Patent US4649701A successfully refreshed from Google Patents.
US4649701A
Expired / Lapsed
US
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Thrust nozzle with insulation
Assignee: United States Department of the Navy
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Filing: 1986-02-11
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Granted: 1987-03-17
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Expires: 2006-02-11
Abstract
Abstract A thrust nozzle of the hollow-cone type affixed to a stationary shell having external insulation on the nozzle and the shell and the nozzle having a liner extending beyond its edge and having insulation over the extended portion.
Inventors
- 👤 Gary M. Wendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/80; F02K9/84; F02K9/97
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
In a rocket thrust nozzle that includes a hollow divergent exit cone shell affixed to a stationary shell by means of a flexible seal, the improvement comprising external insulation adjacent to the external sides of said cone shell and said stationary shell, exit cone insulation adjacent to the internal side of said cone shell, an exit cone liner adjacent to and extending beyond said exit cone insulation and liner external insulation adjacent to said extended portion of said liner.
Claim 2
Dependent Claim
79 words
In a rocket thrust nozzle that includes a hollow divergent exit cone shell affixed to a stationary shell by means of a flexible seal, the improvement comprising external insulation adjacent to the external sides of said cone shell and said stationary shell, exit cone insulation adjacent to the internal side of said cone shell, an exit cone liner adjacent to and extending beyond said exit cone insulation and liner external insulation adjacent to said extended portion of said liner.
Claim 3
Dependent Claim
11 words
The nozzle of claim 1 wherein said external insulation is cork.
Claim 4
Dependent Claim
15 words
The nozzle of claim 1 wherein said exit cone insulation is low density silica/phenolic tape.
Claim 5
Dependent Claim
13 words
The nozzle of claim 1 wherein said liner external insulation is graphite felt.
Claim 6
Dependent Claim
22 words
The nozzle of claim 1 which further comprises an air gap positioned between said exit cone liner and said exit cone insulation.
Claim 7
Dependent Claim
12 words
The nozzle of claim 1 wherein said exit cone liner is carbon-carbon.
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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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |