CURTAIN AIR BAG DEVICE AND METHOD OF PRODUCING THE SAME
First Claim
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1. An air bag device comprising:
- a gas generator that produces a gas when operated; and
an air bag that is expanded when receiving the gas through a gas inlet opening, the air bag being adapted to be mounted on and along a side portion of a passenger room of a motor vehicle when it is flat,wherein the air bag comprises;
inside and outside base fabrics that are stitched to constitute an outer bag that is flat when receiving no gas, the outer bag being formed with the gas inlet opening; and
inside and outside smaller fabrics that are stitched to constitute an inner bag that is installed in the outer bag keeping a given space therebetween, given portions of the inside and outside smaller fabrics being stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag.
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Abstract
An air bag comprises inside and outside base fabrics that are stitched to constitute an outer bag that is flat when receiving no gas. The outer bag is formed with a gas inlet opening through which an inflation gas is led into the outer bag to expand the same. The air bag further comprises inside and outside smaller fabrics that are stitched to constitute an inner bag that is installed in the outer bag. Given portions of the inside and outside smaller fabrics are stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag.
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Citations
12 Claims
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1. An air bag device comprising:
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a gas generator that produces a gas when operated; and an air bag that is expanded when receiving the gas through a gas inlet opening, the air bag being adapted to be mounted on and along a side portion of a passenger room of a motor vehicle when it is flat, wherein the air bag comprises; inside and outside base fabrics that are stitched to constitute an outer bag that is flat when receiving no gas, the outer bag being formed with the gas inlet opening; and inside and outside smaller fabrics that are stitched to constitute an inner bag that is installed in the outer bag keeping a given space therebetween, given portions of the inside and outside smaller fabrics being stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An air bag device comprising:
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a gas generator that produces a gas when operated; and an air bag that is expanded when receiving the gas through a gas inlet opening, the air bag being adapted to be mounted on and along a side portion of a passage room of a motor vehicle when it is flat, wherein the air bag comprises; inside and outside base fabrics that are stitched to each other to constitute a rectangular outer bag that is flat in shape when receiving gas, the outer bag being formed with the gas inlet opening; inside and outside smaller fabrics that are stitched to each other to constitute a rectangular inner bag that is installed in the outer bag, given portions of the inside and outside smaller fabrics being stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag, the inner bag having front and rear open ends exposed to an interior of the outer bag; a first straight gas passage that is defined between an upper ridge of the inner bag and a ceiling part of the outer bag and extends forward from the gas inlet opening; a second straight gas passage that is defined between a lower edge of the inner bag and a bottom part of the outer bag and spaced from the first straight gas passage by the inner bag; and a plurality of openings formed in the inside and outside smaller fabrics of the inner bag.
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12. A method of producing an air bag of an air bag device, the air bag device including a gas generator that feeds the air bag with a gas to expand the same when operated, the air bag including inside and outside base fabrics that are combined to constitute an outer bag that is flat in shape when receiving no gas, the outer bag being formed with the gas inlet opening;
- and inside and outside smaller fabrics that are combined to constitute an inner bag that is installed in the outer bag keeping a given space therebetween, given portions of the inside and outside smaller fabrics being stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag,
the method comprising; (a) stitching a first base fabric to a first smaller fabric to constitute a first flat unit; (b) stitching a second base fabric to a second smaller fabric to constitute a second flat unit; (c) overlapping the first and second flat units having the first and second smaller fabrics put between the first and second base fabrics; (d) folding overlapped peripheral end portions of the first and second base fabrics back to expose overlapped peripheral end portions of the first and second smaller fabrics; (e) stitching the overlapped peripheral end portions of the first and second smaller fabrics; (f) folding the folded back peripheral end portions of the first and second base fabrics back to original flat positions while concealing the stitched overlapped peripheral end portions of the first and second smaller fabrics; and (g) stitching the overlapped peripheral end portions of the first and second base fabrics thereby to constitute a bag.
- and inside and outside smaller fabrics that are combined to constitute an inner bag that is installed in the outer bag keeping a given space therebetween, given portions of the inside and outside smaller fabrics being stitched to given portions of the inside and outside base fabrics respectively to form a plurality of narrow auxiliary chambers between the inner bag and the outer bag,
Specification