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:
Mar. 27, 2018
Filed:
Jun. 05, 2012
Hiroaki Arai, Osaka, JP;
Hideyuki Niizato, Osaka, JP;
Koji Kitamura, Osaka, JP;
Jun Okada, Osaka, JP;
Satoshi Ashida, Osaka, JP;
Kyouichi Nakayasu, Osaka, JP;
Yoshito Yamakawa, Osaka, JP;
Hiroaki Arai, Osaka, JP;
Hideyuki Niizato, Osaka, JP;
Koji Kitamura, Osaka, JP;
Jun Okada, Osaka, JP;
Satoshi Ashida, Osaka, JP;
Kyouichi Nakayasu, Osaka, JP;
Yoshito Yamakawa, Osaka, JP;
HITACHI ZOSEN CORPORATION, Osaka-Shi, Osaka, JP;
Abstract
To make it possible to raise a door body even if it is damaged by an impact of vehicle traffic or falling objects when it is in a lowered state, and to keep the door body in a raised state even if it is damaged by a water pressure of a tsunami or a high tide when it is in a raised state. A door bodyof a floating flap gateis disposed at an opening or at an access way. When water flows in, a forward endof which swings upwards, in a direction in which the water flows in and within a plane in a height direction, around a base endthereof which serves as a center of rotation, to block the opening or the access way. The door bodyis formed from a hard polyurethane foamin the form of a sheet.