Gas generator

• US 20080282927A1
• Filed: 05/01/2008
• Published: 11/20/2008
• Est. Priority Date: 05/16/2007
• 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: Neumayer, Hans-Peter, Schoenhuber, Georg, Fuerstenberger, Franz, Friedrich, Joerg, Schranner, Helmut
• Application Number:
  US12/150,829
• Publication Number:
  US 20080282927A1
• Time in Patent Office: Days
• US Class Current: 102/530
• CPC Class Codes: B60R 21/33 Arrangements for non-electric triggering of inflation electrical circuits for triggering safety arrangements B60R21/01

Abstract

A gas generator has a propellant charge and an early ignition device held loosely in the propellant charge. The early ignition device consists of an early ignition charge and an enclosure surrounding the early ignition charge. The enclosure is at least one foil wrapped around the early ignition charge. The outer edges of the foil, lying one over another, are connected with each other to close the enclosure.

Claims

1. A gas generator with a propellant charge (16) and with an early ignition device (20-20d) held loosely in the propellant charge (16), the early ignition device (20-20d) consisting of an early ignition charge (24) and an enclosure (22) surrounding the early ignition charge (24).

2. The gas generator according to claim 1, wherein the enclosure (22) consists of a material which is chemically inert with respect to the material of the propellant charge (16).

3. An early ignition device for a gas generator, wherein the early ignition device (20-20d) consists of an early ignition charge (24) and an enclosure (22) surrounding the early ignition charge (24), in which the enclosure (22) is at least one foil wrapped around the early ignition charge (24), the outer edges (26) of which foil, lying one over another, are connected with each other to close the enclosure (22).

4. The early ignition device according to claim 3, wherein the enclosure (22) is closed by a weld seam at least at one end.

5. The early ignition device according to claim 3, wherein the enclosure (22) is closed by beading, folding or crimping at at least one end.

6. The early ignition device according to claim 3, wherein the enclosure (22) consists of a metal foil.

7. The early ignition device according to claim 3, wherein the enclosure (22) consists of a plastic.

8. The early ignition device according to claim 3, wherein the enclosure (22) consists of a laminate foil.

9. The early ignition device according to claim 3, wherein the early ignition charge (24) contains a portion of an early ignition propellant (32) and a portion of an ignition propellant (34).

10. The early ignition device according to claim 9, wherein the early ignition charge (24) contains at least one tablet of the early ignition propellant (32) and at least one tablet of the ignition propellant (34).

11. The early ignition device according to claim 9, wherein the early ignition charge (24) is formed by a granulate mixture of the early ignition propellant (32) and the ignition propellant (34).

12. The early ignition device according to claim 9, wherein the early ignition charge (24) is compressed to a single tablet.