Valve assembly with check valve for gas cylinder

A valve assembly with a check valve comprising:

• a housing (4) having a bore (31) for attaching an inlet bore (6,7), a shut off valve chamber (10,21), an outlet bore (18) and a check valve (80);
• a cylinder (32) having an outer surface, which is hermetically attached into the attaching bore (31) and is made to advance and retreat between a take-out position (A) and a charging position (B);
• a check valve chamber (28) formed within the cylinder (32), the check valve chamber (28) having a chamber inlet (40) which communicates with the inlet bore (6,7) through the shut off valve chamber (10,21) and a chamber outlet (41) which communicates with the outlet bore (18);
• a check valve seat (42) formed on a periphery of the chamber inlet (40);
• a check valve member (29) inserted into the check valve chamber (28);
• a check spring (43) inserted into the check valve chamber (28) and resiliently pushing the check valve member (29) toward the check valve seat (42);
• an actuation portion (50) provided in an outer surface of the cylinder (32) between the attaching bore (31) and the cylinder (32), the actuation portion (50) being pushed to retract the cylinder (32) from the take-out position (A) to the charging position (B);
• and
• a receiving portion (46) which receives the check valve member (29) on a halfway while the cylinder (32) is retreating from the take-out position (A) to the charging position (B).