A cryogenic refrigerator and more particularly, the cryogenic refrigerator compressor
assembly procedure and to a mechanism for supporting piston for use in such a cryogenic
refrigerator is described. Embodiments of the present invention solve the above-mentioned
drawbacks by avoiding the radial movements of the piston. The assembly procedure
of a cooler compressor comprises coating at least one piston by a material, placing
each piston in the cylinder, raising the temperature up until a predetermined temperature
so as the piston and/or its coat expands to occupy all the cylinder, fixing each
piston in the cylinder in this position until the temperature returns to ambient
temperature. Another object of this invention is the cooler compressor piston spring
having two flexure bearings separated by a gap connected together by a first and
an outer ring.
