparatus for controlling working gas flow to and from a compressor, an expander, or an integrated compressor and expander device with a drive shaft, comprising:a valve plate including a first series of inlets and a first series of outlets corresponding to the first series of inlets and a second series of inlets and a second series of outlets corresponding to the second series of inlets; an eccentric drive element centrally positioned within and linked to the valve plate, wherein the eccentric drive element is connected rigidly to the drive shaft to rotate the valve plate eccentrically when the drive shaft rotates about its axis so as to move the first and the second series of inlets and outlets in a predetermined valving pattern; and an indexing device connected to the valve plate configured to select the first or the second series of inlets and outlets for positioning over chambers of the compressor, the expander, or the integrated device.