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:
Jan. 30, 2007
Filed:
May. 14, 2004
Yuuichi Ashibe, Osaka, JP;
Takato Masuda, Osaka, JP;
Yoshihisa Takahashi, Tokyo, JP;
Shoichi Honjo, Tokyo, JP;
Masato Shimodate, Tokyo, JP;
Keisuke Etoh, Toyo, JP;
Yuuichi Ashibe, Osaka, JP;
Takato Masuda, Osaka, JP;
Yoshihisa Takahashi, Tokyo, JP;
Shoichi Honjo, Tokyo, JP;
Masato Shimodate, Tokyo, JP;
Keisuke Etoh, Toyo, JP;
Sumitomo Electric Industries, Osaka, JP;
Tokyo Electric Power Company, Tokyo, JP;
Abstract
A first flange and a second flange are superposed and fastened with a bolt and a nut in a fastening operation, to implement a fastening structure used at temperature lower than atmospheric temperature for the fastening operation. Assuming that the first flange has a thickness Land a coefficient of linear expansion α, the second flange has a thickness Land a coefficient of linear expansion α, superposed first flange and second flange have a thickness L, and the bolt has a coefficient of linear expansion α, a relation of L·α≧L+Lis satisfied, i.e. heat shrinkage of the bolt is not smaller than the total heat shrinkage of the first and second flanges. Thus, impairment of sealing property due to heat shrinkage is avoided at a flange junction used at low temperature.