US4084781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of ablator liners in combustors
Assignee: United States Department of the Navy
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Filing: 1977-03-28
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Granted: 1978-04-18
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Expires: 1997-03-28
Abstract
Abstract A fluid polymeric ablator liner is cast onto the inner surface of a ramjetombustion 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
2026-11-05 11:32
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A mold fixture adapted to be assembled inside a combustion chamber, said combustion chamber having a cylindrical shape, a domed end, and an end containing a nozzle, comprising: a domed surface conforming to said domed end and a nozzle-conforming surface conforming to said end containing a nozzle, said domed surface being assembled inside said combustion chamber from at least two parts; a rear wall attached to said domed surface so as to form a cavity therebetween, said rear wall containing openings to allow steam into and out of said cavity; a surface conforming to said combustion chamber end containing a nozzle, said surface being assembled inside said nozzle from at least two parts; said surface further defining an enclosure into which steam is delivered through said nozzle; and means for positioning said nozzle-conforming surface and said domed surface in a fixed position inside said combustion chamber.
Claim 2
Dependent Claim
146 words
A mold fixture adapted to be assembled inside a combustion chamber, said combustion chamber having a cylindrical shape, a domed end, and an end containing a nozzle, comprising: a domed surface conforming to said domed end and a nozzle-conforming surface conforming to said end containing a nozzle, said domed surface being assembled inside said combustion chamber from at least two parts; a rear wall attached to said domed surface so as to form a cavity therebetween, said rear wall containing openings to allow steam into and out of said cavity; a surface conforming to said combustion chamber end containing a nozzle, said surface being assembled inside said nozzle from at least two parts; said surface further defining an enclosure into which steam is delivered through said nozzle; and means for positioning said nozzle-conforming surface and said domed surface in a fixed position inside said combustion chamber.
Claim 3
Dependent Claim
52 words
The mold fixture of claim 1 wherein said positioning means comprises a hollow rod adjustably attached to said rear wall on the domed surface and attached to said nozzle conforming surface, and said positioning means further comprising a flange on said nozzle conforming surface attached to an outer lip on said nozzle.
Claim 4
Dependent Claim
68 words
The mold fixture of claim 1 wherein said rear wall extends beyond said domed surface to abut said combustion chamber, thereby forming a cavity between said domed surface and said domed end; and said enclosure at said nozzle end forms a narrow ring of contact with said combustion chamber so as to form a cavity bounded by the ring of contact, the nozzle conforming surface, and the flange.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |