Muffler/check valve assembly for scroll compressor - U.S. Patent 4,904,165
A multi-functional, single member serves as a muffler to attenuate noise, as a separator plate between the suction and discharge gases/pressures, and to carry check valve structure to avoid reverse rotation and for efficiency enhancement at off-design conditions.
Fraser, Howard H. Jr.; Lane, William R.; and Etemad, Shahrokh, "Muffler/check valve assembly for scroll compressor - U.S. Patent 4,904,165" (1990). Engineering Faculty Publications. 22.
Fraser Jr, Howard H., William R. Lane, and Shahrokh Etemad. "Muffler/check valve assembly for scroll compressor." U.S. Patent 4,904,165, issued February 27, 1990.