Patent US4186941A successfully refreshed from Google Patents.
US4186941A
Expired / Lapsed
US
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Inflatable impact protection cushion
Assignee: Daimler Benz AG
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Filing: 1978-05-03
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Granted: 1980-02-05
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Expires: 1998-05-03
Abstract
Abstract An inflatable impact cushion for passengers of a motor vehicle, which in case of an accident is adapted to be selectively filled with the available gas by the increasing pressure by means of several sequentially triggerable ignition stages depending on the strength of the deceleration; in the starting condition, a portion of the protective cushion is separated off by a seam or the like, while the seam or the like is destroyed by the increasing pressure in such a manner that in the end condition the entire volume of the protective cushion is available.
Inventors
- 👤 Hansjurgen Scholz
- 👤 Luigi Brambilla
- 👤 Hans-Gerd Backhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:00
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/231; B60R21/2334; B60R21/2342; B60R21/26; B60R21/263; B60R2021/2633
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
An inflatable impact protection cushion for a passenger of a motor vehicle, said cushion comprising a bag expandable to a maximum volume and separating means separating a portion of the bag from the remainder thereof for limiting the degree of expansion of said bag to a volume less than said maximum volume when an internally supplied gas exerts an expansion pressure below a predetermined value, said separating means being constructed for being rendered inoperative when said gas exerts an expansion pressure greater than said predetermined value to enable said bag to be expanded to said maximum volume, and inflation means for initially supplying said gas in a manner exerting said pressure less than said predetermined value to initially expand said bag to said lesser volume and for subsequently supplying an additional amount of gas in a manner exerting a pressure greater than said predetermined value to expand said bag to said maximum volume.
Claim 2
Dependent Claim
153 words
An inflatable impact protection cushion for a passenger of a motor vehicle, said cushion comprising a bag expandable to a maximum volume and separating means separating a portion of the bag from the remainder thereof for limiting the degree of expansion of said bag to a volume less than said maximum volume when an internally supplied gas exerts an expansion pressure below a predetermined value, said separating means being constructed for being rendered inoperative when said gas exerts an expansion pressure greater than said predetermined value to enable said bag to be expanded to said maximum volume, and inflation means for initially supplying said gas in a manner exerting said pressure less than said predetermined value to initially expand said bag to said lesser volume and for subsequently supplying an additional amount of gas in a manner exerting a pressure greater than said predetermined value to expand said bag to said maximum volume.
Claim 3
Dependent Claim
24 words
An inflatable cushion according to claim 1, wherein said inflation means comprises multiple ignition stages and means operable for selectively triggering said ignition stages.
Claim 4
Dependent Claim
20 words
An inflatable impact protection cushion according to claim 1 or 2, characterized in that the separating means is a seam.
Claim 5
Dependent Claim
19 words
An inflatable impact protection cushion according to claim 3, characterized in that the seam is approximately semi-eliptical in shape.
Claim 6
Dependent Claim
29 words
An inflatable impact protection cushion according to claim 4, characterized in that the seam of the separating means, separates off a pleat from the remaining volume of the cushion.
Claim 7
Dependent Claim
28 words
An inflatable impact protection cushion according to claim 1 or 2 characterized in that the separating means, separates off a pleat from the remaining volume of the cushion.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |