An improved high-pressure gas cylinder is provided, which includes a container and a plug. The container has an air passage which communicates an interior of the container with an exterior of the container. The plug includes a body and a sealing sheet, wherein the body is fixed in the air passage. The body has a hole which communicates with the interior of the container, and the sealing sheet covers the hole. The body and the sealing sheet are integral. Whereby, the plug is able to tightly seal the container to reduce the possibility of wasting gas; additionally, the manufacturing process would be less complicated and efficient with the simplified plug.

An apparatus for inflating an air bag of a protection device. The apparatus includes a canister including a first compartment and a second compartment. The first compartment is adapted to contain a compressed gas. A seal is between the first compartment and the second compartment which is adapted to seal the compressed gas inside the first compartment. The second compartment includes a two-step mechanism configured to break the seal to cause thereby an initial gas flow from the first compartment into the second compartment. The initial gas flow causes a wide opening in place of the seal to be created for rapid gas flow through the second compartment and into the air bag to rapidly expand the air bag.

An apparatus for inflating an air bag of a protection device. The apparatus includes a canister including a first compartment and a second compartment. The first compartment is adapted to contain a compressed gas. A seal is between the first compartment and the second compartment which is adapted to seal the compressed gas inside the first compartment. The second compartment includes a two-step mechanism configured to break the seal to cause thereby an initial gas flow from the first compartment into the second compartment. The initial gas flow causes a wide opening in place of the seal to be created for rapid gas flow through the second compartment and into the air bag to rapidly expand the air bag.

A gas generator includes, an ignition device chamber arranged on a first end of a housing, a diffuser including a gas discharge port and closing a second end of the housing, a gas containing chamber disposed between the diffuser and the ignition device chamber, a first rupturable plate closing the ignition device chamber from the gas containing chamber, and a second rupturable plate closing the gas containing chamber from the diffuser, and a cup-shaped deflector disposed on a side of the second rupturable plate. The cup-shaped deflector includes a gas passage in a peripheral surface and a fragile section on at least one of a bottom surface and the peripheral surface, and is disposed with the bottom surface located on a side of the first rupturable plate, with an opening covering the second rupturable plate, and defines a gap between the peripheral surface and an inner surface of the housing.

A gas generator includes, an ignition device chamber arranged on a first end of a housing, a diffuser including a gas discharge port and closing a second end of the housing, a gas containing chamber disposed between the diffuser and the ignition device chamber, a first rupturable plate closing the ignition device chamber from the gas containing chamber, and a second rupturable plate closing the gas containing chamber from the diffuser, and a cup-shaped deflector disposed on a side of the second rupturable plate. The cup-shaped deflector includes a gas passage in a peripheral surface and a fragile section on at least one of a bottom surface and the peripheral surface, and is disposed with the bottom surface located on a side of the first rupturable plate, with an opening covering the second rupturable plate, and defines a gap between the peripheral surface and an inner surface of the housing.

A pressure vessel formed by either by: a) mating a first end or closure to a second end or closure or b) mating a first end to an intermediate body member and mating the intermediate body member to a second end; the first end comprising a hollowed thin walled dome (14) having an exterior surface (15a) and an interior surface (15b) and the dome terminating in an edge surface (14a), the dome (14) having an axis Y extending through its geometric center of the exterior surface, the dome supporting at least one thin hollow walled projection (16, 18, 20) having an exterior (19a) and interior surface (19b), the at least one projection extending outwardly from the dome outer surface (15a), and terminating in a top surface (16a, 23).

A pressure vessel formed by either by: a) mating a first end or closure to a second end or closure or b) mating a first end to an intermediate body member and mating the intermediate body member to a second end; the first end comprising a hollowed thin walled dome (14) having an exterior surface (15a) and an interior surface (15b) and the dome terminating in an edge surface (14a), the dome (14) having an axis Y extending through its geometric center of the exterior surface, the dome supporting at least one thin hollow walled projection (16, 18, 20) having an exterior (19a) and interior surface (19b), the at least one projection extending outwardly from the dome outer surface (15a), and terminating in a top surface (16a, 23).

Airbag cushion diffusers comprising one or more frangible portions and related airbag cushion assemblies and methods. In some embodiments, an airbag cushion assembly may comprise an airbag cushion having an internal diffuser positioned therein. The internal diffuser may comprise a lower panel that may be sewn or otherwise directly coupled to the airbag cushion and an upper panel coupled to the lower panel about respective entire peripheries of the upper and lower panels so as to define a diffuser chamber between the upper panel and the lower panel. The upper panel may comprise a plurality of openings for delivery of inflation gas therethrough and may comprise one or more openings, slits, and/or weakened regions configured to facilitate tearing in specific locations of the diffuser.

Airbag cushion diffusers comprising one or more frangible portions and related airbag cushion assemblies and methods. In some embodiments, an airbag cushion assembly may comprise an airbag cushion having an internal diffuser positioned therein. The internal diffuser may comprise a lower panel that may be sewn or otherwise directly coupled to the airbag cushion and an upper panel coupled to the lower panel about respective entire peripheries of the upper and lower panels so as to define a diffuser chamber between the upper panel and the lower panel. The upper panel may comprise a plurality of openings for delivery of inflation gas therethrough and may comprise one or more openings, slits, and/or weakened regions configured to facilitate tearing in specific locations of the diffuser.

An inflator-based system provides for the actuation of valves and other devices using automotive air bag inflators, for example. One or more inflators can be connected to a valve body with an adapter such that upon inflator activation, inflator gases can act on a piston or similar device to achieve desired movement or operation of the valve or device. An inflator-based actuator can provide for a single action or multiple actions of a valve or other device. Such a system can provide safer and more reliable alternatives to electro-explosive ordnance devices found in pyrovalves, for example. Other uses for an inflator-based actuation system can include a lanyard pull initiator, a dual cartridge cutter, a bolt cutter, a hot gas generator (HGG) body, and a HGG pressure cartridge, to name a few examples.