초록 ▼

A gas safety controlled device attached to the inlet side of a conventional gas controller comprising a push button, push stem and ball valve. The ball valve is urged by high gas flow to close the gas controller inlet the gas controller outlet has overflow demand. The push button and associated push

A gas safety controlled device attached to the inlet side of a conventional gas controller comprising a push button, push stem and ball valve. The ball valve is urged by high gas flow to close the gas controller inlet the gas controller outlet has overflow demand. The push button and associated push stem can be pushed downwardly on the ball valve to open the gas controller inlet.

대표청구항 ▼

In a gas controller having a casing, an inlet, a flow channel in the inlet connected to a gas supply, an outlet, and a safety valve to prevent overflow through the controller, the improvement in a safety valve comprising, a ball member in the inlet flow channel rollingly supported on an inner horizo

In a gas controller having a casing, an inlet, a flow channel in the inlet connected to a gas supply, an outlet, and a safety valve to prevent overflow through the controller, the improvement in a safety valve comprising, a ball member in the inlet flow channel rollingly supported on an inner horizontal surface of said flow channel, a seal ring in said inlet flow channel downstream of said gas supply and defining an entry into said outlet to cooperatively engage said ball member to serve as a valve seat therefor to form a check valve, said seal ring defining an opening a predetermined distance above said inner horizontal surface of said flow channel, said inlet flow channel, said seal ring, and said outlet having a central horizontal axis, said ball member having a horizontal axis parallel to said central axis, the horizontal axis of said ball member being disposed below said central axis thereby requiring an effort on the part of the ball member to seat itself, a spring member upstream of said ball member to define a limited range for the free movement of said ball member in proximity to said seat and provide sufficient space for said ball member to fall out of engagement with said valve seat by its own weight with normal flow through said inlet flow channel, a threaded bore through said casing inlet adjacent said valve seat, said threaded bore extending vertically through said casing and perpendicularly to said horizontal surface of the flow channel, a push button mounting member having threaded inner end cooperatively engageable with said threaded bore to be fixedly mounted therein, said inner end of said mounting member being provided with a chamber having are reduced truncated conical wall, said inner end having a bore through said mounting member extending substantially at right angles to the central axis of said valve seat, a push button slidably engaging the outer end of said mounting member, a push button stem slidably mounted within said bore of said mounting member attached at the outer end to said push button, said push button stem having an inner end provided with a circular flange, engageable, when depressed by said push button, with said ball member when in the closed position, a push button seal snugly disposed between said inner end of the mounting member and said push button stem, said push button seal being disposed between said flange and said conical wall of the mounting member to prevent escape of gas through said mounting member, a return spring means operatively mounted between said mounting member and said push button to resiliently urge said push button and said stem outwardly with respect to said flow channel.