Daicel Corporation

Daicel Chemical Industries, Ltd.

Teppei Hanano

Masayuki Yamazaki

Naoki Matsuda

Shinichiro Ukita

Kenji Fukumoto

Katsuhiro Imoto

Takashi Okuyama

Haruhiko Yamashita

Tomoharu Kobayashi

Kenji Numoto

Shuichi Shonai

The present invention provides a sealing structure of a sealed container in which an opening of a metallic cylindrical container is closed with a metallic closing member, wherein a gap between an inner wall surface on an side of the opening of the metallic cylindrical container and an outer surface of the metallic closing member that radially faces the inner wall surface is sealed with a seal member having been melted and solidified.

Sealing structure of sealed container, formation method therefor, gas generator using sealing structure of sealed container, and manufacturing method therefor

A gas generator including an enhancer chamber provided on a first end of a cylindrical housing and including an igniter therein, a diffuser portion formed with a gas discharge port on a second end, a combustion chamber provided between the diffuser portion and the enhancer chamber, the enhancer chamber being an internal space which is axially sandwiched between the igniter and a cup-shaped partition wall, the internal space accommodating therein an enhancing agent, the cup-shaped partition wall including a peripheral wall provided with a peripheral wall body with a plurality of nozzles and an annular portion expanding outwardly from the peripheral wall body, an outer surface of the annular portion abutting against an inner wall surface of the cylindrical housing, a cylindrical gap being formed between the peripheral wall body and the inner wall surface, the nozzles being disposed to face the cylindrical gap, and the cylindrical gap being devoid of the gas generating agent therein.

Gas generator

The present invention provides a gas generator, including:

The present invention provides a gas generator including a cylindrical housing in which an ignition device is attached at a first end portion thereof and a diffuser portion provided with a gas discharge port is attached at a second end portion thereof, an annular end surface being formed on the side of the second end portion, a cylindrical flow path forming member being disposed in the cylindrical housing, an inner space of the cylindrical flow path forming member being partitioned by a partition wall into a first chamber on the side of the first end portion and a second chamber on the side of the second end portion, a space, which includes the first chamber, being a combustion chamber filled with a gas generating agent, and the second chamber forming part of a gas discharge path, in the cylindrical flow path forming member, a first cylindrical space, which is formed between a first wall surface of the cylindrical flow path forming member on the side of the first chamber and the inner wall surface of the cylindrical housing, and a second cylindrical space, which is formed between a second wall surface of the cylindrical flow path forming member on the side of the second chamber and the inner wall surface of the cylindrical housing, being continuous in an axial direction, and the second cylindrical space being a cylindrical space with a length L from a boundary with the first cylindrical space to the annular end surface, and having an annular pocket portion with a length Lfrom the annular end surface to the second communication holes, and at least part of a surface of the annular pocket portion being provided with a concave-convex portion.

The present invention provides a gas generator wherein a diffuser portion having a gas discharge port is disposed at one end of a cylindrical housing; an ignition device is disposed at the other end of the cylindrical housing; an axially-movable metallic partition wall having a plurality of through-holes is disposed between the ignition device and the diffuser portion; a space between the partition wall and the ignition device is an ignition device chamber charged with a molded article of a first gas generating agent; a space between the partition wall and the diffuser portion is a combustion chamber charged with a molded article of a second gas generating agent; the partition wall has a circular bottom surface and an annular wall extending, in a single direction, perpendicularly to an outer circumference of the circular bottom surface, and the circular bottom surface is disposed so as to be on the diffuser portion side; the ignition device has an igniter having a disk-shaped ignition portion protruding toward the partition wall and a metallic annular member having an annular wall and disposed around the ignition portion; and the annular wall of the annular member protrudes to the partition wall further than the distal end surface of the ignition portion.

The present invention provides a gas generator including, an ignition device chamber, a gas inflow chamber, and a pressurized gas chamber being arranged from a first end fixed with an ignition device to a second end opposite thereto in a cylindrical housing, an inner circumferential wall surface of the cylindrical housing, from the ignition device chamber to the gas inflow chamber, having a first movement restricting portion, a second movement restricting portion and a stopping portion which are arranged in an axial direction at intervals in the above order so as to protrude, the second movement restricting portion having an ignition device chamber-side surface which is an inclined surface decreasing an inner diameter of the housing from the side of the ignition device chamber to the side of the gas inflow chamber and a gas inflow chamber-side surface whose angle (&#x3b1;1) with respect to the cylindrical housing is not more than 90 degrees, so that an axial cross-sectional shape of the second movement restricting portion is a triangle, a breaking device being arranged between the ignition device chamber and the gas inflow chamber and including a base whose outer circumferential surface abuts against an inner circumferential wall surface of the cylindrical housing and a distal end having an enlarged-diameter portion, and before actuation, the base being held between the first movement restricting portion and the second movement restricting portion, after actuation, the base being held between the surface of the second movement restricting portion whose angle &#x3b1;1 is not more than 90 degrees and the stopping portion.

The present invention provides a gas generator including

A gas generator includes a cylindrical housing, a diffuser portion, a first combustion chamber defined by a first porous plate member, a second combustion chamber defined by a second porous plate member, and an ignition device having an ignition portion attached to an igniter collar. The first porous plate member comprises first through holes arranged in the vicinity of a peripheral edge portion. An annular space is formed between an outer peripheral surface of the ignition portion and an inner peripheral wall surface of the cylindrical housing. The height (H) of a top surface of the ignition portion from the igniter collar and a smallest length (Lmin) of a first gas generating agent in the first combustion chamber satisfies a relation Lmin&#x3c;H. An axis of the cylindrical housing is coincident with a central line of the ignition portion, the first porous plate member, and the second porous plate member.

A seal tape, a gas generator for a restraining apparatus using the seal tape, and a method for manufacturing a gas generator are provided. The seal tape closes, from an outside of the gas generator housing, a gas discharge port in a housing. The seal tape includes, a rupture portion for forming a door portion, and including a fragile portion and a rupture blocking portion at a tip of the fragile portion, a fixing support portion remaining attached to the housing, and the door portion bounded by the rupture portion and the fixing support portion being adjusted such that the gas discharge port is entirely open in a case where the door portion is opened.

Seal tape for gas generator

The present invention provides a gas generator including a housing provided with a diffuser shell and a closure shell, an ignition device, the diffuser shell being in a substantially cup-like shape and having an annular bent portion obtained by bending a circumferential wall portion at an opening inwardly, the closure shell being in a substantially annular shape having a annular plate portion that includes a annular curved portion projecting toward the inside of the housing, the ignition device being fixed to a central hole in the annular plate portion with a resin, an inner circumferential part of the annular plate portion in the closure shell abutting against the resin, an outer circumferential part of the annular plate portion abutting against and being fixed to the annular bent portion of the diffuser shell.

A gas generator for a restraining apparatus includes a housing, an inner tube member within the housing, an ignition device on a bottom portion of the housing within the inner tube member, a solid gas generating agent in a combustion chamber, and an adsorbent separated from the solid gas generating agent and stored in a cup-shaped container. The container is provided such that a gap is formed between an opening portion of the container and a ceiling portion of the housing or a member in the housing, and a bottom portion side of the container is inserted such that at least a part of an outer circumferential wall surface of the container directly opposes an inner circumferential wall surface of the inner tube member. At activation, the container is moved by an impact and abuts against the ceiling portion of the housing or the member to close the opening portion.

Gas generator and assembling method of the same

A gas generator includes, a tubular housing, an ignition device attached to one end and a diffuser having a gas discharge port, attached to the other end of the housing, a tubular member, having first and second ends, disposed inside the housing such that the first and second ends are oriented towards the ignition device side and the diffuser side, respectively, and forming a tubular gap leading to the gas discharge port, a combustion chamber provided inside the tubular member, first and second gas passage holes formed on the first and second end sides, respectively, and an opening portion formed between the first and second gas passage holes, such that the gas passage holes and the opening portion communicate the combustion chamber with the tubular gap, and a projecting portion projecting from the opening portion into at least one of the combustion chamber and the tubular gap.

A cylindrical housing is mounted with an igniter and a diffuser portion having a gas discharge port. A cylindrical member is disposed and fixed in the housing so as to form a cylindrical gap reaching the gas discharge port. An obstacle is provided in the gap, and a first gas passage hole, a second gas passage hole and a third gas passage hole are formed. A gas generating agent is ignited and burnt by activation of the igniter to generate gas, part of the generated gas flows into the gap through the first gas passage hole (f), part of the gas that has passed therethrough flows again into the cylindrical member through the second gas passage hole (f) to aid the combustion of the gas generating agent, and then the gas flows into the gap through the third gas passage hole (f) and finally is discharged from the gas discharge port.

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Tatsuno, Japan

Teppei Hanano