Daicel Corporation

Daicel Chemical Industries, Ltd.

Toyota Jidosha Kabushiki Kaisha

Toyoda Gosei Co., Ltd.

Tomoharu Kobayashi

Masayuki Yamazaki

Kenji Fukumoto

Naoki Matsuda

Osamu Fukawatase

Shinichiro Ukita

Toru Ozaki

Yuki Fukui

Tadashi Yamada

Mikio Yabuta

Takaki Fukuyama

Yuki Nonoyama

Yasushi Itou

Tomoko Kurata

Hiroki Murase

Teppei Hanano

Kenji Numoto

Masakazu Tokuda

Yusuke Komine

Katsuya Habu

The present invention provides a gas generator including:

Gas generator

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.

Provided is a gas generator including in a housing having a top plate, a bottom plate and a circumferential wall provided with a gas discharge port; a first combustion chamber arranged on the side of the top plate; a second combustion chamber arranged on the side of the bottom plate; a plenum chamber facing the gas discharge port and arranged between the first combustion chamber and the second combustion chamber; a first igniter for igniting and burning a first gas generating agent in the first combustion chamber; and a second igniter for igniting and burning a second gas generating agent in the second combustion chamber.

The present invention provides a gas generator, including:

The present invention provides a gas generator, including: a cylindrical housing; an ignition device installed at a first end of the cylindrical housing, and a diffuser portion installed at a second end thereof; a flow channel forming member disposed inside the cylindrical housing and including a partition wall which separates a first chamber from a second chamber; a combustion chamber formed in the first chamber; a discharge passage formed in the second chamber; a first cylindrical space formed on the outside of the first circumferential wall and a first communication hole formed in the first circumferential wall; a second cylindrical space formed on the outside of the second circumferential wall and being in communication with the first cylindrical space, and a second communication hole formed in the second circumferential wall; a cylindrical filter disposed in the second cylindrical space; an outer diameter (d) of the first circumferential wall, an outer diameter (d) of the second circumferential wall and an outer diameter (d) of the cylindrical filter satisfying relationships of d&#x3e;dand d&#x2265;d; and between the cylindrical filter and the inner wall surface of the cylindrical housing, the second cylindrical space facing the second communication hole via the cylindrical filter.

The present invention provides a gas generator including, in a cylindrical housing, a combustion chamber which is filled with gas generating agents as a gas source, and a gas discharge port for discharging a gas generated by combustion of the gas generating agents,

The present invention provides a gas generator, including; a combustion chamber accommodating an igniter and a gas generating agent; a pressurized gas chamber filled with a gas selected from a rare gas or a nitrogen gas; a diffuser chamber located between the combustion chamber and the pressurized gas chamber and provided with a gas discharge port;

A support structure of a closing member for a gas generator including a cylindrical housing accommodating an ignition device and an inflating gas source chamber is provided. The support structure includes a combination of a closing member closing a gas discharge path and a support member supporting the closing member and is arranged inside the cylindrical housing. The support member includes a base and a convex first support part extending in one direction from a center portion of the base, and a gas passage hole in at least one of the base and the convex first support part. The closing member, having a plate shape with first and second surfaces, is supported from one surface by a distal end surface of the convex first support part abutting against a center portion of the first or second surfaces, and has an annular surface not abutted by the convex first support part.

Support structure of closing member for gas generator and gas generator using same

The present invention provides a gas generator, including

The present invention provides a gas generator including an ignition device chamber provided with the ignition device, a gas inflow chamber provided with a gas discharge port, and a pressurized gas chamber being arranged in order from the first end; a closing member including a fixing portion and a rupturable plate fixed to the fixing portion and closing between the pressurized gas chamber and the gas inflow chamber; and a breaking device for the rupturable plate being arranged between the ignition device chamber and the gas inflow chamber, the breaking device including a base portion, which has an outer circumferential surface abutted against an inner circumferential wall surface of the cylindrical housing, and a rod extending from the base portion to the rupturable plate, the fixing portion of the closing member including an annular plate surface portion, extending radially inward from the inner circumferential wall surface of the cylindrical housing, and a cylindrical wall portion extending from an inner circumference of the annular plate surface portion towards the gas inflow chamber, the rupturable plate of the closing member being fixed by welding to the annular plate surface portion of the fixing portion from the pressurized gas chamber, the breaking device being disposed such that a tip end of the rod is enclosed by the cylindrical wall portion of the fixing portion of the closing member.

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.

An inflator includes a rupturable plate in a circular shape for closing an opening of a pressurized gas-filled space. The rupturable plate has a fragile portion formed by grooves in a regular polygon on one surface, including first fragile portions formed by grooves forming a circumference of the regular polygon, and second fragile portions formed by grooves extending from all apexes of the regular polygon to a center thereof creating a plurality of triangles formed by the first fragile portions as a base and the second fragile portions as the remaining two sides. The depth (h1) of the first fragile portion is less than the depth (h2) of the second fragile portion whereby, when pressure is exerted on a rear surface opposite to the fragile portions, the second fragile portions will rupture as the first fragile portions bend.

Rupturable plate and inflator using same

The present invention provides a gas generator in which an outer container is formed by a pressurized gas bottle and a gas generation chamber housing, and a closing member closes therebetween, a gas inflow chamber formed with a gas discharge port is provided between a gas generation chamber and a pressurized gas chamber, a partition wall provided with a rupturing member separates the gas inflow chamber from the gas generation chamber.

The present invention provides an inflator including

Growing community of inventors

Tatsuno, Japan

Tomoharu Kobayashi