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:
Apr. 15, 2008
Filed:
Jul. 27, 2006
Yuzo Fukuda, Hitachi, JP;
Hiromitsu Seino, Iwaki, JP;
Kazuo Saitoh, Kodaira, JP;
Hiroyuki Tanaka, Mito, JP;
Tsuyoshi Wakuda, Hitachinaka, JP;
Norihide Saho, Tsuchiura, JP;
Michiya Okada, Mito, JP;
Yuzo Fukuda, Hitachi, JP;
Hiromitsu Seino, Iwaki, JP;
Kazuo Saitoh, Kodaira, JP;
Hiroyuki Tanaka, Mito, JP;
Tsuyoshi Wakuda, Hitachinaka, JP;
Norihide Saho, Tsuchiura, JP;
Michiya Okada, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention provides a low temperature probe having a high sensitivity by reducing a heat intrusion into a receive coil. A heat making an intrusion into a coil is suppressed by inserting a heat radiation shield in which a temperature is controlled at about 100 K to a portion between an outer container of a probe and a coil portion. A heat radiation shield bore sleeve is provided in a heat radiation bore, is connected to the heat radiation shield, and is cooled by a second heat exchanger. Further, the coil portion is cooled by a first heat exchanger. In preparation for a contraction at a time of being cooled, the outer container, the heat radiation shield and the coil portion are connected by using a fixing portion, and a heat relieving mechanism or a contraction relieving mechanism is provided in a root side (an opposite side to the fixing portion) of the heat radiation shield and the coil portion. The fixing portion is formed in a shape and made of a material having a small heat intrusion amount and having a small heat contraction.