US4031605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating combustion chamber liners
Assignee: United States Department of the Navy
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Filing: 1976-08-05
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Granted: 1977-06-28
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Expires: 1996-08-05
Abstract
Abstract A fluid polymeric ablator liner is cast onto the inner surface of a ramjet combustion chamber which has been prepared with a screen liner substrate. A split mold is inserted through the nozzle and assembled inside the chamber allowing a thin layer of ablator to be cast and cured on the dome and nozzle regions of the combustion chamber.
Inventors
- 👤 Harold Thompson Couch
- 👤 Leonard Selwyn Cohen
- 👤 Lawrence Joseph Coulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:28
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
In a combustion chamber having a nozzle, an inner surface, an outer surface, and at least one domed region, a method of fabricating a liner on the inner surface of said combustion chamber comprising the steps of: (a) first attaching a wire mesh substrate screen to said inner surface of said combustion chamber so as to cover at least the domed region and the nozzle; (b) forming a cavity between said domed region and a parallel domed surface of a mold fixture assembled inside said combustion chamber; (c) forming a cavity between said nozzle and a mold fixture assembled inside said nozzle to form a surface parallel to said nozzle; (d) injecting a fluid curable polymeric material into said cavity between said domed surface and said domed region and into said cavity between said nozzle and said surface parallel to said nozzle; and (e) curing said fluid polymeric material into a firm solid affixed to said substrate screen.
Claim 2
Dependent Claim
158 words
In a combustion chamber having a nozzle, an inner surface, an outer surface, and at least one domed region, a method of fabricating a liner on the inner surface of said combustion chamber comprising the steps of: (a) first attaching a wire mesh substrate screen to said inner surface of said combustion chamber so as to cover at least the domed region and the nozzle; (b) forming a cavity between said domed region and a parallel domed surface of a mold fixture assembled inside said combustion chamber; (c) forming a cavity between said nozzle and a mold fixture assembled inside said nozzle to form a surface parallel to said nozzle; (d) injecting a fluid curable polymeric material into said cavity between said domed surface and said domed region and into said cavity between said nozzle and said surface parallel to said nozzle; and (e) curing said fluid polymeric material into a firm solid affixed to said substrate screen.
Claim 3
Dependent Claim
34 words
The process of claim 1 further comprising the step of applying the fluid curable polymeric material to a cylindrical portion of said inner surface while said cylindrical portion is spinning about its major axis.
Claim 4
Dependent Claim
36 words
The process of claim 1 wherein said curing is facilitated by injecting steam into said mold fixtures of step (b) and of step (c) of claim 1 whereby said fluid polymeric material is heated during curing.
Claim 5
Dependent Claim
25 words
The process of claim 3 wherein the injecting of said fluid polymeric material is accompanied by evacuating the cavities into which said fluid is injected.
Claim 6
Dependent Claim
17 words
The process of claim 4 wherein said fluid polymeric material is a silicone based elastomeric ablator material.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |