CPC F17C 5/04 (2013.01) [B67D 7/36 (2013.01); B67D 7/54 (2013.01); B67D 7/78 (2013.01); F04B 37/08 (2013.01); F04B 39/0276 (2013.01); F17C 2221/012 (2013.01); F17C 2223/0161 (2013.01); F17C 2227/0164 (2013.01); F17C 2227/0337 (2013.01); F17C 2265/063 (2013.01)] | 14 Claims |
1. An apparatus for compressing cryogenic fluid in at least one compression stage comprising: at least one piston and at least one sleeve delimiting at least one compression chamber; a shaft that is able to move in translation along a longitudinal axis (A) . . . the shaft also comprising at least one linking element made of material that is less thermally conductive than a constituent material of the shaft,... characterized in that, in the portion of reduced cross section, the reduced cross section is reduced by 30 to 85% compared with a cross section of the rest of the shaft, wherein the at least one linking element comprises at least one cable.
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