MXPA00007356A - Airbag cushion exhibiting low seam usage and simultaneously high available inflation volume - Google Patents

Abstract

The present invention relates to an airbag cushion which exhibits a low amount of seam usage (in order to attach at least two fabric panels or portions of a panel together) in correlation to an overall high amount of available inflation airspace within the cushion itself. These correlated elements are now combined for the first time in what is defined as an effective seam usage index (being the quotient of the length of overall seams on the cushions and the available inflation airspace volume). The inventive cushion must have at least one substantially straight seam and must possess an effective seam usage factor of less than about 0.11. A cushion exhibiting such a low seam usage factor and also comprising an integrated looped pocket for the disposition of an inflator can is also provided as well as an overall vehicle restraint system comprising the inventive airbag cushion.

Description

AIR BAG CUSHION EXHIBITED UNDER SEWING AND HIGH INFLATION VOLUMES SIMULTANEOUSLY AVAILABLE Technical Field The present invention relates to an airbag cushion exhibiting a low amount of sewing use (in order to connect at least two cloth panels or bonded panel portions) in correlation with a high total amount of available air space, inside the cushion itself. These correlated elements are now combined for the first time in what is defined as an effective sewing wear index (which is the quotient of the total seam length on the cushions and the volume of inflation air space available). The cushion of the invention must have at least one substantially straight seam and must have an effective seam use factor of less than about 0.11. A cushion that exhibits this low sewing use factor and also comprises an integrated loop cavity for the placement of an inflator, can also be provided as well as a total vehicle restraint system comprising the air bag cushion of the invention. . BACKGROUND OF THE PRIOR ART Inflatable protective cushions used in passenger vehicles are a component of relatively complex passive receiving systems. The main elements of these systems are: an impact detection system, an ignition system, a propellant material, a connection device, a system enclosure and an inflatable protective cushion. Upon detecting an impact, the propellant is ignited causing an explosive release of gases that fill the cushion in an unfolded state, which can absorb the impact of forward movement of a body and dissipate its energy by rapid venting of the gas. The entire sequence of events occurs in approximately 30 milliseconds. In the undeployed state, the cushion is stored on or near the steering column, the dashboard, a door or the back of a front seat, placing the cushion in immediate proximity to the person or object that will protect . Inflatable cushion systems commonly referred to as airbag systems have been used in the past to protect both the vehicle operator and passengers. Systems for vehicle operator protection have typically been mounted on the steering column of the vehicle and have used cushion constructions directly deployable to the driver. These driver-side cushions are typically of a relatively simple configuration as they operate over a well-defined substantially small area between the driver and the steering column. Such a configuration is described in U.S. Pat. No. 5,533,755 issued to Nelsen et al. On July 9, 1996, the teachings of which are incorporated herein by reference. Inflatable cushions for use in the protection of passengers against frontal or lateral impacts in general must have a more complex configuration since the position of a passenger of a vehicle may not be well defined and there may be greater distance between the passenger and the surface of the vehicle against which the passenger can be thrown in the event of a collision. Prior cushions for use in these environments are described in U.S. Pat. No. 5,520,416 issued to Bishop on May 28, 1996; the U.S. Patent No. 5,454,594 granted to Krickl on October 3, 1995; Patent of the U.S.A. No. 5,423,273 issued to Hawthon et al. On June 13, 1995; Patent of the U.S.A. No. 5,316,337 issued to Yamaj i et al. On May 31, 1994; Patent of the U.S.A. No. 5,310,216 issued to Wehner et al., May 10, 1994; Patent of the U.S.A. No. 5,090,729 granted to Atanabe on February 25, 1992; Patent of the U.S.A. No. 5,087,071 issued to Wallner et al. On February 11, 1992; Patent of the U.S.A. No. 4,944,529 granted to Backhaus on July 31, 1990; and the U.S. Patent. No. 3,792,873 issued to Buchner et al. On February 19, 1974, all of which are incorporated herein by reference. Most commercially used restraint cushions are formed from woven fabric materials using and multifilament synthetics such as polyester, nylon 6 or nylon 6, 6 polymers. Representative fabrics for this use are described in US Pat. No. 4,921,735 granted to Bioch on May 1, 1990; Patent of the U.S.A. No. 5,093,163 issued to Krummheuer et al. On March 3, 1992; Patent of the U.S.A. No. 5,110,666 issued to Menzel et al. On May 5, 1992; Patent of the U.S.A. No. 5,236,775 issued to Swoboda et al. On August 17, 1993; Patent of the U.S.A. No. 5,277,230 issued to Sollars, Jr. on January 11, 1994; Patent of the U.S.A. No. 5,356,680 issued to Krummheuer et al. On October 18, 1994; Patent of the U.S.A. No. 5,477,890 granted to Krummheuer et al. On December 26, 1995; Patent of the U.S.A. No. 5,508,073 granted to Krummheuer et al. On April 16, 1996; Patent of the U.S.A. No. 5,503,197 issued to Bower et al. On April 2, 1996 and US Pat. No. 5,704,402 issued to Bowen et al. On January 6, 1998, all of which are hereby incorporated by reference. As will be appreciated, the permeability of the cushion structure is an important factor in determining the rate of inflation and subsequent rapid deflation following the impact event. In order to control the total permeability of the cushion, it may be convenient to use different materials in different regions of the cushion. In this way, the use of various fabric panels in the construction of the cushion can prove to be a useful design feature. The use of multiple cloth panels in the cushion structure also allows the development of relatively complex three-dimensional geometries that may be of benefit in the formation of cushions for passenger-side applications where a cushion for the entire body is desired. While the use of multiple fabric panels provides several advantages in terms of permeability handling and geometric design, the use of multiple fabric panels for use on passenger-side restraint cushions has historically required the assembly of panels having multiple dimensions. different geometries that involve multiple curved seams.

As will be appreciated, an important consideration when cutting panel structures from a base material is the ability to maximize the number of panels that can be cut from a fixed area through the closed packaged housing of the panels. It has been found that minimizing the number of different geometries that make up the panels in the cushion and using geometries with substantially straight linear perimeter configurations, generally allow an improved number of panels to be cut from the base material. The use of panels having generally straight line profiles has the added benefit of allowing the panels to connect to each other using substantially straight seams or to form substantially during the interweave process using a jacquard or machine loom. For the purposes of this invention, the term "sewing" shall be understood as any connection point between different fabric panels or different portions of the same fabric panel. In this way, a seam can be made (such as with yarn), welded (such as by ultrasonic stitching), woven (such as jacquard or machine loom, as examples simply), and the like. The key aspect with respect to the seam length within this invention relates to the ability to form a volume cushion with a high inflation air space available with the lowest amount of labor required. Since sewing, welding, etc., to connect panels or portions of panels greatly increases the time needed to produce air bag cushions, it is highly desirable to reduce the labor time that can be achieved through reduction. in the length of the required seams. Substantially straight seam configurations, in this way provide more cost effective methods to produce these airbags. However, even with the use of substantially straight seams to produce air bag cushions, there still remains a problem in the need for labor-intensive cutting and sewing operations for large scale manufacturing. There remains a need to reduce the amount of time in producing airbag cushions while simultaneously providing the largest amount of fabric to allow a sufficient volume of air (gas) to inflate the target airbag cushion during an airbag event. inflated (here described as "available inflation air space"). This method and desired product have not been available, particularly for passenger-side airbags, which as noted previously, require large amounts of fabric for large volumes of air (gas) to provide the largest amount of protection area to a passenger. With larger quantities of fabric required, this has generally resulted in the need for longer seams to connect and add fabric panels, which in turn translates into greater amounts of time required for sewing and the like. Thus, there is a need to produce cushions with air bag volume of high inflated air space available with minimum requirements in seam lengths to manufacture the total cushion product. The previous technique has not granted any advance or even discussions for this effect. BRIEF DESCRIPTION OF THE INVENTION In view of the above, a general objective of the present invention is to provide a cost-effective, easy-to-manufacture air bag cushion for use within a vehicle restraint system. The term vehicle restraint system is intended to mean both the inflatable cushion for occupant restraint and the mechanical and chemical components (such as inflation means, ignition means, propellant and the like). A more particular objective of the present invention is to provide a vehicle restraint system, wherein the objective air bag cushion preferably requires that all substantially straight seams connect their plurality of fabric components together (although as noted above, other configured seams may also be employed as long as the effective sewing use factor total required, is met). A further object of this invention is to provide an easy-to-assemble airbag cushion that is of minimum labor intensity to manufacture, which also comprises an integrated loop cavity for placing an inflation can inside the bag cushion. of air. A further objective of this invention is to provide a vehicle restraint system comprising an air bag cushion, which provides the maximum amount of inflation air space volume available simultaneously with the lowest length of seam (or seams) necessary to manufacture the cushion.

Another object of the invention is to provide a method for producing a low cost air bag cushion (due to the low levels of labor required to sew the component parts together), simple and structurally efficient design. To achieve these and other objects and in accordance with the purpose of the invention, as widely incorporated and described herein, the present invention provides an air bag cushion having at least one substantially straight seam, wherein the bag cushion of air has an efficient sewing use factor of less than about 0.11, wherein the sewing use factor is derived from a seam wear index which is (and is defined as) the quotient of the total length of the seams present inside the air bag cushion measured in meters (over the total volume of the inflation air space available inside the air bag cushion) measured in milliliters). As noted above, the seam itself may be applied by any well-known operation, including, but not limited to, thread sewing, ultrasonic sewing and the like or it may be woven into the fabric in a jacquard or loom and such. The term "available inflation air space" as elucidated above, connotes the volume within which air (gas) would be transferred from an inflation structure to the air bag cushion during inflation and consequently, the inflation event . This air bag cushion should generally have at least one substantially straight seam, although preferably each seam has that specific configuration. In order to produce this specific airbag cushion in fact, it is evident that the amount of stitching, basting and the like required to form the final product, must be very low. A curved seam, although possible in this invention, requires potentially longer lengths of thread, etc., in order to connect the different tissue components of the objective cushion. As a result, the use of curved or other non-straight seams should be minimized. The effective sewing use factor (as defined within the formula for previous correlation seam use index (for the air bag cushion of the invention then, preferably is less than about 0.10, more preferably less than 0.09 , still more preferably less than 0.07, even more preferably less than 0.06 and in particular less than 0.05.Thus, the volume of inflation air space available within the air bag cushion should be as large as possible with the length of the seam reduced to its absolute minimum.A one-piece construction in general will have a relatively low volume of inflation air space, although the length of the total number of seams can be quite low; conductor, will generally consist of many seams (of relatively large total length) particularly curved seams, and a relatively low volume correlative of available air space; and prior art passenger side airbags require complex sewing operations with numerous and rather long seams. Although the volume of inflation air space available in these passenger side airbags is rather large, the total length of all the seams used in general is very large to meet the aforementioned effective sewing use factor inside. of the index. The present invention also provides an air bag cushion having the required effective sewing use factor which also comprises a loop cavity for introducing an inflation structure. In the most preferred embodiment, a large body panel is used that has two image portions in the mirror, which when folded in the middle of the panel of the fabric, the borders of both portions are aligned. A substantially straight seam is then used to seal the adjacent (and similarly shaped) side to the folded side and two openings will remain. The large opening is then covered by a rectilinear panel; The small opening (opposite the large opening) will have extra fabric that can be overlapped (to provide extra reinforcement fabric at the potential inflation point) and stitch to form the desired cavity where the inflation can is placed.

This modality is discussed below in more detail. Further objects and advantages of the invention will be set forth in part in the description that follows and in part will be apparent from the description or may be learned by practice of the invention. It will be understood that both the foregoing general description and the following detailed description of preferred embodiments are exemplary and explanatory only, and will not in any way be seen in any way as to the scope of the invention as set forth in the claims. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and construct a part of this specification, illustrate several potentially preferred embodiments of the invention and together with the description serve to explain the principles of the invention, wherein: Figure 1 is an aerial view of a portion of a fabric web with lines indicating specific preferred locations for cutting to form two sets of fabric panels for making two separate cushions of the invention, each to be included within a system of vehicle restriction, configured inside a module that is stored substantially vertical. Figure 2 is an aerial view of a preferred cut fabric panel, with smaller second and third preferred cut panels connected. Figure 3 is an aerial view of the connected preferred cut fabric panels, illustrating the first step of bending to produce the mouth portion of the objective cushion. Figure 4 is an aerial view of the preferred cut fabric panels connected, showing the second bending step to produce the mouth portion of the objective cushion. Figure 5 is an aerial view of the connected preferred cut fabric panels, showing the third bending step, to produce the mouth portion of the objective cushion, as well as all the connected fabric panel composite folded and connected to itself . Figure 6 is an aerial view of the preferred cut fabric front panel of the objective cushion. Figure 7 is a front view of the finished objective cushion showing the preferred front panel and substantially straight seams connecting the front panel to the remaining preferred cut fabric panels. Figure 8 is a side view of the finished objective cushion, unfolded and not inflated. Figure 9 is an exploded side view of a vehicle for transporting an occupant illustrating the deployment of an inflatable restriction cushion, within a vehicle restraint system in accordance with the present invention.

Figure 10 is an aerial view of a portion of a fabric web with lines indicating specific preferred locations for cutting to form two sets of fabric panels to make two separate cushions of the invention, each to be included within a vehicle restriction system configured within a module that is stored substantially horizontally. Figure 11 is an aerial view of a preferred cut fabric panel with second and third preferred smaller, connected cutting panels. Figure 12 is an aerial view of the connected preferred cut fabric panels showing the first bending step to produce the mouth portion of the objective cushion. Figure 13 is an aerial view of the connected preferred cut fabric panels showing the second bending step to produce the mouth portion of the objective cushion. Figure 14 is an aerial view of the preferred cut fabric panels connected showing the third bending step to produce the mouth portion of the objective cushion as well as all the cloth panel composite connected, folded and connected to itself. Figure 15 is an aerial view of the preferred cut fabric front panel of the objective cushion.

Figure 16 is a front view of the finished objective cushion, showing the preferred front panel and the substantially straight seams connecting the front panel with the remaining preferred cut fabric panels. Figure 17 is a side view of the finished objective cushion, without bending and not inflated. Figure 18 is an exploded side view of a vehicle for transporting an occupant illustrating the deployment of an inflatable restriction cushion within a vehicle restraint system in accordance with the present invention. Figure 19 is an aerial view of a portion of a fabric web with lines indicating specific preferred locations for cutting, to form two sets of fabric panels to make two separate cushions of the invention, each providing means for a integrated mouth in order to form a cavity for the location of an inflation can there. Figure 20 is an aerial view of a preferred cut fabric panel with second and third preferred smaller cutting panels connected. Figure 21 is an aerial view of the preferred cut fabric panels connected showing the entire composite of cloth panels connected, folded and connected to itself. Figure 22 is an aerial view of the preferred cut fabric front panel of the objective cushion. Figure 23 is a front view of the finished objective cushion showing the preferred front panel and the substantially straight seams connecting the front panel with the remaining preferred cut fabric panels. Figure 24 is a top view of the finished objective cushion, unfolded and not inflated. Figure 25 is a side view of the finished, unfolded and uninflated objective cushion, including the integrated mouth structure for placing an inflation can there. Figure 26 is an exploded side view of a vehicle for transporting an occupant, illustrating the deployment of an inflatable restriction cushion within a vehicle restraint system in accordance with the present invention. DESCRIPTION OF THE PREFERRED MODALITIES Reference is now made in detail to potentially preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. It will be understood that in no way is it intended to limit the invention to said illustrated and described modes. On the contrary, it is intended to cover all the alternative modifications and equivalents as may be included within the spirit and actual scope of the invention as defined by the appended claims and their equivalents. Turning now to the drawings, in which similar elements are denoted by like reference numbers throughout the various views, in Figure 1 there is illustrated a web 10, wherein eight panels of fabric to be cut 12, 14, 16, 18, 20, 22, 24, and 26, have been delineated. Also, specific pieces of fabric to be removed and grooves 28, 30, 32 within the two larger cloth panels 12, 14 are delineated equally. The fabric web 10 in this specific example comprises nylon 6,6, 630 denier yarns, woven fabrics on a jacquard loom 10 comprising 41 weft yarns per 41 ends per 2.54 cm (inch). In Figure 2, two smaller preferred fabric panels 16, 18 have been connected to a large preferred fabric panel 12 by substantially straight seams 34, 36, 38, 40. The composite fabric structure now has two small fabric portions. 39, 41 discovered by the two smaller cloth panels 16, 18. The clearance 30 remains and an imaginary straight line 42 denotes the future fold line within the fabric composite of the fabric panels 12, 16, 18. In Figure 3, tensioners 42, 44 have been placed on the small cloth portions 39, 41 parallel to the seams 38, 40, and the fabric portions 39, 41 have been folded back in a shape to form a right angle to the point of contact between the two portions 39, 41. In Figure 4, the small portions of fabric 39, 41 have been folded once again and the seams 35, 37 have been produced to connect the fabric portions 39, 41 to themselves and the smaller cloth panels 16, 18 The folded fabric portions 39, 41 provide reinforcement in order to withstand the inflation pressures at the mouth opening of the cushion. In Figure 5, the fabric panel 12 has been folded over the imaginary line 42 (in the middle), leaving only a small cloth panel 16 in view (the other is not illustrated since it is now located in the portion of bottom of cloth panel 12, directly below the smaller cloth panel 18). A seam 46 connects the cloth panel 12 to itself and also connects the smaller cloth panels 16, 18 to both the larger panel 12 and itself. Upon unfolding the connected composite, the unconnected ends of the panel 12 will form the same structure as the front panel 24 of Figure 6. Figure 7 then shows the seam 48 required to sew the non-connected ends of the large panel 12 (of the Figure 5), and Figure 8 provides a side view of the finished cushion 50 after the entire connection through the seams 38, 42, 34, 46 has been made. Figure 9 shows a fully deployed inflatable restriction cushion 50 in opposed relation to an occupant 52 located in the front seat 54 of a vehicle 56 such as a car, airplane and the like. As illustrated, the cushion 50 can be deployed outwardly from the dotted panel 57 through an inflation means 58 from a position directly opposite the occupant 52. It will be understood, however, that the cushion 50 can likewise be deployed from any other desired location. in the vehicle 56, including the steering wheel (not shown), the side panels of the vehicle (not shown), the floor (not shown) or the backrest of the front seat 54 to place in opposite relation to a rear passenger (not shown) ). In Figure 10, a fabric plot is illustrated 110, where eight panels of fabric to be cut 112, 114, 116, 118, 120, 122, 124, and 126 have been delineated. Also, specific grooves 128, 129, 130, 32 within the two largest cloth panels 112, 114 are profiled equally. The fabric web 110 in this specific example comprises nylon 6,6, 630 denier yarns, woven fabrics on a jacquard loom 10 comprising 41 weft yarns by 41 ends per 2.54 cm (inch). In Figure 11, two smaller preferred fabric panels 116, 118 have been connected to a large preferred fabric panel 112 by substantially straight seams 144, 146, 148. The composite fabric structure now has two small fabric portions 131, 150, 152 uncovered by the two smaller fabric panels 116, 118. An imaginary straight line 142 denotes the future fold line within the fabric composite of the fabric panels 112, 116, 118, which is markedly off-center for the purpose end of allowing the bag to be deployed at an angle from a horizontally placed board (not shown). In Figure 12, tensioners 153, 155 have been placed on the small cloth portions 150, 152 and folded back over the tensioners 153, 155 as illustrated, folded again as in Figure 13, and connected to each other. same by the seams 152, 156. The folded fabric portions 150, 152 provide reinforcement in order to withstand inflation pressures in the mouth opening of the cushion. In Figure 14, the fabric panel 112 has been folded over the imaginary line 142 leaving only a small fabric panel 116 in view (the other is not illustrated as it is now located in the bottom portion of the fabric panel 112). directly below the smaller cloth panel 118). A seam 158 connects the fabric panel 112 to itself and also connects the smaller fabric panels 116, 118 to both the larger panel 112 and itself. Upon unfolding the connected composite, the unconnected ends of the panel 112 will form the same structure as the front panel 124 of Figure 15. Figure 16 then shows the seam 159 required to sew the non-connected ends of the large panel 112 (of the Figure 1). 14), and Figure 17 provides a side view of the finished cushion 160. Figure 18 shows a fully deployed inflatable restriction cushion 160 in opposed relation to an occupant 162 located in the front seat 164 of a vehicle 166 such as an automobile, airplane and similar. As illustrated, the cushion 160 can deploy outwardly from the board 167 through an inflation means 168 from a position directly opposite the occupant 162. It will be understood, however, that the cushion 160 can likewise be deployed from any other desired location in the the vehicle 166 including the steering wheel (not shown), the side panels of the vehicle (not shown), the floor (not shown) or the backrest of the front seat 164 to place in opposite relation to a rear passenger (not shown). In Figure 19, a fabric weft 210 is illustrated, where eight fabric panels to be cut have been delineated 212, 214, 216, 218, 220, 222, 224, and 226. Also, pieces of specific fabrics to be removed and slots 228, 230, 232, within the two largest cloth panels 212, 214 are delineated equally. The fabric web 210 in this specific example comprises nylon 6,6, 630 denier yarns, woven fabrics in a jacquard loom in a fabric 210 comprising 41 weft yarns by 41 ends per 2.54 cm (inch). In Figure 20, two smaller preferred fabric panels 216, 218 have been connected to a preferred large fabric panel 212 by substantially straight seams 234, 236, 238, 240. An imaginary straight line 242 denotes the future fold line within of the fabric composite of the fabric panels 212, 216, 218. In Figure 21, the fabric panel 212 has been folded over the imaginary line 242 (in the middle) leaving a smaller cloth panel 216 in view ( the other is not illustrated since it is now located in the bottom portion of the cloth panel 212 directly below the smaller cloth panel 218). A seam 244 connects the fabric panel 212 to itself and also connects the smaller fabric panels 216, 218 to both the larger panel 212 and himself. Upon unfolding the connected composite, the unconnected ends of the panel 212 will form the same structure as the front panel 224 of Figure 22. Figure 23 then shows the seam 252 required to sew the non-connected ends of the large panel 212 (of the Figure 21), and Figure 24 provides a top view of a finished cushion 246 and Figure 25 provides a side view of a finished cushion 250, after all connections have been made through the seams 234, 244, 248. Figure 26 shows a fully deployed inflatable restriction cushion 260, in opposite relation to an occupant 262 located in the front seat 264 of a vehicle 266 such as a car, airplane and the like. As illustrated, the cushion 260 can be deployed outwardly from the board 267 through an inflation means 268 from a position directly opposite the occupant 262. It will be understood, however, that the cushion 260 can likewise be deployed from any other desired location in the the vehicle 266, including the steering wheel (not shown), the side panels of the vehicle (not shown), the floor (not shown) or the backrest of the front seat 264 to place in opposite relation to a rear passenger (not shown) .

These specific configurations and shapes provide for the use of lower total stitching compared to the volume of available inflation air space. Specific measures for each cushion of the invention manufactured in this configuration (but with different amounts of fabric used) are further described in Table 2, below. Each of the panels used in these preferred embodiments can be formed into a number of materials including, by way of example only and limitation, woven fabrics, woven fabrics, non-woven fabrics, films and combinations thereof. Woven fabrics may be preferred, with woven fabrics formed of a tightly woven construction such as taffeta or panama weave constructions which are particularly preferred. These woven fabrics may be formed from polyester yarns, polyamides such as nylon 6 and nylon 6, 6 other convenient material as may be known to those skilled in the art. Multifilament yarns having a relatively low denier rating per filament no greater than about 1-4 denier per filament, may be suitable for bags that require particularly good foldability or good folding.

In application, woven fabrics formed from synthetic yarns having linear densities of about 40 deniers to about 1,200 deniers are considered useful in the formation of the air bag according to the present invention. Fabrics formed of yarns having linear densities of about 315 to about 840 are considered particularly useful, and fabrics formed of yarns having linear densities in the range of about 400 to about 650 are considered the most useful. While each of the panels can be formed of the same material, the panels can also be formed of different materials and constructions such as, without imitation, coated or uncoated fabrics. These fabrics can provide high permeability fabrics having air permeability of about 2,360 cm / sec (5 CFM) per 929 cm 2 (square foot) (or higher, preferably less than about 1,416 cm / sec (3 CFM) per 929 cm 2) (square foot) or less when measured at a differential pressure of 1.27 cm (0.5") of water through the fabric, fabrics having permeabilities of approximately 472 to 1,416 cm / sec (1 to 3 CFM) per 929 cm2 ( square fabrics)) may be equally suitable Fabrics having permeability below 944 cm / sec (2 CFM) and preferably less than 472 cm / sec (1 CFM) in the uncoated state may be preferred. having permeability below 944 cm / sec (2 CFM) whose permeability does not substantially increase by more than a factor of about 2 when the fabric is subjected to biaxial stresses in the range of approximately 45.4 pounds (100 pounds force), may be preferred in particular, fabrics that exhibit The characteristics that are formed by interweaving fluid jet may be the most preferred, although as previously noted, woven in jacquard and / or loom machine also allows a seam production without need for greater welding or intense sewing operations in additional labor. In the case where the coating is used in one or more panels of material, neoprene, silicone or urethanes or dispersed polyamides may be preferred. Coatings such as dispersed polyamides having dry addition weights of about 20.34 g / m2 (0.6 ounces per square yard) or less and more preferably about 13.56 g / m2 (0.4 ounces per square yard) or less and particularly preferably about 10.17 g / m2 (0.3 ounces per square yard) or less, can be particularly preferred in order to minimize the weight of the fabric and improve the folding. Of course, it should be understood that apart from the use of coatings, different characteristics can also be achieved in various panels through the use of fabrics that incorporate different densities of interwoven and / or finishing treatments such as calendering., as it can be known by those with skill in the specialty. While the air bag cushions according to the present invention have been illustrated and described herein, it will be understood that these cushions may also include additional components such as shapes defining belts, air vents and the like, as may be known. by those with skill in the specialty. With respect to comparable air bag cushions, the following table presents comparative sewing use factors for other well-known and commercially available air bag cushions. The labels used are those used in Standard &; Poor's DRI, a well-known publication that denote many different types of products offered for sale to the automotive industry.

Table 1 Sewing use index factors for commercially available air bag cushions. No. DRI Total Length Volume of S & P Factor of seams total seam space (m) ("A") in (L) fied air available (A / B) nible (L) ("B) GM -C4 12. .42 95.00 0.1307 W202 14. .83 129.00 0.1150 GM4200 12, .43 90.00 0.1381 414T 14. .83 128.00 0.1159 CY 14. .83 128.00 0.1159 CF 16. .83 128.00 0.1315 The 414T and CF bags listed above are inclined cushions for use in conjunction with relatively horizontal boards, the others are used in conjunction with boards configured in substantially vertical form.In general, an airbag module manufacturer or automotive manufacturer will specify what dimensions and performance characteristics are required for A specific model and model of car, in this way, volume of air space for inflating the airbag, front panel protection area (particularly for airbag cushion on the passenger side) and sufficient total protection for a passenger, are these required specifications. In comparison with those commercially available air bag cushions listed above, the air bag cushions of the invention that meet the same specifications (and in fact exceed the total passenger protection characteristics against the cushions of the prior art) but they require less fabric, less length of seam for sewing operation, and in this way they cost appreciably less than those competitive cushions. The dimensions and sewing use factors for the bags of the invention (which are compared with those in Table 1, above, directly and as noted) will be presented below in tabular form and are the same general form as those presented within of the drawings described above (but large pieces of cloth panels, etc.): Table 2 Sewing wear index factors for air bag cushions of the invention in correlation with air bag cushions with S &P DRI numbers that require similar dimensions and performance characteristics. Number of Total Length Volume of Seam Bags Factor sewing space DRI S &P total (m) ("A") air in (L) fied available (A / B) nible (L) ("B" ) GM-C4 7.56 95.00 0.0796 202 6.90 129.00 0.0535 GM4200 7.20 90.00 0.0800 414T 6.90 128.00 0.0539 C CYY 5 5..3355 128.00 0.0418 CF 6.90 128.00 0.0539 Clearly, the bags of the invention that have the same volume of air space for inflation available front panel cloth area as the commercially available pads of prior comparative technique (bags) require much less in the form of total seam length, which in this way correlates in total much less effective sewing wear factors . Furthermore, as noted above, in standard impact tests, these bags of the invention (cushions) either perform like or outperform their more expensive commercially available counterparts. While specific embodiments of the invention have been used and described, it will be understood that the invention is not limited thereto, since modifications and other embodiments of the principles of this invention can certainly be made, no doubt will occur to those with skill in the specialty. Therefore, it is contemplated by the appended claims to cover all these modifications and other embodiments that incorporate the characteristics of this invention which is the spirit and actual scope of the appended claims.

Claims (16)

1. CLAIMS 1.- An air bag cushion, comprising at least one substantially straight seam in order to connect either (a) at least two cloth panels or (b) at least two portions of a single cloth panel, in where the airbag cushion has an effective sewing wear factor of less than 0.11.
2. 2. The air bag cushion of claim 1, characterized in that it has an effective sewing wear factor of less than about 0.09.
3. 3. The air bag cushion of claim 2, characterized in that it has an effective sewing wear factor of less than about 0.09.
4. 4. The air bag cushion of claim 3, characterized in that it has an effective sewing wear factor of less than about 0.07.
5. 5. The air bag cushion of claim 4, characterized in that it has an effective sewing wear factor of less than about 0.06.
6. 6. The air bag cushion of claim 5, characterized in that it has an effective sewing wear factor of less than about 0.05.
7. 7. The air bag cushion of claim 1, characterized in that the air bag cushion comprises a loop cavity in which an inflation vessel can be placed.
8. 8. The air bag cushion of claim 7, characterized in that the air bag cushion further comprises tensioners.
9. 9. A system for vehicle restriction comprising the air bag cushion according to claim 1.
10. 10. A system for vehicle restriction comprising the air bag cushion according to claim 2.
11. 11. - A system for vehicle restriction comprising the air bag cushion according to claim 3.
12. 12. A system for restricting vehicle comprising the air bag cushion in accordance with claim 4.
13. 13. - A vehicle restraint system comprising the airbag cushion according to claim 5.
14. 14. A vehicle restraint system comprising the airbag cushion according to claim 6.
15. 15. - A system for vehicle restriction comprising the air bag cushion according to claim 7.
16. 16. A system for vehicle restriction comprising the air bag cushion according to claim 8.