The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2009
Filed:
Aug. 24, 2005
Yoshinobu Murayama, Chigasaki, JP;
Shinji Furuya, Chigasaki, JP;
Hidetoshi Morimoto, Chigasaki, JP;
Junpei Yuyama, Chigasak, JP;
Yoshinobu Murayama, Chigasaki, JP;
Shinji Furuya, Chigasaki, JP;
Hidetoshi Morimoto, Chigasaki, JP;
Junpei Yuyama, Chigasak, JP;
Ulvac Cryogenics, Inc., Kanagawa, JP;
Ulvac, Inc., Kanagawa, JP;
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 regeneratorwhich contains regenerator materialin an internal path for refrigerant, and in which heat is exchanged between the helium gas as refrigerant, and regenerator material, regenerator materialis any one of Sn, Bi—Sn alloy and Ag—Sn alloy. The regenerator materialis spherical. Plural spheres are packed in the internal path of the regenerator