Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate
2011-08-02
2011-08-02
Williams, Hezron (Department: 2856)
Measuring and testing
With fluid pressure
Leakage
C073S049100
Reexamination Certificate
active
07987698
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 means5extracts 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 means1, pressure measurement means2, instantaneous flow volume time differential operation means3and pressure time differential operation means4. The leak detection means7compares the characteristics data for respective types of gas appliance or for a gas leak registered in the storage means6with the characteristics extracted by the characteristics extraction means5, 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 means9issues 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 means6by the characteristics data registration means8.
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Ishino Masaaki
Nakano Kenji
Sameda Yoshito
Takanohashi Yukio
Uyama Hiroto
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Toshiba Toko Meter Systems Co., Ltd.
West Paul
Williams Hezron
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