Gas generator

• US 20080022880A1
• Filed: 07/30/2007
• Published: 01/31/2008
• Est. Priority Date: 07/31/2006
• Status: Abandoned Application

• Current Assignee: TRW Airbag Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Airbag Systems GmbH (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Spitzenberger, Dieter, Neumayer, Hans-Peter, Bierwirth, Sebastian
• Application Number:
  US11/881,922
• Publication Number:
  US 20080022880A1
• Time in Patent Office: Days
• US Class Current: 102/530
• CPC Class Codes: B60R 2021/26029 Ignitors
• CPC Class Codes: B60R 2021/26076 characterised by casing
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder

Abstract

A gas generator, especially for a vehicle safety system, has a pyrotechnical igniter unit (22) and a holder (14) for the igniter unit (22). The igniter unit (22) is attached to the holder (14) in that the igniter unit (22) and the holder (14) are encapsulated together by one of injection molding and foaming of a plastic. The holder (14) has at least one passage opening (30, 38) for the plastic during the encapsulation by one of injection molding and foaming, the at least one opening being configured in such a way as to create a form-fitting anti-twist protection between the plastic (34) and the holder (14).

Claims

1. A gas generator, especially for a vehicle safety system, having

a pyrotechnical igniter unit (22) and

a holder (14) for said igniter unit (22),

said igniter unit (22) being attached to said holder (14) in that said igniter unit (22) and said holder (14) are encapsulated together by one of injection molding and foaming of a plastic,

said holder (14) having at least one passage opening (30, 38) for said plastic during said encapsulation by one of injection molding and foaming, said at least one opening being configured in such a way as to create a form-fitting anti-twist protection between said plastic (34) and said holder (14).

2. The gas generator according to claim 1, wherein said passage opening (30) is out-of-round.

3. The gas generator according to claim 1, wherein said passage opening (30) has a notch (32) protruding laterally outwards.

4. The gas generator according to claim 1, wherein several passage openings (30, 38) are provided.

5. The gas generator according to claim 1, wherein a central passage opening (30) is provided.

6. The gas generator according to claim 1, wherein said holder (14) is a section of an outer housing (10) of said gas generator.

7. The gas generator according to claim 1, wherein igniter contacts (24) of said igniter unit (22) protrude through said holder (14).

8. The gas generator according to claim 7, wherein said igniter contacts (24) are part of said igniter unit (22) and form a prefabricated unit together with said igniter unit (22).