| 摘要 |
A gas cylinder valve assembly has an outside portion positioned outside the gas cylinder and an inside portion positioned inside the gas cylinder. A canal for conducting gas passes through the inside and outside portions. The canal communicates with the inside of the cylinder through orifices in the inside portion. The canal further communicates with the inside of the gas cylinder through an opening, gas flow through which is controlled by a check valve. The check valve normally closes the opening. Gas in the cylinder flows to the outside through the orifices. During the filling operation, gas is supplied from outside under pressure. The gas under pressure opens the check valve, and gas flows both through the orifices and through the opening. |
