Abstract: A method and apparatus especially useful for supplying inert gas to a highly pressurized pressure vessel, such as a hybrid inflator for an automotive airbag module, and weld sealing the gas passage or opening therein to avoid or substantially eliminate weld cracks. The apparatus for accomplishing same comprises no moving parts and the welding is accomplished by utilizing either a groove or a conical rise feature formed into the end plug or wall surface of the pressure vessel wall surrounding the gas passage or opening so that no additional filler material is required to obtain the weld seal. The method and apparatus may also be used to weld seal low or non-pressurized vessels as well as vacuum vessels.

Abstract: A method and apparatus especially useful for supplying inert gas to a highly pressurized pressure vessel, such as a hybrid inflator for an automotive airbag module, and weld sealing the gas passage or opening therein to avoid or substantially eliminate weld cracks. The apparatus for accomplishing same comprises no moving parts and the welding is accomplished by utilizing a groove feature formed into the surface of the pressure vessel wall surrounding the gas passage or opening so that no additional filler material is required to obtain the weld seal. The method and apparatus may also be used to weld seal low or non-pressurized vessels as well as vacuum vessels.