US5280954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable impact protection cushion
Assignee: Mercedes Benz Group AG
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Filing: 1992-07-02
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Granted: 1994-01-25
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Expires: 2012-07-02
Abstract
Abstract In an impact protection cushion which can be accommodated in the steering wheel region for protection of the vehicle driver, a tearing seam is provided which joins the cushion upper part, which moves forward upon inflation, to the cushion lower part fastened to a fixed vehicle part. This arrangement prevents any radiating forward movement of parts of the cushion upper part, in particular, of a central region laying opposite the gas inflow opening in the cushion lower part without restraining straps.
Inventors
- 👤 Wolfgang Henseler
- 👤 Ulrich Tschaschke
- 👤 Manfred Muller
- 👤 Luigi Brambilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:38
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/231; B60R21/2334; B60R21/2342
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
An inflatable impact protection cushion of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein the at least one tearing seam further comprises four circular arc sections respectively abutting one another in pairs to form an inflection, the center points of which sections all have the same distance from a center point of the cushion upper part and are offset by 90° from one another.
Claim 2
Dependent Claim
150 words
An inflatable impact protection cushion of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein the at least one tearing seam further comprises four circular arc sections respectively abutting one another in pairs to form an inflection, the center points of which sections all have the same distance from a center point of the cushion upper part and are offset by 90° from one another.
Claim 3
Dependent Claim
161 words
An inflatable protection cushion of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein two tearing seams are provided along two coaxial circular lines with a different radius, which tearing seams are arranged approximately symmetrically with respect to the center point of an approximately circular cushion upper part wherein the outer tearing seam with a first radius has a lower tearing strength than the inner tearing seam with a second radius smaller than the first radius.
Claim 4
Dependent Claim
161 words
An inflatable protection cushion of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein two tearing seams are provided along two coaxial circular lines with a different radius, which tearing seams are arranged approximately symmetrically with respect to the center point of an approximately circular cushion upper part wherein the outer tearing seam with a first radius has a lower tearing strength than the inner tearing seam with a second radius smaller than the first radius.
Claim 5
Dependent Claim
123 words
An inflatable impact protection cushion, of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein approximately radially extending tearing seams are provided in a stellate configuration and at least one tearing seam has an approximately tangentially extending section.
Claim 6
Dependent Claim
123 words
An inflatable impact protection cushion, of disc-shaped form, comprising a cushion lower part, fastened to a fixed vehicle part, and provided with an approximately central inlet opening and, a circular cushion upper part which, upon inflation, moves forward away from the cushion lower part and is joined to the cushion lower part at an edge, the cushion upper part being configured such that, in the installed position, it is joined to the cushion lower part by at least one tearing seam extending in a central region along a continuous curve which surrounds the opening on the cushion lower part, wherein approximately radially extending tearing seams are provided in a stellate configuration and at least one tearing seam has an approximately tangentially extending section.
References Cited (Backward Citations)
DE2030863A1
Cited
DE2552815A1
Cited
US4186941A
Cited
DE2944319A1
Cited
US4541504A
Cited
US4458921A
Cited
USRE33398E
Cited
US4645232A
Cited
US4917210A
Cited
US5114090A
Cited
US4982981A
Cited
US4999004A
Cited
EP0420664A1
Cited
US5104193A
Cited
JPH03136943A
Cited
JPH03136945A
Cited
US5118135A
Cited
US5094477A
Cited
US5143403A
Cited
JPH0456652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |