US4886293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas producer for filling a gas cushion restraining device
Assignee: Daimler Benz AG
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Filing: 1988-12-28
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Granted: 1989-12-12
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Expires: 2008-12-28
Abstract
Abstract A gas producer is disclosed for filling a gas cushion restraining device for occupants of vehicles. The gas producer includes a combustion chamber filled with fuel and surrounded by a wall which exhibits apertures for the discharge of the gas produced, said apertures being sealed hermetically by a destructible cover at the start of the burning process of the fuel up to a specific pressure rise in the combustion chamber. In order to obtain a planned pressure rise irrespective of the initial temperature of the gas producer, it is provided according to the invention that the total cross-sectional area of the discharge apertures is automatically enlargeable as a function of the rising combustion chamber pressure.
Inventors
- 👤 Werner Weiler
- 👤 Helmut Patzelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:56
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B60R21/2644; B01; B01J; B01J7/00; B60R2021/26094
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
Gas producer for filling a gas cushion restraining device for occupants of vehicles, having a combustion chamber filled with fuel and surrounded by a wall which exhibits apertures for the discharge of the gas produced, said apertures being sealed hermetically by a destructible cover at the start of the burning process of the fuel up to a specific pressure rise in the combustion chamber, wherein the total cross-sectional area of the discharge apertures is automatically enlargeable as a function of the rising combustion chamber pressure.
Claim 2
Dependent Claim
85 words
Gas producer for filling a gas cushion restraining device for occupants of vehicles, having a combustion chamber filled with fuel and surrounded by a wall which exhibits apertures for the discharge of the gas produced, said apertures being sealed hermetically by a destructible cover at the start of the burning process of the fuel up to a specific pressure rise in the combustion chamber, wherein the total cross-sectional area of the discharge apertures is automatically enlargeable as a function of the rising combustion chamber pressure.
Claim 3
Dependent Claim
43 words
Gas producer according to claim 1, wherein the wall of the combustion chamber exhibits apertures of different diameters, and wherein, in the design state of the producer, said apertures are sealed by a tear-open foil cover arranged on the inside of the wall.
Claim 4
Dependent Claim
20 words
Gas producer according to claim 2, wherein the cover is formed by a sheet metal strip placed against the wall.
Claim 5
Dependent Claim
24 words
Gas producer according to claim 1, wherein the apertures in the wall exhibit equal diameters and wherein annular fuses are inserted into said apertures.
Claim 6
Dependent Claim
53 words
Gas producer according to claim 1, wherein a tear-open cover arranged on the inside of the wall of the combustion chamber exhibits a central region destructible at relatively low pressure and of smaller size than the associated wall aperture, and wherein radial breaking lines destructible at higher pressure start from this central region.
Claim 7
Dependent Claim
68 words
Gas producer according to claim 1, wherein a tear-open cover arranged on the inside of the wall of the combustion chamber exhibits a central punched hole region of smaller size than the associated wall aperture, wherein radial breaking lines or punched parting lines destructible at higher pressure start from said central hole region, and wherein the hole region is covered by a separate foil in the initial state.
Claim 8
Dependent Claim
29 words
Gas producer according to claim 1, wherein the apertures are covered on the outside of the wall by a bimetallic spring which clears the passage progressively with rising temperature.
Claim 9
Dependent Claim
20 words
Gas producer according to claim 1, wherein the tear-open cover exhibits different wall thicknesses in the region of different apertures.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |