US5073418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low permeability fabric, airbag made of same and method of making same
Assignee: Stern and Stern Industries Inc
•
Filing: 1990-08-09
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Granted: 1991-12-17
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Expires: 2010-08-09
Abstract
Abstract An airbag includes a bag made of a strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm3/sec/cm2) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth. The cloth is calendered on both sides to reduce its permeability. The airbag may additionally include a finish of low thermal conductivity disposed on at least the surface of the cloth forming the interior of the bag.
Inventors
- 👤 Peter B. Thornton
- 👤 Stanley H. Cone
- 👤 George W. Booz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:26
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D03; D03D; D03D1/00; D03D1/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1362; Y10T442/00; Y10T442/30
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
59 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 2
Dependent Claim
59 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 3
Dependent Claim
74 words
The airbag of claim 1 wherein said fabric is further characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than 0.016 inch (0.041 cm).
Claim 4
Dependent Claim
15 words
The airbag of claim 1 wherein said cloth is woven in a 1×1 plain weave.
Claim 5
Dependent Claim
15 words
The airbag of claim 1 wherein said cloth is woven in a 2×2 basket weave.
Claim 6
Dependent Claim
22 words
The airbag of claim 1 wherein said cloth is woven about 51-52 ends/inch by about 43-52 picks/inch (20 ends/cm by 17-20 picks/cm.)
Claim 7
Dependent Claim
10 words
The airbag of claim 1 wherein said cloth is polyester.
Claim 8
Dependent Claim
18 words
The airbag of claim 1 wherein said cloth is woven of not greater than 600 denier multifilament yarn.
Claim 9
Dependent Claim
15 words
The airbag of claim 7 wherein said cloth is woven of 400-600 denier multifilament yarn.
Claim 10
Dependent Claim
15 words
The airbag of claim 8 wherein said cloth is woven from yarn having 100-300 filaments.
Claim 11
Dependent Claim
14 words
The airbag of claim 9 wherein said cloth is woven from polyester filament yarn.
Claim 12
Dependent Claim
17 words
The airbag of claim 1 wherein said cloth is calendered on both sides below its softening temperature.
Claim 13
Dependent Claim
32 words
The airbag of claim 1 additionally including a finish disposed on at least the surface of said cloth forming the interior of said bag to reduce flash point melting of said cloth.
Claim 14
Dependent Claim
13 words
The airbag of claim 12 wherein said finish is of low thermal conductivity.
Claim 15
Dependent Claim
10 words
The airbag of claim 12 wherein said finish includes volatiles.
Claim 16
Dependent Claim
72 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated, woven, high strength, lightweight, thin, flexible cloth calendered on both sides below its softening temperature to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 17
Dependent Claim
72 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated, woven, high strength, lightweight, thin, flexible cloth calendered on both sides below its softening temperature to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 18
Dependent Claim
146 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth of polyester calendered on both sides below its softening temperature to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth, and characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than 0.016 inch (0.041 cm), woven of 400-600 denier multifilament yarn, having 100-300 filaments per yarn bundle.
Claim 19
Dependent Claim
146 words
An airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth of polyester calendered on both sides below its softening temperature to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth, and characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than 0.016 inch (0.041 cm), woven of 400-600 denier multifilament yarn, having 100-300 filaments per yarn bundle.
Claim 20
Dependent Claim
94 words
An airbag comprising a bag of a heat-resistant strong, lightweight, thin, flexible fabric of low permeability formed of (A) an uncoated woven cloth made from yarn and characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth; and (B) a finish disposed on at least the surface of said cloth forming the interior of said bag to reduce flash point melting of said cloth.
Claim 21
Dependent Claim
94 words
An airbag comprising a bag of a heat-resistant strong, lightweight, thin, flexible fabric of low permeability formed of (A) an uncoated woven cloth made from yarn and characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth; and (B) a finish disposed on at least the surface of said cloth forming the interior of said bag to reduce flash point melting of said cloth.
Claim 22
Dependent Claim
13 words
The airbag of claim 17 wherein said finish is of low thermal conductivity.
Claim 23
Dependent Claim
10 words
The airbag of claim 17 wherein said finish includes volatiles.
Claim 24
Dependent Claim
18 words
The airbag of claim 17 wherein said finish is an additive added to said cloth after weaving thereof.
Claim 25
Dependent Claim
21 words
The airbag of claim 17 wherein said finish is an additive added to said yarn prior to weaving of said cloth.
Claim 26
Dependent Claim
12 words
The airbag of claim 17 wherein said finish is a processing lubricant.
Claim 27
Dependent Claim
21 words
The airbag of claim 22 wherein said processing lubricant is a blend of mineral oil and at least one non-ionic surfactant.
Claim 28
Dependent Claim
15 words
The airbag of claim 1 wherein said cloth is woven in a 2/1 twill weave.
Claim 29
Dependent Claim
11 words
The airbag of claim 1 constructed and arranged without vent holes.
Claim 30
Dependent Claim
11 words
The airbag of claim 15 constructed and arranged without vent holes.
Claim 31
Dependent Claim
11 words
The airbag of claim 16 constructed and arranged without vent holes.
Claim 32
Dependent Claim
11 words
The airbag of claim 17 constructed and arranged without vent holes.
Claim 33
Independent Claim
87 words
A method of making an airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability, comprising the steps of: (A) providing an uncoated, woven, strong, lightweight, thin, flexible cloth of high permeability; and (B) calendering the cloth on both sides below its softening temperature to reduce the permeability to not more than three cubic feet of air per minute per square foot of cloth (1.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 34
Independent Claim
87 words
A method of making an airbag including a bag of strong, lightweight, thin, flexible fabric of low permeability, comprising the steps of: (A) providing an uncoated, woven, strong, lightweight, thin, flexible cloth of high permeability; and (B) calendering the cloth on both sides below its softening temperature to reduce the permeability to not more than three cubic feet of air per minute per square foot of cloth (1.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |