US5975569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treated combustion chamber housing and process for making same
Assignee: Illinois Tool Works Inc
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Filing: 1997-11-03
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Granted: 1999-11-02
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Expires: 2017-11-03
Abstract
Abstract A combustion chamber housing for use in an airbag deployment system has a tubular body portion having a length and defining a combustion chamber that is adapted to contain combustion materials and to contain gases produced from the combustion thereof. The body has an expanded region having an edge defining an opening. The edge and a portion of the body adjacent to the edge and extending longitudinally therefrom along the body is heat-treated and defines a heat-treated, strengthened region. A method for heat treating the housings is also disclosed.
Inventors
- 👤 Michael Starozhitsky
- 👤 Edward Kawecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:13
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B60R21/2644; B21; B21D; B21D53/00; B23; B23P; B23P15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49622; Y10T29/49995; Y10T29/49996
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A combustion chamber housing for use in an airbag deployment system, comprising a tubular body portion having a length and having a longitudinal axis, the body portion being formed from carbon steel and defining a combustion chamber adapted to contain combustion materials and to contain gases produced by combustion thereof, the body having a first expanded region having an edge defining an opening, the edge and a portion of the body adjacent to the edge and extending longitudinally along the body being heat-treated and defining a heat-treated, strengthened region, the body having a substantially constant wall thickness throughout.
Claim 2
Dependent Claim
98 words
A combustion chamber housing for use in an airbag deployment system, comprising a tubular body portion having a length and having a longitudinal axis, the body portion being formed from carbon steel and defining a combustion chamber adapted to contain combustion materials and to contain gases produced by combustion thereof, the body having a first expanded region having an edge defining an opening, the edge and a portion of the body adjacent to the edge and extending longitudinally along the body being heat-treated and defining a heat-treated, strengthened region, the body having a substantially constant wall thickness throughout.
Claim 3
Dependent Claim
45 words
The combustion chamber housing in accordance with claim 1 wherein the body portion includes a plurality of expanding regions, and wherein a largest of the expanding regions defines the first expanded region, and wherein the heat-treated, strengthened region is coextensive with the first expanded region.
Claim 4
Dependent Claim
37 words
The combustion chamber housing in accordance with claim 2 wherein the heat-treated, strengthened region extends longitudinally along the body from the edge, and has a length that is smaller than a length of the first expanded region.
Claim 5
Dependent Claim
26 words
The combustion chamber housing in accordance with claim 1 wherein the heat-treated, strengthened region extends less than about 1/3 of the length of the body portion.
Claim 6
Dependent Claim
19 words
The combustion chamber housing in accordance with claim 1 wherein the heat-treated, strengthened region is formed by heat induction.
Claim 7
Dependent Claim
25 words
The combustion chamber housing in accordance with claim 1 wherein the body portion includes at least one gas discharge opening therein spaced from the edge.
Claim 8
Dependent Claim
23 words
The combustion chamber housing in accordance with claim 1 wherein the carbon steel has an AISI designation of about AISI 1005 to 1015.
References Cited (Backward Citations)
US4938501A
Cited
US5197756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-01 | 2003-05-03 | 2003-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-01 | 2007-05-03 | 2007-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-01 | 2011-05-03 | 2011-11-02 | $7700.00 | Window Closed / Lapsed |