Patent US6334245B2 successfully refreshed from Google Patents.
US6334245B2
Expired / Lapsed
US
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Method of making gas generator for air bag and air bag system
Assignee: Daicel Corp
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Filing: 2001-05-15
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Granted: 2002-01-01
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Expires: 2021-05-15
Abstract
Abstract An air bag gas generator has a cylindrical member that permits reliable welding of the cylindrical member with an inner surface of a ceiling portion of a housing even if the welding surface is slightly misaligned. It furthermore permits welding in such a manner (a more stable manner) that unsteadiness does not occur in the area where the inner surface of the ceiling portion of the housing and the inner cylindrical member abuts. In the air bag gas generator, which includes the inner cylindrical member in the housing, the inner cylindrical member has a peripheral wall portion bent to form a flattened surface portion as an extension of the one of that cylindrical member where it joins the inner surface of the ceiling portion.
Inventors
- 👤 Nobuyuki Katsuda
- 👤 Shogo Tomiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:06
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B60R21/2644; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49405; Y10T29/49412; Y10T29/49826; Y10T29/49892; Y10T29/49895; Y10T29/49904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
219 words
A method of manufacturing an airbag gas generator including a housing having a diffuser shell provided with a gas discharge port, comprising; providing an inner cylindrical member having a peripheral wall, said inner cylindrical member having open ends; bending the peripheral wall at a portion adjacent to one of the open ends to form a flat surface that extends at an angle with respect to the peripheral wall; placing said inner cylindrical member onto an inner surface of the diffuser shell such that the flat surface is in contact with the inner surface; attaching said inner cylindrical member to an inner surface by welding said flat portion and the diffuser shell; providing a plate member around said inner cylindrical member, the plate member including a first circular portion defining a central hole and a circumferential wall portion formed at an outer edge of the first circular portion; positioning said plate member by engaging said central hole with at least one of the peripheral wall and an outer circumference of said flat portion; providing a cylindrical coolant member for at least one of cooling and filtering combustion gas generated when the gas generator operates; and positioning said cylindrical coolant member by engaging an inner circumferential surface of said cylindrical coolant member with an outer circumference of the circumferential wall portion.
Claim 2
Independent Claim
219 words
A method of manufacturing an airbag gas generator including a housing having a diffuser shell provided with a gas discharge port, comprising; providing an inner cylindrical member having a peripheral wall, said inner cylindrical member having open ends; bending the peripheral wall at a portion adjacent to one of the open ends to form a flat surface that extends at an angle with respect to the peripheral wall; placing said inner cylindrical member onto an inner surface of the diffuser shell such that the flat surface is in contact with the inner surface; attaching said inner cylindrical member to an inner surface by welding said flat portion and the diffuser shell; providing a plate member around said inner cylindrical member, the plate member including a first circular portion defining a central hole and a circumferential wall portion formed at an outer edge of the first circular portion; positioning said plate member by engaging said central hole with at least one of the peripheral wall and an outer circumference of said flat portion; providing a cylindrical coolant member for at least one of cooling and filtering combustion gas generated when the gas generator operates; and positioning said cylindrical coolant member by engaging an inner circumferential surface of said cylindrical coolant member with an outer circumference of the circumferential wall portion.
Claim 3
Dependent Claim
55 words
The method of manufacturing the gas generator of claim 1 , wherein the diffuser shell includes a second circular portion and said inner cylindrical member attaching step further includes the step of, attaching said inner cylindrical member such that a longitudinal axis of the inner cylindrical member matches a longitudinal axis of the diffuser shell.
Claim 4
Dependent Claim
37 words
The method of manufacturing the gas generator of claim 1 , wherein said inner cylindrical member attaching step further includes the step of, attaching said inner cylindrical member to the inner surface by an electron beam welding.
Claim 5
Dependent Claim
35 words
The method of manufacturing the gas generator of claim 1 , wherein said inner cylindrical member providing step further includes the step of, providing said inner cylindrical member formed by pressing a stainless steel plate.
Claim 6
Dependent Claim
40 words
The method of manufacturing the gas generator of claim 1 , wherein said attaching step further includes the step of, projecting a welding beam from an outside of the diffuser shell and using said flat surface as a welding area.
Claim 7
Dependent Claim
73 words
The method of manufacturing the gas generator of claim 1 , wherein said cylindrical coolant member has an upper end and an upper opening that oppose the inner surface, and said plate member providing step further includes the step of, providing said plate member in an upper portion of said cylindrical coolant member for closing the upper opening and preventing the combustion gas from by-passing between the upper end and the inner surface.
Claim 8
Dependent Claim
47 words
The method of manufacturing the gas generator of claim 1 , wherein said plate member providing step further includes the step of, providing said plate member for preventing, within said housing, a movement of said cylindrical coolant member in a radial direction with respect to the housing.
Claim 9
Dependent Claim
38 words
The method of manufacturing the gas generator of claim 1 , wherein said plate member providing step further includes the step of, providing said plate member including the first circular portion formed integrally with the circumferential wall portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-31 | 2005-07-02 | 2006-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-31 | 2009-07-02 | 2010-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-31 | 2013-07-02 | 2014-01-01 | $7700.00 | Window Closed / Lapsed |