US4944528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic-ignition device for vehicle crash protection device
Assignee: Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
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Filing: 1989-07-07
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Granted: 1990-07-31
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Expires: 2009-07-07
Abstract
Abstract An automatic-ignition device for a vehicle crash protection device for passengers having a gas generator, whereby a reliable automatic releasing action is attained in case of an overheating, especially when a light-metal main gas generator housing is used. A primary ignition mixture is contained in a housing structure which is thermally insulated from the main gas generator housing. The primary mixture housing structure forms a heat seal thermally insulated from the main gas generator housing.
Inventors
- 👤 Karl E. Nilsson
- 👤 Siegfried Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:18
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B60R21/2644; B60R2021/26064
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
An automatic-ignition device for a vehicle crash protection device for passengers having a gas generator arranged in a housing, said gas generator comprising a primary igniting mixture ignitable at a low ambient temperature and being embedded in a primary igniting mixture metal housing structure containing a window, the window having a dam and being aligned toward a secondary igniting mixture for generating gas, the primary igniting mixture metal housing structure being disposed thermally insulated in an outer wall of the gas generator housing such that, in the area of the outer wall, a heat sink is formed, which is thermally insulated from the gas generator housing.
Claim 2
Dependent Claim
106 words
An automatic-ignition device for a vehicle crash protection device for passengers having a gas generator arranged in a housing, said gas generator comprising a primary igniting mixture ignitable at a low ambient temperature and being embedded in a primary igniting mixture metal housing structure containing a window, the window having a dam and being aligned toward a secondary igniting mixture for generating gas, the primary igniting mixture metal housing structure being disposed thermally insulated in an outer wall of the gas generator housing such that, in the area of the outer wall, a heat sink is formed, which is thermally insulated from the gas generator housing.
Claim 3
Dependent Claim
26 words
The automatic-ignition device recited in claim 1, wherein the primary igniting mixture housing structure has a small wall thickness in the area of the heat sink.
Claim 4
Dependent Claim
23 words
The automatic-ignition device recited in claim 1, wherein the heat sink comprises a material with higher heat conductivity than the gas generator housing.
Claim 5
Dependent Claim
20 words
The automatic-ignition device recited in claim 1, wherein the primary igniting mixture housing structure comprises a flange adjacent the window.
Claim 6
Dependent Claim
20 words
The automatic-ignition device recited in claim 1, wherein the primary igniting mixture housing structure comprises at least two form-fitted parts.
Claim 7
Dependent Claim
27 words
The automatic-ignition device recited in claim 1, wherein the primary igniting mixture housing structure is installed in the gas generator housing by a thermally insulating molded component.
Claim 8
Dependent Claim
13 words
The automatic-ignition device recited in claim 6, wherein the molded component comprises plastic.
Claim 9
Dependent Claim
23 words
The automatic-ignition device recited in claim 4, wherein an insulator of elastic material is arranged between the flange and the gas generator housing.
Claim 10
Dependent Claim
15 words
The automatic-ignition device recited in claim 8, wherein the insulator comprises an elastic sealing disk.
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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |