Air-bag arrangement
First Claim
1. An air-bag arrangement for use in a motor vehicle, the air-bag arrangement comprising:
- a gas generator, means to activate the gas generator in response to an accident occurring, and an air-bag to receive gas from the gas generator, the air-bag comprising three super-imposed fabric layers with outer peripheries conjoined, the three fabric layers including a lower layer, an intermediate layer, and an upper layer, a substantially centrally located aperture provided in the lower layer to receive a gas outlet of the gas generator, a plurality of apertures formed in the intermediate layer, and means interconnecting regions of the intermediate layer adjacent each of said plurality of apertures to the lower layer, wherein said interconnecting means partially surrounds each of said plurality of apertures, said interconnecting means being omitted in a region adjacent each of said plurality of apertures which is radially outwardly positioned relative to the center of the intermediate layer, the arrangement being adapted so that on actuation of the gas generator, initially gas is supplied to a region located substantially centrally of the air-bag between the intermediate layer and the lower layer in order to inflate that region, and subsequently is passed to a radially outer substantially annular region located between the intermediate layer and the lower layer to inflate that region and, during final stages of inflation of the bag, gas passes through the each of said plurality of apertures in the intermediate layer to inflate space between the intermediate layer and the upper layer.
1 Assignment
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Accused Products
Abstract
An air-bag arrangement for use in a motor vehicle comprises a gas generator(9) which generates gas when an accident occurs. An air-bag is provided to be inflated by the gas. The air-bag comprises three super-imposed fabric layers(2,3,4), the outer peripheries of which are conjoined by a seam(5). A central aperture(6) in the lower-most layer receives the gas outlet(8) of the gas generator. A plurality of apertures(12) are formed in the intermediate layer and seams(13) interconnect the intermediate layer(3) and the lower-most(2) adjacent the apertures. The seams(13) partially surround each aperture, but are not present in a region(14) which is radially outwardly positioned relative to the center of the intermediate layer(3). This arrangement causes the bag, on inflation, to inflate laterally outwardly before inflating towards the occupant of the vehicle to be protected by the bag.
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Citations
10 Claims
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1. An air-bag arrangement for use in a motor vehicle, the air-bag arrangement comprising:
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a gas generator, means to activate the gas generator in response to an accident occurring, and an air-bag to receive gas from the gas generator, the air-bag comprising three super-imposed fabric layers with outer peripheries conjoined, the three fabric layers including a lower layer, an intermediate layer, and an upper layer, a substantially centrally located aperture provided in the lower layer to receive a gas outlet of the gas generator, a plurality of apertures formed in the intermediate layer, and means interconnecting regions of the intermediate layer adjacent each of said plurality of apertures to the lower layer, wherein said interconnecting means partially surrounds each of said plurality of apertures, said interconnecting means being omitted in a region adjacent each of said plurality of apertures which is radially outwardly positioned relative to the center of the intermediate layer, the arrangement being adapted so that on actuation of the gas generator, initially gas is supplied to a region located substantially centrally of the air-bag between the intermediate layer and the lower layer in order to inflate that region, and subsequently is passed to a radially outer substantially annular region located between the intermediate layer and the lower layer to inflate that region and, during final stages of inflation of the bag, gas passes through the each of said plurality of apertures in the intermediate layer to inflate space between the intermediate layer and the upper layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification