Patent ID: 7225810

Claim:
An open-close valve for use in high pressurized gas containers comprises: an inlet being connected to a high pressurized gas container; an outlet being connected to a close space; an on-off operation mechanism for controlling a gas flow between said inlet and said outlet between an interrupted condition and an opening condition, being provided between said inlet and said outlet; a gas flow-in pat for connecting said on-off operation mechanism and said inlet; a gas flow-out path for connecting said on-off operation mechanism and said outlet; a flow amount controlling member comprising a containing portion being provided in said inlet; said flow amount controlling member for restricting an upper limit of gas flow amount through said inlet when said valve is open, being contained in said containing portion in a freely movable condition; an orifice, which functions when a connecting hole between said containing portion and said gas flow-out path of said on-off operation mechanism side is closed, being provided in said flow amount controlling member; and bias member for biasing said flow amount controlling member against said connecting hole; wherein said flow amount controlling member acts to restricts a flow amount by being urged against said connecting hole, when said on-off operation mechanism is switched to open the valve at a first time frame; and when gas is filled into said high pressure gas container at a second time frame, following said first time frame, after gas flow is stabilized, said flow amount controlling member is separated from said connecting hole to open said orifice; wherein a biasing force of said bias member is smaller than a first moving pressure applied to said flow amount controlling member caused by gas flowing-in pressure when said on-off operation mechanism is released during said first time frame, and wherein the biasing force of said bias member is greater than a second moving pressure applied to said flow amount controlling member caused by gas flowing during said second time frame, such that the gas flow amount controlling member is separated from the connecting hole.