Land vehicles – Wheeled – Attachment
Reexamination Certificate
1999-07-22
2001-11-20
Swann, J. J. (Department: 3611)
Land vehicles
Wheeled
Attachment
C280S742000
Reexamination Certificate
active
06318754
ABSTRACT:
The invention relates to an airbag apparatus in accordance with the preamble of claim
1
.
The gas generator housings of known airbag apparatuses consist either of two half shells which surround the gas generator over a certain length, with a radial and areal covering being required, or a single-piece housing with two radial seals at the periphery of the gas generator or with a radial seal and a closed side is provided.
Housings of this kind are very voluminous and heavy so that they can be managed and accommodated only with difficulty in particular for the installation in head airbag apparatuses.
The object of the invention is to provide an airbag apparatus of the initially named kind which has a very low space requirement and no great weight without problems of tightness, mounting or safety arising.
The features of the characterising part of claim
1
are provided for satisfying this object.
In accordance with the invention thus the housing which is connected to the gas generator is distinguished in that, of the generally two openings or groups of openings which are present, in each case only one is associated with a housing which is to be placed on at one side. The sealing surface is located very close to the associated gas outlet opening. Through this the forces which act on the seal are minimised. The other gas outlet opening is preferably closed during the mounting.
Through this a complicated and expensive housing is dispensed with which collects the gas of all openings and then conducts it into gas conduction line, which is preferably designed as a hollow tube. It is however also conceivable that two housings in accordance with the invention are placed at the two diametrically oppositely disposed openings for the parallel feeding of two gas bags.
Because in accordance with the invention only one opening is available in a housing for the gas outflow instead of two openings, the bores must be so large that the remaining bore(s) have the size required for the function. The size of the bores must be provided in the manufacture of the gas generator.
The gas outlet opening of the gas generator which is to be covered over by a closure means or a further one-sided housing is retained for the purpose of the transport because the gas generators are thereby thrust-neutral until the assembly, i.e. during the entire transport. For this reason the gas outlet opening which is possibly not used in the later operation is only closed after the transport during the installation or shortly prior to the installation into the vehicle.
Advantageous further developments of the invention are characterised by the subordinate claims.
REFERENCES:
patent: 3937488 (1976-02-01), Wilson et al.
patent: 5308108 (1994-05-01), Rion
patent: 5536041 (1996-07-01), Acker et al.
patent: 5775726 (1998-07-01), Timothy et al.
patent: 6070903 (2000-06-01), Beisswenger et al.
patent: 196 29 541 (1998-01-01), None
patent: 297 22 793 (1998-04-01), None
patent: 298 01 104 (1998-07-01), None
Einsiedel Heinrich
Glockler Oliver
Dunn David R.
Foley & Lardner
Swann J. J.
Takata-Petri AG
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