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.

Date of Patent:
Apr. 18, 2006

Filed:

Mar. 04, 2004
Applicants:

Hiroshi Morita, Mito, JP;

Michiya Okada, Mito, JP;

Masae Kiryu, Hitachi, JP;

Hiromitsu Seino, Iwaki, JP;

Inventors:

Hiroshi Morita, Mito, JP;

Michiya Okada, Mito, JP;

Masae Kiryu, Hitachi, JP;

Hiromitsu Seino, Iwaki, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A double-tubular third transfer tube is provided in the transfer tube storage conduit, and a first transfer tube, second transfer tube and fourth transfer tube are installed in its interior. Further, pressure control valves are arranged in the portion of normal temperature, thereby reducing the amount of heat intrusion and the coolant temperature. This arrangement cryogenically cools down the irradiation coil and reception coil, without damaging the compressor, and ensures a low-temperature probe to be manufactured.


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