Air bag
First Claim
1. An uncoated hollow weave air bag comprising a hollow weave fabric which is composed of two layers of cloths enclosing the hollow of the air bag,the two layers of cloths being joined together around the circumference of the hollow by a one layer bind weave band;
- one of the cloths confines said hollow on the side of the air bag which faces the vehicle occupant;
the remaining other cloth confines said hollow on the bottom side of the air bag; and
the cloth confining the hollow on the vehicle occupant side of the air bag and said remaining other cloth confining the hollow on the bottom side of the air bag satisfy the relationships as represented below;
1! the cloth confining the hollow on the vehicle occupant side of the air bag is a plain wave cloth having a cover factor (K) as defined by the following formula,
space="preserve" listing-type="equation">2000≦
K≦
2,300 wherein K=Kt+KwKt=warp yarn (ends/inch)×
√
denier of a warp yarnKw=weft yarn (picks/inch)×
√
denier of a weft yarn 2! a gas permeabilities (qA) and (qB) at 19.6 kPa of said cloth confining the hollow on the vehicle occupant side and said remaining other cloth confining said hollow on the bottom side of the air bag have the relation defined below;
qA≦
qBwherein qB is the gas permeability of said remaining other cloth confining the hollow on the bottom side of the air bag excluding the gas permeability of a vent hole portion provided in part in said remaining other cloth on the bottom side of the air bag.
2 Assignments
0 Petitions
Accused Products
Abstract
An uncoated hollow weave air bag composed of a hollow weave fabric in which the circumferential periphery of the hollow part shaping the bag body is joined by a band of one layer bind weave, the hollow weave air bag satisfying the condition 1! - 3! below: 1! the weave constituting cloth A forming the hollow part of the bag body is a plain weave and the cover factor of cloth A being 2000≦K≦2300, 2! the weave constituting cloth B which is the other cloth forming said hollow part, and the ratio of gas permeability at a pressure of 19.6 kpa for cloth B (qB) to that of cloth A (qA), qB/qA satisfies a relation 1≦qB/qA≦2.2, 5! an opening (6) for attachment of the gas generator is provided in part of cloth B. The air bag of the present invention can be produced in a simplified manufacturing process and is light weight, less bulky and excellent in its safe inflation characteristics.
59 Citations
18 Claims
-
1. An uncoated hollow weave air bag comprising a hollow weave fabric which is composed of two layers of cloths enclosing the hollow of the air bag,
the two layers of cloths being joined together around the circumference of the hollow by a one layer bind weave band; -
one of the cloths confines said hollow on the side of the air bag which faces the vehicle occupant; the remaining other cloth confines said hollow on the bottom side of the air bag; and the cloth confining the hollow on the vehicle occupant side of the air bag and said remaining other cloth confining the hollow on the bottom side of the air bag satisfy the relationships as represented below; 1! the cloth confining the hollow on the vehicle occupant side of the air bag is a plain wave cloth having a cover factor (K) as defined by the following formula,
space="preserve" listing-type="equation">2000≦
K≦
2,300wherein K=Kt+Kw Kt=warp yarn (ends/inch)×
√
denier of a warp yarnKw=weft yarn (picks/inch)×
√
denier of a weft yarn2! a gas permeabilities (qA) and (qB) at 19.6 kPa of said cloth confining the hollow on the vehicle occupant side and said remaining other cloth confining said hollow on the bottom side of the air bag have the relation defined below; qA≦
qBwherein qB is the gas permeability of said remaining other cloth confining the hollow on the bottom side of the air bag excluding the gas permeability of a vent hole portion provided in part in said remaining other cloth on the bottom side of the air bag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17)
-
-
16. A base fabric for making an air bag which is composed of two layers of cloth in composite joined together around the circumference of a hollow by a one layer bind weave band, one of said layer of cloths being a plain wave fabric having a gas permeability at 19.6 kPa of not greater than 100 cc/cm2 /sec and having a cover factor(K) of 2000≦
- K≦
2,300 as defined by formula 1!, and the remaining other layer of the cloths having a gas permeability at 19.6 kPa of greater than 100 cc/cm2 /sec;
space="preserve" listing-type="equation">K=Kt+Kw 1!and in the formula; Kt=warp yarn (ends/inch)×
√
denier of a warp yarnKw=weft yarn (picks/inch)×
√
denier of a weft yarn. - View Dependent Claims (18)
- K≦
Specification