The present invention provides an igniter assembly in which reliability in operation is enhanced.

An igniter assembly includes an igniter main body, a resin portion enclosing a periphery of the igniter main body, a metallic collar being arranged on a periphery of the resin portion and integrated with the resin portion, a cup-like shaped ignitor housing filled therein with a gas generating agent or a transfer charge. The metallic collar includes a combination of a cylindrical collar and an annular collar, and the cup-like shaped ignitor housing abuts against a portion with a reduced diameter on the side of a first end portion of the cylindrical collar, thereby being fixed from the outside.

The present invention provides a gas generator, including: a housing with a gas discharge port; an igniter assembly and a gas generating agent in the housing; and a metallic cup of constant inner diameter covering the igniter to define a charging chamber. The igniter assembly includes a main body, including an ignition portion and a electro-conductive pin integrated with a metallic collar by a resin. The metallic collar has a fixing portion inserted into a hole in a bottom surface of the housing and a remaining portion projecting inward from the bottom surface of the housing, and a guide portion. An inner circumferential wall surface of the metallic cup and an outer circumferential wall surface of the fixing portion are press-fitted, and an annular gap is formed between the inner circumferential wall of the metallic cup member and an outer circumferential wall surface of the guide portion.

In a gas generator, a closing member includes: a first region exposed to a side of a second combustion chamber in a closed state, a second region in contact with a partition member from a side of the first combustion chamber in the closed state, and an engagement region that engages an engaged member fixed in a housing in the closed state; and the closing member is configured to have one or a plurality of communication holes be in a closed state by the closing member being supported at the partition member in the second region due to combustion pressure of a first gas generating agent and to have the closed state released by at least a part of the closing member, the closing member including a displacement portion that is formed continuously so as to be included at least a part of the first region, being displaced in a direction from the side of the second combustion chamber toward the side of the first combustion chamber by combustion pressure of a second gas generating agent acting on the first region.

A method is provided for destructively processing an airbag inflator having an outer housing, a propellant housed within the outer housing, and a membrane disposed between the propellant and an inner surface of the outer housing. The method includes rupturing the membrane, exposing the propellant to a liquid, and permitting the propellant to mix with the liquid to form a liquid-propellant mixture. The method may further include removing at least a portion of the liquid from the liquid-propellant mixture to produce an at least partially solidified material that includes the propellant.

The present invention provides a gas generator, including: a cylindrical housing attached with an ignition device at one end and a diffuser portion, which has a gas discharge port, at the other end; and a combustion chamber charged with a molded article of a gas generating agent in the remaining space inside the cylindrical housing, the combustion chamber provided with a plurality of grooves serving as a gas discharge path, the plurality of the grooves serving as a gas discharge path being formed plurally and continuously in a longitudinal direction of the cylindrical housing and arranged in a circumferential direction of the cylindrical housing, a size of the grooves in the lateral direction being adjusted to be less than a minimum length of the molded article of the gas generating agent, and combustion gas, which is generated by combustion of the molded article of the gas generating agent at a time of actuation, flowing along the grooves serving as a gas discharge path and being discharged from the gas discharge port of the diffuser portion.

An ejector for ejecting a combustion product including, an igniter including an ignition charge and an ignition portion, a pyrotechnic agent, and a cup made of metal, the cup including a bottom surface and a peripheral wall, the peripheral wall being contiguous with a peripheral edge of the bottom surface and disposed to surround the ignition portion, the cup further including an accommodating space accommodating therein the pyrotechnic agent, the bottom surface of the cup including a through hole being defined by a plurality of through-hole peripheral edges, and the adjacent through-hole peripheral edges being connected together at a predetermined connection point, and the through hole including a narrow part, in which a width of the through hole defined by each of parts of the two through-hole peripheral edges of the plurality of through-hole peripheral edges decreases gradually with an increasing distance from a center of the bottom surface toward the peripheral edge of the bottom surface, and the narrow part being located closer to the peripheral edge of the bottom surface than a non-narrow part, which is defined by each of other parts of the two through-hole peripheral edges, is located.

A dual stage inflator includes a housing defining an internal cavity including a combustion chamber. The combustion chamber includes a first portion having a first gas generant material separated from a second portion having a second gas generant material. A gas generant retaining wall is disposed in the housing. A first stage ignition device is disposed in the first portion of the combustion chamber. A second stage ignition device is disposed in the second portion of the combustion chamber. A lid normally closes the second portion of the combustion chamber and is spaced from the gas generant retaining wall. The lid is moveable to an open position opening the second portion of the internal cavity to release combustion gas and abutting the gas generant retaining wall in response to an increase of pressure within the second portion of the combustion chamber. An outer side of the lid and the adjacent side of the gas generant retaining wall are cooperatively configured to allow a flow of combustion gas between the gas generant retaining wall and the lid when the lid abuts the gas generant retaining wall in the open position.

An igniter assembly includes an igniter, a collar, and a holding part, a cup body having a cylindrical peripheral wall and a lid wall and a closing part defining an accommodating space with the cup body, the peripheral wall is sectioned, in an axial direction, into a contact region in contact with the closing part and a noncontact region not in contact with the closing part, the holding part includes a base part covering the contact region and a surrounding wall formed continuously to the base part and surrounding the noncontact region, and a fragile part is formed in the holding part between a first area including at least a part of the base part and a second area including a tip end of the surrounding wall, and thus the second area deforms radially outward preferentially when a load is applied to the surrounding wall by the igniter activated.

The disclosure relates to a gas generator for a vehicle safety system, comprising a first ignition stage, and a second second ignition stage. The first ignition stage comprises a cup-shaped diffuser with a diffuser base and an adjacent diffuser sidewall (57). The first ignition stage, the diffuser and the second ignition stage are arranged along an axial longitudinal axis of the gas generator and the diffuser is positioned between the first and second ignition stages such that the second ignition stage is fastened on an outer area of the diffuser.

The invention relates to a hybrid gas generator (10) which comprises a compressed gas chamber (20) and an igniting unit (30), wherein the compressed gas chamber (20) is closed by a first igniter-side bursting membrane (21) and a second bursting membrane (22). According to the invention, a first, rapidly burning-off pyrotechnic agent (51) and a second pyrotechnic agent (52) burning off slowly in comparison to the first pyrotechnic agent (51) are located in the hybrid gas generator (10), wherein the second bursting membrane (22) is openable by positive pressure which can be generated in the compressed gas chamber (20) and the first pyrotechnic agent (51) is separated from the second pyrotechnic agent (52) in such a manner that the positive pressure in the compressed gas chamber (20) for opening the second bursting membrane (22) can be generated by the first pyrotechnic agent (51).