US5566434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air bag for use in a motor vehicle and method of producing same
Assignee: JPS AUTOMOTIVE LP A OF DELAWARE LP
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Filing: 1994-06-15
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Granted: 1996-10-22
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Expires: 2014-06-15
Abstract
Abstract An air bag of the type utilized in a vehicle occupant restraint system is constructed of a plurality of panels of uncoated fabric. Respective of the panels have been processed to achieve a selected air permeability with greater accuracy on a lot-to-lot basis than had generally been achieved with uncoated fabrics of the prior art. In one presently preferred methodology, the panels are first calendered under selected temperature and pressure conditions such that a low reference permeability is achieved. Next, respective of the panels may be needled such that the permeability is raised from the low reference permeability to a selected permeability level. Alternatively, a plurality of fluid jets, preferably water jets, may be utilized to impact panels of the uncoated fabric under selected operating conditions. Pores created by the fluid jets may be heat set to achieve a selected permeability.
Inventors
- 👤 Alonzo W. Beasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:21
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D06; D06C; D06C27/00; D06C29/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
74 words
A method of producing a fabric having a preselected permeability for use in a vehicle air bag, said method comprising the steps of: (a) providing a fabric constructed substantially entirely of synthetic yarn; (b) calendering the fabric at a selected temperature and a selected pressure to achieve a low reference permeability; and (c) processing the fabric having the low reference permeability to selectively increase a porosity thereof such that the preselected permeability is achieved.
Claim 2
Independent Claim
74 words
A method of producing a fabric having a preselected permeability for use in a vehicle air bag, said method comprising the steps of: (a) providing a fabric constructed substantially entirely of synthetic yarn; (b) calendering the fabric at a selected temperature and a selected pressure to achieve a low reference permeability; and (c) processing the fabric having the low reference permeability to selectively increase a porosity thereof such that the preselected permeability is achieved.
Claim 3
Dependent Claim
59 words
A method as set forth in claim 1, wherein step (c) comprises selectively needling the fabric utilizing a plurality of needles reciprocating at a selected rate into and out of engagement therewith to achieve a characteristic number of punctures per unit area, the characteristic number of punctures per unit area being related to permeability according to a predetermined relationship.
Claim 4
Dependent Claim
66 words
A method as set forth in claim 2, wherein step (c) comprises the following steps: (d) if the preselected permeability is less than a threshold permeability, then utilizing a plurality of barbless needles to increase the porosity of said fabric; and (e) if the preselected permeability is greater than the threshold permeability, then utilizing a plurality of barbed needles to increase the porosity of the fabric.
Claim 5
Dependent Claim
32 words
A method as set forth in claim 1, wherein the threshold permeability falls generally within a range of 3.0 CFM to 4.0 CFM at a pressure drop of 0.5 inch of water.
Claim 6
Dependent Claim
25 words
A method as set forth in claim 1, wherein the threshold permeability is approximately 3.5 CFM at a pressure drop of 0.5 inch of water.
Claim 7
Independent Claim
79 words
A method of producing a woven fabric having a preselected permeability for use in a vehicle air bag, said method comprising the steps of: (a) providing a woven fabric constructed substantially entirely of synthetic yarn; (b) directing a plurality of fluid jets onto the woven fabric under selected operating conditions to produce therein pores such that the preselected permeability is achieved; and (c) heating the fabric at a selected temperature for a selected duration to set the pores therein.
Claim 8
Independent Claim
79 words
A method of producing a woven fabric having a preselected permeability for use in a vehicle air bag, said method comprising the steps of: (a) providing a woven fabric constructed substantially entirely of synthetic yarn; (b) directing a plurality of fluid jets onto the woven fabric under selected operating conditions to produce therein pores such that the preselected permeability is achieved; and (c) heating the fabric at a selected temperature for a selected duration to set the pores therein.
Claim 9
Dependent Claim
20 words
A method as set forth in claim 6, wherein the plurality of fluid jets comprises a plurality of water jets.
Claim 10
Dependent Claim
31 words
A method as set forth in claim 7, wherein step (c) comprises heating the fabric at a temperature of 350 degrees Fahrenheit for a duration of at least twenty (20) seconds.
Claim 11
Dependent Claim
27 words
A method as set forth in claim 8, wherein the fabric is heated to a temperature generally falling within a range of 350 to 370 degrees Fahrenheit.
Claim 12
Independent Claim
94 words
A method of producing a vehicle air bag constructed substantially entirely of an uncoated fabric, said method comprising the steps of: (a) providing an uncoated fabric of synthetic yarn; (b) selectively processing a first portion of said uncoated fabric to achieve a first preselected permeability; (c) selectively processing at least one second portion of said uncoated fabric to achieve a second preselected permeability higher than the first preselected permeability; and (d) configuring the vehicle air bag utilizing both of said first portion of said uncoated fabric and said second portion of said uncoated fabric.
Claim 13
Independent Claim
94 words
A method of producing a vehicle air bag constructed substantially entirely of an uncoated fabric, said method comprising the steps of: (a) providing an uncoated fabric of synthetic yarn; (b) selectively processing a first portion of said uncoated fabric to achieve a first preselected permeability; (c) selectively processing at least one second portion of said uncoated fabric to achieve a second preselected permeability higher than the first preselected permeability; and (d) configuring the vehicle air bag utilizing both of said first portion of said uncoated fabric and said second portion of said uncoated fabric.
Claim 14
Dependent Claim
54 words
A method as set forth in claim 10, wherein said first portion of said uncoated fabric and said second portion of said uncoated fabric are selectively processed to have a permeability less than approximately two (2) CFM and greater than four (4) CFM, respectively, each at a pressure drop of 0.5 inches of water.
Claim 15
Dependent Claim
90 words
A method as set forth in claim 10, wherein steps (b) and (c) comprise the following steps: (e) calendering said uncoated fabric at a selected temperature and a selected pressure to achieve a low reference permeability; and (f) selectively needling said first portion of the uncoated fabric having the low reference permeability to increase a porosity thereof to achieve the first preselected permeability; and (g) selectively needling said second portion of the uncoated fabric having the low reference permeability to increase a porosity thereof to achieve the second preselected permeability.
Claim 16
Dependent Claim
42 words
A method as set forth in claim 12, wherein said first preselected permeability is less than approximately two (2) CFM and said second preselected permeability is greater than four (4) CFM, respectively, each at a pressure drop of 0.5 inches of water.
Claim 17
Dependent Claim
65 words
A method as set forth in claim 10, wherein steps (b) and (c) comprise the following steps: (e) directing a plurality of fluid jets onto the woven fabric under selected operating conditions to produce therein pores such that the preselected permeability is achieved; and (d) heating the woven fabric at a selected temperature for a selected duration to set the pores into the woven fabric.
References Cited (Backward Citations)
US2142728A
Cited
US3620903A
Cited
US3333315A
Cited
US3494821A
Cited
US3434188A
Cited
US3480547A
Cited
US3511519A
Cited
US3451693A
Cited
US3481625A
Cited
US3888504A
Cited
US3638755A
Cited
US3730551A
Cited
US3705645A
Cited
US3707746A
Cited
US3892425A
Cited
US3807754A
Cited
US3799574A
Cited
US3879056A
Cited
US3879057A
Cited
CA974745A
Cited
US3937488A
Cited
CA1025013A
Cited
US4031283A
Cited
US4324574A
Cited
US4569088A
Cited
US4543113A
Cited
EP0193078A1
Cited
US4673616A
Cited
EP0286246A2
Cited
US4967456A
Cited
US5136761A
Cited
US4932107A
Cited
US4898761A
Cited
US4921735A
Cited
US4828914A
Cited
US4872276A
Cited
US4963412A
Cited
US4959894A
Cited
US5114180A
Cited
US4977016A
Cited
US5010663A
Cited
US4977016B1
Cited
US5073418B1
Cited
US5073418A
Cited
US5018761A
Cited
US5093163A
Cited
EP0452163A1
Cited
US5098125A
Cited
US5213361A
Cited
US5302432A
Cited
US5131434A
Cited
US5215795A
Cited
US5193847A
Cited
US5356680A
Cited
US5296278A
Cited
US5252386A
Cited
GB2265122A
Cited
US5246250A
Cited
US5375878A
Cited
US5277230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |