Valve assembly with check valve for gas cylinder

摘要

A cylinder (32) is hermetically attached into an attaching bore (31) formed within a housing (4) and is made to advance and retreat between a take-out position (A) and a charging position (B). A check valve chamber (28) is formed within the cylinder (32). A check spring (43) resiliently pushes a check valve member (29) inserted into the check valve chamber (28) toward a check valve seat (42). The cylinder (32) has an outer surface provided with an actuation portion (50). If the actuation portion (50) is pushed, it retracts the cylinder (32) toward the charging position (B). Provided at a position opposing to the check valve member 29 through a chamber inlet (40) of the check valve chamber (28) is a receiving portion (46), which receives the check valve member (29) on a halfway while the cylinder (32) is retreating.