US4213634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction of stitching portions of gas bags
Assignee: Toyota Motor Corp
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Filing: 1979-02-05
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Granted: 1980-07-22
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Expires: 1999-02-05
Abstract
Abstract Gas bags for absorbing emergency shocks exerted on automobile occupants in case of collisions, and particularly gas bags made of fabric, are so constructed that the stitched portions will not be torn apart by the inflating pressure of an instantly produced inflating gas. The stitching portions of the gas bags are so constructed that a plurality rows of seams of stitching yarns arrayed along the margin are coarsened toward the outer side such that the tensile load instantaneously exerted on the stitching portions is uniformly dispersed.
Inventors
- 👤 Tadayoshi Hoshino
- 👤 Yoichi Sudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:49
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; B60R2021/23571; B60R2021/23576
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
In an inflatable gas safety bag system for use in the protection of passengers in motor vehicles in the event of collision, including a gas bag and means for rapidly inflating said bag with a gas upon collision, the improvement comprising the gas bag being formed of overlapping fabric pieces sewn together along stitch margins with a plurality of laterally spaced rows of stitches, the improvement comprising means to substantially uniformly distribute tensile load, on inflation of said bag, among said spaced rows of stitches, said means comprising at least three said rows of stitches wherein the middle of said rows of stitches has a relatively fine stitch pitch and the outer of said rows of stitches have relatively coarse stitch pitches.
Claim 2
Dependent Claim
122 words
In an inflatable gas safety bag system for use in the protection of passengers in motor vehicles in the event of collision, including a gas bag and means for rapidly inflating said bag with a gas upon collision, the improvement comprising the gas bag being formed of overlapping fabric pieces sewn together along stitch margins with a plurality of laterally spaced rows of stitches, the improvement comprising means to substantially uniformly distribute tensile load, on inflation of said bag, among said spaced rows of stitches, said means comprising at least three said rows of stitches wherein the middle of said rows of stitches has a relatively fine stitch pitch and the outer of said rows of stitches have relatively coarse stitch pitches.
Claim 3
Dependent Claim
31 words
A bag in accordance with claim 1, wherein the yarns from which said stitches are formed are no greater in strength than the strength of the yarns forming said fabric pieces.
Claim 4
Dependent Claim
33 words
A bag in accordance with claim 1, wherein the seams are so stitched as will not overlap as far as possible when viewed from a direction at right angles to the stitch yarns.
Claim 5
Dependent Claim
15 words
A bag in accordance with claim 1, wherein there are four said rows of stitches.
Claim 6
Dependent Claim
31 words
A bag in accordance with claim 4, wherein the stitch pitches of the two middle rows are essentially equal, and the stitch pitches of the two outer rows are essentially equal.
Claim 7
Dependent Claim
17 words
A bag in accordance with claim 1, wherein there are more than four said rows of stitches.
Claim 8
Dependent Claim
18 words
A bag in accordance with claim 6, wherein there are an even number of said rows of stitches.
Claim 9
Dependent Claim
27 words
A bag in accordance with claim 6, wherein from the middle-most of said rows of stitches to the outer-most rows of stitches the pitch becomes progressively greater.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |