Patent ID: 6766829
Filing Date: 2004-07-27
Classification: F16K,F17C,Y10T

Abstract:
A valve assembly for a gas cylinder comprising:a housing (3) including an inlet passage (11), a shut off valve (12), an outlet passage (13), and a gas outlet (5) between which a communication is provided in the mentioned order, and further including a bypass passage (14) and a charging port (6) communicating wit each other, the inlet passage (11) and the bypass passage (14) communicating with an interior space (A) of the gas cylinder (1); a first pressure reducing valve (21), a second pressure reducing valve (22), and a first check valve (31) for retaining residual pressure provided in the outlet passage (13) and arranged in series in the mentioned order from the shut off valve (12) toward the gas outlet (5); a second check valve (32) provided in the bypass passage (14) and arranged to inhibit a flow from the interior space (A) of the gas cylinder (1) to the charging port (6); the bypass passage (14) communicating with an inter-space between the shut off valve (12) and the first pressure reducing valve (21) of the outlet passage (13); and a closing means (C) arranged to stop gas flow-out from the gas outlet (5), the closing means (C) being provided downstream of a position where it communicates with the bypass passage (14) of the outlet passage (13), or at the gas outlet (5).