Arrangement for fastening a gas generator

Details Arrangement for fastening a gas generator Arrangement for fastening a gas generator

1999-07-09

2001-02-27

English, Peter C. (Department: 3619)

Land vehicles

Wheeled

Attachment

C280S740000

Reexamination Certificate

active

06193270

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to an arrangement for fixing a gas generator in a housing, more particularly for fixing a tubular gas generator in a diffuser of an airbag module.
BACKGROUND OF THE INVENTION
It is known to arrange a gas generator, more particularly a tubular gas generator, inside a housing, more particularly in a diffuser which has an opening for inserting the gas generator. The diffuser encloses the gas generator on all sides and has a larger diameter than the gas generator (EP A O 631 908 A1).
It is further known to connect the gas generator by its end faces to the diffuser. Owing to the larger diameter of the diffuser at its opening, an adapter compensates for the differences in the diameters of the diffuser and the gas generator. After sliding the generator into the diffuser, the generator adjoins the adapter and is screwed on the opposite side to the diffuser so that it is tensioned against the adapter.
It is known to use sheet steel parts as the adapter. The drawback with the sheet steel parts is that they are expensive and heavy and they can only be fitted on the diffuser by means of a device. This has a negative effect on the manufacturing sequence and incurs additional assembly costs.
The object of the invention is to allow the assembly of a gas generator, more particularly a tubular gas generator in a housing, more particularly in a diffuser by using an adapter in a cost-effective manner without adversely affecting the manufacturing sequence.
SUMMARY OF THE INVENTION
An arrangement for fixing a gas generator in a housing, more particularly for fixing a tubular gas generator in a diffuser of an airbag module includes a housing that has an open end for inserting the gas generator and the generator adjoins this end of the housing with the interposition of an adapter, preferably a plastic adaptor having openings. At the opposite end of the housing, the generator is screwed into the housing. The housing directly adjoins the gas generator in the active direction of the fastening screw through the openings in the adapter and/or at a point adjacent to the adapter. The housing preferably has at least one web which runs through the adapter or runs next to the adapter to adjoin an end side of the gas generator.
This arrangement has the advantage that the gas generator is tensioned directly with the housing as the generator is screwed into the housing. The plastic adapter lies between the housing and the gas generator and is only stressed axially with a slight force. As a result of this reduced strain any settling of the plastic adapter is eliminated. The sealing action also remains, even in the event of thermal action. Compared to a sheet metal design, the plastic adapter is cheaper and lighter. A further advantage is that the adapter can be fitted by hand onto the diffuser which has considerable advantages with regard to the assembly time. Additional devices can thereby be avoided.
The web preferably adjoins an end face of a generator flange and it is further expedient if two webs are provided.


REFERENCES:
patent: 4191392 (1980-03-01), Barnett
patent: 5257815 (1993-11-01), Bachelder et al.
patent: 5328203 (1994-07-01), Baba et al.
patent: 5458363 (1995-10-01), Garner et al.
patent: 5490690 (1996-02-01), Mihm
patent: 5533750 (1996-07-01), Karlow et al.
patent: 5704634 (1998-01-01), Wallner et al.
patent: 43 10 173 A1 (1993-10-01), None
patent: 42 93 648 T1 (1995-04-01), None
patent: 196 22 319 A1 (1996-12-01), None
patent: 0 631 908 A1 (1995-01-01), None
patent: 0 686 532 A1 (1995-12-01), None
patent: 08040166 (1996-02-01), None
patent: 08080798 (1996-03-01), None
patent: 8-318803 (1996-12-01), None

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