Daicel Chemical Industries, Ltd.

Diacel Chemical Industries, Ltd.

Nobuyuki Ohji

Nobuyuki Katsuda

Naoki Matsuda

Yoshihiro Nakashima

Yasunori Iwai

Masayuki Nakayasu

Mikio Yabuta

Shogo Tomiyama

Katsuhito Miyaji

Takashi Okuyama

Atsushi Hatomoto

Kenji Kitayama

Toshiro Iwakiri

Yoshihiro Nakshima

Shoji Kobayashi

The present invention relates to a gas generating composition including a fuel, an oxidizing agent, a binder and an additive, the additive being one or two or more selected from complex basic carbonates represented by Formula (I) or (II) below;MMCO(OH)&#x2003;&#x2003;(I)MMCO(OH)&#x2003;&#x2003;(II)(In Formula (I), Mstands for H, Li, Na, K, or NH; Mstands for Al, Fe, Cr, Co, In, Bi, Sb, B, Sc, or Ga;in Formula (II), Mand Mare mutually different, each standing for Cu, Zn, Co, Ni, Mg, Mn, Fe, or Be).

Gas generating composition

The present invention relates to a molding die for molding a hollow molding article, including:

Molding die

Inflator

When a gas generating agentinside a first combustion chamberis burnt, a gas generating agentis prevented from being burnt by function of a metal thin plateclosing a communication holewith a second combustion chamber. A cuphaving a holeis covered on an igniter, and the flame thereof advances into a transfer chargestraightly in a narrow width. Accordingly, since the transfer chargeis burnt completely, sufficient flame for burning a gas generating agentcan be generated securely. A communication holebetween a first combustion chamberand a second combustion chamberis closed by double-layered seal tapelaminated through an adhesive layer. After activation, the seal tapesare not ruptured due to increase in the internal pressure of the first combustion chamber, but they are peeled off easily due to increase in the internal pressure of the second combustion chamber

Gas generator for air bag and air bag apparatus

A gas generator has an inner cylindrical member disposed in a cylindrical housing, an annular first combustion chamber provided radially in the outside of the inner cylindrical member, and, in the combustion chamber, a ratio of its radial average distance to its axial average length is adjusted to be in the range of 0.2 to 2.0. The gas generator has a retainer which changes a flow of a gas ejected from a through-hole in the inner cylindrical member and has a cylindrical portion for collecting fluid and semifluid combustion products included in the gas.

Gas generator for air bag and air bag device

A gas generator for an air bag is provided with a porous tube member, in which a portion opposing the ejecting direction of a flame and the like generated due to an activation of an ignition unit stored in an inner cylindrical member is formed as a flame-preventing annular portion having no opening, disposed in a gas generator housing. Further, a multistage gas generating apparatus prevents an erroneous connection between a plurality of igniters stored in a gas generator and outputting portions of an ignition signal outputting device. In the multistage air bag apparatus, the gas generator includes a plurality of igniters, and a defining unit for specifying the unique connection between the respective ignition signal outputting unit and the respective igniters is provided in a connector provided in a lead wire for sending an ignition signal to each of the igniters.

A gas generator for an air bag has gas discharge ports closed by a seal tape and has two different opening areas. When a pressure inside the gas generator increases due to combustion of a gas generating agent, a gas discharge port having a larger area is first opened to decrease the internal pressure. Subsequently, as the pressure further increases a gas discharging port having a smaller area is opened to decrease the internal pressure.

Gas generator for air bag

A gas generator for an air bag is provided with a porous tube member, in which a portion opposing the ejecting direction of a flame and the like generated due to an activation of an ignition unit stored in an inner cylindrical member is formed as a flame-preventing annular portion having no opening, disposed in a gas generator housing. Further, a multistage type gas generating apparatus prevents an erroneous connection between a plurality of igniter stored in a gas generatorand outputting portions of an ignition signal outputting device. In the multistage type air bag apparatus, the gas generator includes a plurality of igniters, and a defining unit for specifying the unique connection between the respective ignition signal outputting unit and the respective igniters is provided in a connector provided in a lead wire for sending an ignition signal to each of the igniters.

There is provided a multistage gas generator for an air bag in which the entire size of a container is suppressed, a volume ratio of each combustion chamber can arbitrarily be adjusted. Ignition means are respectively disposed in the combustion chambers and provided in a housing At least one of the combustion chambers is provided inside an inner shell disposed eccentrically with respect to the center axis of the housing The respective ignition means are disposed eccentrically with respect to the center axis of the housing Further, a communication hole which allows mutual communication between the combustion chambers is provided. An automatic ignition material (AIM) which is to be ignited and burnt by a transmitted heat is provided in either one of the combustion chambers. One or both of axial end surfaces of a cylindrical filter means are formed as inclining end surfaces which get narrower in the axial extending direction. A supporting member for supporting the inclining end surfaces of the filter means which is expanded radially by passage of an activation gas is provided in the housing.

Gas generator for multi-stage air bag and air bag device

A multistage gas generator for an air bag has ignition devices and respectively disposed in the combustion chambers and provided in a housing . A lead wire for sending an ignition signal to each igniter is provided with a connector . The connector is provided with a defining element for specifying unique combination of connection between the respective ignition signal-outputting unit and the respective igniters

Multistage gas generator for air bag and air bag apparatus

A gas generator small in size and which can be produced easily with a simple structure is provided. The output of a gas generator is equalized so that an occupant can be safely restrained, and the combustion performance can be stably adjusted. The gas generator comprises a housing forming an outer shell container and accommodating two or more ignition units to ignite upon an impact and two or more gas generating agents which are independently ignited and burnt by the ignition units to generate a combustion gas for inflating an air bag, and a plurality of gas discharge ports which are formed in the housing, wherein the gas discharge ports are closed by sealing units for maintaining an internal pressure of the housing to the given pressure, a breaking pressure for breaking the sealing units is adjusted in multiple stages by controlling gas discharge ports and/or sealing units, and a difference of the maximum internal pressures in the housing at activation of the respective igniters is suppressed.

A gas generator for an air bag system has, in a housing provided with a gas discharge port, ignition means activated upon an impact, and gas generating means ignited and burnt by the ignition means and generate a combustion gas for inflating an air bag, and two combustion chambers storing the gas generating means. The combustion chambers are concentrically provided so as to be adjacent to each other in the radial direction of the housing, and a communicating hole which allows communication between the combustion chambers is provided, in the housing. The gas generator also has two igniters, two different gas generating means, a connector having a lead wire, a combustion chamber, ignition means provided in an inner cylindrical member, and an automatic ignition member, which can effectively restrain an occupant.

Air bag gas generator and air bag apparatus

Air bag gas generator and air bag device

A gas generator for an air bag includes: a housing having top and bottom plates and a cylindrical wall provided between those plates; a cylindrical filter unit, provided inside the housing, at least one end of the filter unit having an inclining end surface such that the length of the filter unit in an axial direction thereof decreases as the distance from a central axis of the filter in a radial direction increases, an outer peripheral surface of the filter unit and an inner surface of the cylindrical wall defining a plenum; and a supporting portion formed inside the housing and having an inclining surface substantially parallel to the inclining end surface of the filter unit. The supporting portion engages with the inclining end surface such that the plenum is maintained even when the filter unit is urged to expand in the radial direction by the combustion gas.

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Himeji, Japan

Nobuyuki Ohji