Regenerator and cryogenics pump
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United States of America Patent
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Sep 29, 2009
Grant Date -
Oct 4, 2007
app pub date -
Aug 24, 2005
filing date -
Aug 25, 2004
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Abstract
The invention has an object to provide a regenerator and cryogenics pump using a regenerator material which fulfills such requirements as specific heat, thermal conductivity, manufacturing easiness, strength, hardness, chemical stabilization and low cost instead of Pb which is environmentally harmful. In a regenerator 14 which contains regenerator material 16 in an internal path for refrigerant, and in which heat is exchanged between the helium gas as refrigerant, and regenerator material, regenerator material 16 is any one of Sn, Bi--Sn alloy and Ag--Sn alloy. The regenerator material 16 is spherical. Plural spheres are packed in the internal path of the regenerator 14.
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