Stepped annular intermediate pressure chamber for axial compliance in a scroll compressor

Abstract From the Canadian patent

A scroll compressor having a suction pressure chamber into which fluid is received substantially at suction pressure and a discharge pressure chamber from which the fluid is discharged substantially at discharge pressure including a first scroll member having a first involute wrap element projecting from a first substantially planar surface a second scroll member having a second involute wrap element projecting from a second substantially planar surface and third and fourth surfaces opposite the second substantially planar surface the third and fourth surfaces respectively located in first and second planes which are spaced apart from each other and substantially parallel with the second …