Gas generator

• US 20050052006A1
• Filed: 02/21/2003
• Published: 03/10/2005
• Est. Priority Date: 02/22/2002
• Status: Active Grant

• Current Assignee: Nippon Kayaku Company Limited
• Original Assignee: Nippon Kayaku Company Limited
• Inventors: Tanaka, Koji, Nishimura, Tsuyokazu
• Granted Patent: US 7,404,573 B2
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/2633 with a plurality of inflation levels
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/261 with means other than bag structure to diffuse or guide inflation fluid
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder

Abstract

A gas generator comprises: a cylindrical housing (3) comprising an initiator shell (1) provided with a plurality of igniter devices (16, 17) and a closure shell (2); a combustion chamber formed in said housing (3) and loaded with gas generants (14a, 14b); a cylindrical member that partitions said combustion chamber into two or more combustion chambers (4, 7); and filter elements (6, 8) provided in the respective combustion chambers (4, 7) of the partitioned chamber wherein at least one of said filter elements (6, 8) is disk-shaped, and said respective combustion chambers (4, 7) are independent from each other.

Claims

1. A gas generator comprising:

a cylindrical housing (3) having an initiator shell (1) provided with a plurality of igniter devices (16, 17) and a closure shell (2);

a combustion chamber formed in said housing (3) and loaded with gas generants (14a, 14b);

a cylindrical member (5) that partitions said combustion chamber into two or more combustion chambers (4, 7); and

filter elements (6, 8) provided in the respective combustion chambers (4, 7) as formed by partitioning into two or more,

wherein at least one of said filter elements (6, 8) is disk-shaped, and said respective combustion chambers (4, 7) are independent from each other.

2. The gas generator as claimed in claim 1 wherein, at least one of said combustion chambers (4, 7) is restricted in the axial direction of the gas generator by a partition member (39).

3. The gas generator as claimed in claim 1 wherein an orifice plate (32) having a plurality of orifices (33) is provided in said cylindrical member (5).

4. The gas generator as claimed in claim 1 wherein, in at least one of said combustion chambers (4, 7) is restricted in the axial direction of the gas generator by a partition member (39), and an orifice plate (32) having a plurality of orifices (33) is provided in said cylindrical member (5).

5. The gas generator as claimed in claim 1 wherein a plurality of orifices (33) are integrally formed with the base portion (30) of said cylindrical member (5).

6. The gas generator as claimed in claim 1 wherein, at least one of said combustion chambers (4, 7) is restricted in the axial direction of the gas generator by a partition member (39), and a plurality of orifices (33) are integrally formed with the base portion (30) of said cylindrical member (5).

7. The gas generator as claimed in claim 2 wherein said partition member (39) is formed as a corrugated plate in order to avoid deformation and secure a flow path of the gas generated in said cylindrical member (5).

8. The gas generator as claimed in claim 4 wherein said partition member (39) is formed as a corrugated plate in order to avoid deformation and secure a flow path of the gas generated in said cylindrical member (5).

9. The gas generator as claimed in claim 6 wherein said partition member (39) is formed as a corrugated plate in order to avoid deformation and secure a flow path of the gas generated in said cylindrical member (5).