초록 ▼

A non-hybrid pyrotechnic filterless inflator, i.e., gas generator, for an automotive passive restraint air bag having a generally discoidally-shaped pressure vessel having a diameter that preferably is greater than or about equal to its height formed of a cup-shaped closure cap and a base member and

A non-hybrid pyrotechnic filterless inflator, i.e., gas generator, for an automotive passive restraint air bag having a generally discoidally-shaped pressure vessel having a diameter that preferably is greater than or about equal to its height formed of a cup-shaped closure cap and a base member and having at least one exhaust nozzle for directing gaseous products out of the inflator and into the air bag. The pressure vessel contains two separated and independently initiated initiator assemblies. By initiating either one or both initiator assemblies, the inflator can generate a modulated gas output between a first minimum output level and a second maximum output level in response to passenger and driver conditions.

대표청구항 ▼

1. A dual stage inflator capable of producing a gas output modulated between at least a first output level and a second output level, said dual stage inflator comprising:(a) a single pressure vessel, said pressure vessel comprising at least one exhaust nozzle adapted to permit passage of gases withi

1. A dual stage inflator capable of producing a gas output modulated between at least a first output level and a second output level, said dual stage inflator comprising:(a) a single pressure vessel, said pressure vessel comprising at least one exhaust nozzle adapted to permit passage of gases within said pressure vessel out of said pressure vessel; (b) a first non-pressurizable chamber within said pressure vessel, said first non-pressurizable chamber comprising: (i) a first gas-generant charge present in an amount sufficient to generate the first output level; (ii) a first initiator assembly adjacent said first gas-generant charge and capable of initiating said first charge; (iii) a first gas-generant cup comprising at least one sidewall, and containing the first gas-generant charge; and (iv) a lid positioned across an open top of the first gas-generant cup; and (c) a second non-pressurizable chamber within said pressure vessel, said second non-pressurizable chamber comprising: (i) a second gas-generant charge present in an amount sufficient to combine with the first gas-generant charge to generate the second output level; and (ii) a second initiator assembly adjacent said second gas-generant charge and capable of initiating said second charge independent of said first charge; wherein said second chamber is separated from said first chamber by a one-way seal comprising a second chamber lid, said second chamber lid configured and adapted to inhibit passage of gas from said first chamber to said second chamber prior to initiation of said second gas-generated charge, and, upon combustion of said second gas-generant charge, to at least partially open, thereby forming an opening defined by said second chamber lid and said second chamber to permit passage of gas from said second chamber to said first chamber upon initiation of said second gas-generant charge, and wherein the second chamber is disposed within the at least one sidewall, and the first and second chambers do not add structural support to the pressure vessel.