Hendrik Alphons Jaspers Emmasingel, NL, Jacobus Hubertus Abrahams Emmasingel, NL: Compressor with rolling diaphragm seal. US Philips Corporation New York NY, Frank R Trifari, November 16, 1971: US3620652 (11 worldwide citation)

A hermetically sealed compressor having a rolling diaphragm seal between the piston and the cylinder with liquid support for the diaphragm. An inlet valve is formed by a piston ring incorporated in a groove in the portion of the piston wall or located between the rolling diaphragm and the working sp ...