Invention Grant
US08973602B2 Gas shutoff device 有权
燃气关闭装置

Gas shutoff device
Abstract:
The present invention provides a gas shutoff device that prevents tampering procurement of gas or tamper due to stealing of the gas shutoff device.When an event, in which a gas pressure value of a pressure measuring unit 32 after a predetermined operation performed by a provider in installation is kept equal to or less than a first predetermined pressure value for a first predetermined time or longer and then the gas pressure value is kept equal to or more than a second predetermined pressure value for a second predetermined time or longer, happens at a predetermined number of times, the gas is shut off by a shutoff unit 39, communication with the outside is performed by an external communication unit 34, restoration is permitted by a restoring unit 38 while when there is a predetermined operation by the provider after the shutoff, the restoration permission state implemented by communicating with the outside by the predetermined operation by the provider and inputting communication of a response from the outside.
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