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:
Dec. 18, 2007
Filed:
Jun. 10, 2004
Rui LI, Saitama, JP;
Tomohiro Koyama, Tokyo, JP;
Toshikazu Suzuki, Ibaraki, JP;
Takayuki Tomaru, Gumma, JP;
Takakazu Shintomi, Ibaraki, JP;
Tomiyoshi Haruyama, Ibaraki, JP;
Rui Li, Saitama, JP;
Tomohiro Koyama, Tokyo, JP;
Toshikazu Suzuki, Ibaraki, JP;
Takayuki Tomaru, Gumma, JP;
Takakazu Shintomi, Ibaraki, JP;
Tomiyoshi Haruyama, Ibaraki, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
High Energy Accelerator Research Organization, Ibaraki, JP;
Abstract
A cryogenic refrigerator includes a first refrigerant tube and a second refrigerant tube each comprising two tubes that are arranged on a cooling stage substantially parallel to each other and communicate with each other through a gas passage formed in the cooling stage. Phase differences are provided to oscillating gas pressures in the first and second refrigerant tubes, to cancel vibration of the cooling stage. Thus, the cryogenic refrigerator can be provided which can effectively reduce the vibration of the cooling stage caused by the oscillating gas pressure and can reduce the size thereof.