Air bag gas generator casing

• US 3,912,458 A
• Filed: 12/17/1973
• Issued: 10/14/1975
• Est. Priority Date: 12/26/1972
• Status: Expired due to Term

• Current Assignee: Daizo Fukuma, Kensho Shirota
• Original Assignee: Daizo Fukuma, Kensho Shirota
• Inventors: Fukuma, Daizo, Shirota, Kensho
• Primary Examiner(s): Wolk, Morris O.
• Assistant Examiner(s): Phillips, Roger F.
• Application Number:
  US05/425,533
• Time in Patent Office: 666 Days
• Field of Search: 23/281 141/4,67 9/11A,321 280/15AB 55/267,523,517 210/496 102/39
• US Class Current: 422/164
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: F42B 3/04 for producing gas under pressure generators of inflation fluid especially adapted for vehicle air bags B60R21/26

Abstract

A rigid, porous element is disposed between inner and outer perforated cylindrical walls to cool and filter gas generated by a gas generating element located within the inner wall.

Claims

1. IN A GAS GENERATOR CASING FOR AN AIR BAG SAFETY DEVICE OF A VEHICLE, COMPRISING A GENERALLY CYLINDRICAL INNER WALL MEMBER HAVING A PLURALITY OF HOLES FORMED THERETHROUGH, A GENERALLY CYLINDRICAL OUTER WALL MEMBER COAXIALLY DISPOSED ABOUT SAID INNER WALL MEMBER AND HAVING A PLURALITY OF HOLES FORMED THERETHROUGH, SAID INNER AND OUTER WALLS BEGIN COMMONLY SEALED AT BOTH ENDS, A GENERALLY RIGID POROUS MEMBER MADE OF AN UNGLAZED SUBSTANCE DISPOSED BETWEEN SAID INNER AND OUTER WALL MEMBERS TO COOL AND FILTER GAS PASSING THERETHROUGH GENERATED BY GAS GENERATING ELEMENT DISPOSED WITHIN SAID INNER WALL MEMBER.

2. In a gas generator casing according to claim 1, wherein said rigid porous member is made from a metal oxide selected from the group consisting of silicon dioxide, aluminum oxide, magnesium oxide, and iron oxide.

3. In a gas generator casing according to claim 1, wherein said rigid porous member is made from a silicate mineral.

4. In a gas generator casing according to claim 3, wherein said silicate mineral is feldspar.

5. A gas generator casing for an air bag safety device of a vehicle, comprising a generally cylindrical inner wall member having a plurality of holes formed therethrough, a generally cylindrical outer wall member coaxially disposed about said inner wall member and having a plurality of holes formed therethrough, said inner and outer wall members being commonly sealed at both ends, a generally rigid porous member made of an unglazed substance and disposed between said inner and outer wall members to cool and filter gas passing therethrough generated by a gas generating element disposed within said inner wall member, a first porous generally cylindrical intermediate member disposed between said porous member and said outer wall member, and a second porous generally cylindrical intermediate member disposed between said porous member and said inner wall member.

6. A gas generator casing according to claim 5, wherein said first and second porous generally cylindrical intermediate members are formed of wire mesh.

7. A gas generator casing according to claim 5, wherein said first and second porous generally cylindrical intermediate members are formed of glass wool.

8. A gas generator casing according to claim 5, wherein one of said first and second porous generally cylindrical intermediate members is formed is formed of wire mesh, and The other one is formed of glass wool.