Patent ID: 8562311

Claim:
A housed compressor comprising: an elongate compressor having a piston reciprocable in a cylinder, and an elongate hollow shell surrounding said compressor and having a gases space within, where said gases space is between the cylinder and the shell, the outer surface of said shell having at least one significant annular hollow transverse to the axis of elongation, a suction gases inlet to said shell gases space, and a suction gases pathway from said gases space into said cylinder, a compressed gases path from said cylinder out of said shell, said elongate compressor supported within said shell so that it passes said hollow, said annular hollow substantially dividing said gases space within said shell into a first region of gases space and a second region of said gases space, and substantially inhibiting gases flow between said first and second regions, said suction gases inlet opening to said second region, and said compressed gases path passing through said first region.