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:
Aug. 02, 2011
Filed:
Jul. 08, 2008
Kenji Nakano, Kodaira, JP;
Yoshito Sameda, Yokohama, JP;
Yukio Takanohashi, Hachioji, JP;
Hiroto Uyama, Tokyo, JP;
Masaaki Ishino, Machida, JP;
Kenji Nakano, Kodaira, JP;
Yoshito Sameda, Yokohama, JP;
Yukio Takanohashi, Hachioji, JP;
Hiroto Uyama, Tokyo, JP;
Masaaki Ishino, Machida, JP;
Toshiba Toko Meter Systems Co., Ltd., Tokyo, JP;
Abstract
According to the present invention, mistaken detection of a gas leak can be prevented even when using an appliance which has been newly installed in a dwelling receiving a gas supply, and whereby a gas leak can be detected rapidly, efficiently and accurately. The characteristics extraction meansextracts characteristics of a gas flow including a combination of the instantaneous flow volume data and the instantaneous flow volume time differential value, on the basis of the data obtained by the flow volume measurement means, pressure measurement means, instantaneous flow volume time differential operation meansand pressure time differential operation means. The leak detection meanscompares the characteristics data for respective types of gas appliance or for a gas leak registered in the storage meanswith the characteristics extracted by the characteristics extraction means, and if a matching is not achieved, further judges whether there is a flow volume variation or nozzle variation, and whereby it judges whether there is a gas leak or whether an unregistered appliance is in use. If occurrence of a gas leak, the warning meansissues a warning. If an unregistered appliance is in use, the characteristics data forming the basis of the judgment is registered as a new characteristics data in the storage meansby the characteristics data registration means