Valve assembly for gas cylinder
AssigneeKabushiki Kaisha Neriki
InventorsMitsunori Sakai, Masakatu Kawahara, Teruo Hatori
Life of this patent
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Abstract
A gas inlet (4), a stop value (7), a pressure reducing valve (8) and a gas outlet (5) are arranged in series within a valve casing (3). The gas outlet (5) and an outlet (7b) of said stop valve (7) are communicated with each other by a gas charging passage (10) provided with a check valve (11). The gas outlet (5) is communicated with a secondary safety valve (28) by a gas inducting passage (29). When a gas cylinder (1) is charged with a gas, a gas charging mouthpiece (14) is attached to the gas outlet (5). Thereupon, an opening or closing portion (A) provided in the gas inducting passage (29) is closed by an actuating portion (30) provided in the mouthpiece (14). Thereby, a high-pressure gas is not released from the secondary safety valve (28).
Claims10
A valve assembly for a gas cylinder comprising a valve casing (3) within which a pressure reducing valve (8) is arranged in series relative to a stop valve (7) between a gas inlet (4) and a gas outlet (5), a gas charging mouthpiece (14) provided with an actuating portion (30) being adapted to be attachable to said gas outlet (5);
- a gas charging passage (10) arranged in parallel to said pressure reducing valve (8);
- a check valve (11) disposed in said gas charging passage (10) so as to prevent a flow from said gas inlet (4) to said gas outlet (5);
- a secondary safety valve (28) adapted to release an increased pressure outside said valve casing (3) when a pressure in said gas outlet (5) increases above a predetermined value;
- a gas inducting passage (29) for making said gas outlet (5) communicate with said secondary safety valve (28);
- and
- an opening or closing portion (A) provided in said gas inducting passage (29) and adapted to be closed by said actuating portion (30) of said gas charging mouthpiece (14).
Dependencies are inferred from the claim text.