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:
Nov. 04, 1997
Filed:
Apr. 12, 1996
Tsukushi Hara, Tokyo-to, JP;
Masahiko Nakade, Tokyo-to, JP;
Takeshi Ohkuma, Tokyo-to, JP;
Kenji Tasaki, Kawasaki, JP;
Takashi Yazawa, Kawasaki, JP;
Hideaki Maeda, Kawasaki, JP;
Eriko Yoneda, Kawasaki, JP;
Shunji Nomura, Kawasaki, JP;
Toshihiro Kashima, Otsu, JP;
Atsuhiko Yamanaka, Otsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Tokyo Electric Power Co., Ltd., Tokyo-to, JP;
Toshiba Corporation, Tokyo-to, JP;
Abstract
A bobbin for superconducting coils, which is made of a fiber-reinforced plastic material containing: (1) a matrix resin; (2) a polyethylene fiber having a negative thermal expansion coefficient in the fiber lengthwise direction, the angle between the polyethylene fiber and the longitudinal axis of the bobbin being in the range of .+-.35.degree. to 90.degree.; and (3) a substance having an elastic modulus higher than that of the polyethylene fiber. The bobbin of the present invention is useful for superconducting coils because it only exhibits a quite low degree of deformation, even when used under external stress at cryogenic temperatures.