Regenerative expansion apparatus, pulse tube cryogenic...

Details Regenerative expansion apparatus, pulse tube cryogenic... Regenerative expansion apparatus, pulse tube cryogenic...

2009-04-29

2011-12-06

Vargas, Dixomara (Department: 2858)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

Reexamination Certificate

active

08072219

ABSTRACT:
A regenerative expansion apparatus includes a regenerative tube configured to regenerate cryogenic cooling at the time of expansion of a coolant gas; a cylinder in communication with a low temperature end of the regenerative tube, the cylinder being configured to generate the cryogenic cooling by repeating compression and expansion of the coolant gas via the regenerative tube; a magnetic cold storage material filling inside the regenerative tube, the magnetic cold storage material being made of a magnetic material, the magnetic cold storage material being configured to come in contact with the coolant gas so that the cryogenic cooling is regenerated; and a magnetic shield member surrounding the magnetic cold storage material; wherein the magnetic shield member has an electric resistivity equal to or less than 50 μΩcm at a normal temperature.

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JP Office Action, App. No. 2008-151095, Dec. 14, 2010 (2 pages).
JPO Office Action, App. No. 2008-151095, Mar. 9, 2010 (2 pages).

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