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:
Jul. 18, 1995
Filed:
Jul. 18, 1994
Mamoru Ohara, Kudamatsu, JP;
Morishige Hattori, Kudamatsu, JP;
Yoshinao Okumoto, Kudamatsu, JP;
Masato Okazaki, Kudamatsu, JP;
Michifumi Takeichi, Kudamatsu, JP;
Katsutoshi Horihata, Kudamatsu, JP;
Kengi Kimura, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A railway car body structure running at a high speed and a production method thereof. To reduce vibration and noise and to prevent influences of outdoor pressure variations on passengers in the case of a high-speed railway car, the weight of the car body structure must be reduced and its pressure resistance must be improved. Each of the side units, roof unit and end unit and floor plates of an underframe of the car body structure includes plate members obtained by joining two surface materials, a core material and binding materials through metal-to-metal bonding. The sheet thickness of the surface material on an outdoor side is greater than a sheet thickness of the surface material on an indoor side. The plate members are constructed as a block, and a plurality of blocks are joined so as to form the side units, roof unit or the floor plates of the underframe.