Method of assembling scroll compressors - U.S. Patent 4,811,471
An orientation insensitive scroll compressor is assembled by assembling the internal compressor as on an assembly which is inserted into a middle shell. The tubes are inserted and then the top and bottom shells are partially inserted into the middle shell and secured in place.
Etemad, Shahrokh; Yannascoli, Donald; and Hatzikazakis, Michael, "Method of assembling scroll compressors - U.S. Patent 4,811,471" (1989). Engineering Faculty Publications. 19.
Etemad, Shahrokh, Donald Yannascoli, and Michael Hatzikazakis. "Method of assembling scroll compressors." U.S. Patent 4,811,471, issued March 14, 1989.