Hybrid inflator improved in mountability to a module

A method of manufacturing a hybrid inflator for an inflation type safety system for a motor vehicle equipped with an airbag, comprising:

• providing an inflator housing adapted to contain pressurized gas therein and having an opening at one end portion thereof;
• providing a gas generator housing connected to said inflator housing and provided with at least one gas generator outlet, said gas generator housing adapted to contain a gas generator agent therein;
• and
• providing a boss made of a single piece material and welded to said opening of said inflator housing to hermetically seal said opening;
• providing said boss with a flange portion for mounting said inflator onto an airbag module by engaging the flange portion to the airbag module;
• providing said boss with a first engaging portion formed in said flange portion for preventing a connector cover from rotating with respect to said boss by engaging with the connector cover, said first engaging portion being a recess defined only by three hems formed in the flange portion;
• and
• providing said boss with a second engaging portion, provided independently from said first engaging portion, formed in said flange portion for preventing the connector cover from detaching from said boss by engaging with the connector cover.

A hybrid inflator for an inflation type safety system for a motor vehicle equipped with an airbag, comprising:

• an inflator housing adapted to contain pressurized gas therein and having an opening at one end portion thereof;
• a gas generator housing connected to said inflator housing and provided with at least one gas generator outlet, said gas generator housing adapted to contain, therein, a gas generator agent ignited by an initiator;
• a boss made of a single piece material and welded to the opening of said inflator housing to hermetically seal said opening, said boss having an initiator adapter portion for receiving the initiator therein;
• and
• a connector cover adapted to be attached to the flange portion of said boss to cover an entire portion of a connector connected to the initiator,
• wherein said boss includes,
• a flange portion for mounting said inflator housing onto an airbag module by engaging the flange portion to the airbag module,
• a first engaging portion formed in said flange portion for preventing said connector cover from rotating with respect to said boss by engaging with the connector cover, said first engaging portion being a recess defined only by three hems formed in the flange portion, and
• a second engaging portion, provided independently from said first engaging portion, formed in said flange portion for preventing said connector cover from detaching from said boss by engaging with the connector cover.