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. 17, 1979
Filed:
Apr. 04, 1978
Kenji Ohsaka, Tokyo, JP;
Koichi Hagiwara, Nagasaki, JP;
Toshikazu Niwa, Yokosuka, JP;
Shunsuke Yamagata, Fujisawa, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a membrane structure for a liquid gas storage tank. The structure is characterized in that the bottom wall of the membrane comprises a number of elongated corrugated members arranged in a square-lattice pattern, and each member has a pair of spaced, parallel, longitudinally extending corrugations. Also, the members are assembled by joining one end of each corrugated member to substantially the mid-point of another corrugated member extending normal thereto, and each opening between the corrugated members is closed and made liquid tight by a thin plate. Preferably, each corrugated member is a sheet member of U-shaped cross-section, having a pair of vertical flanges of equal height, located between a pair of sheet members of L-shaped cross-section which are arranged back to back in spaced, parallel relationship, the top edges of respective adjacent vertical flanges of said L-shaped and said U-shaped members being continuously welded together.