Patent US4478151A successfully refreshed from Google Patents.
US4478151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel penetrator
Assignee: United States Department of the Navy
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Filing: 1983-02-28
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Granted: 1984-10-23
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Expires: 2003-02-28
Abstract
Abstract Positive rocket motor pressure hull venting in the case of deck fires is vided by placement of thermite masses at spaced locations on the interior of the hull. Small cylindrical masses as well as strip formed masses are employed. The thermite mass includes a small amount of structurally formed aluminum as well as the conventional powdered aluminum.
Inventors
- 👤 Ronald F. Vetter
- 👤 Howard W. Gerrish, Jr.
- 👤 Lawrence F. Lesniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:33
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/38; F42; F42B; F42B39/00; F42B39/20; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/114
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
81 words
A pressure hull penetrator for rocket motors comprising: a rocket motor have a pressure hull with inner and outer surfaces; a mass of thermite material having a predetermined shape to conform to a selected area of the inner surface of said rocket motor pressure hull; an igniter compound in contact with said mass of thermite material and said inner surface; and a layer of insulating material overlying said mass of thermite material, said igniter mix, and adhering to said inner surface.
Claim 2
Dependent Claim
81 words
A pressure hull penetrator for rocket motors comprising: a rocket motor have a pressure hull with inner and outer surfaces; a mass of thermite material having a predetermined shape to conform to a selected area of the inner surface of said rocket motor pressure hull; an igniter compound in contact with said mass of thermite material and said inner surface; and a layer of insulating material overlying said mass of thermite material, said igniter mix, and adhering to said inner surface.
Claim 3
Dependent Claim
18 words
A pressure hull penetrator according to claim 1 wherein said mass of thermite material is of cylindrical shape.
Claim 4
Dependent Claim
26 words
A pressure hull penetrator according to claim 2 where said mass of thermite material has a cylindrical base adjacent the inner surface of said pressure hull.
Claim 5
Dependent Claim
17 words
A pressure hull penetrator according to claim 1 wherein said mass of thermite material is strip shaped.
Claim 6
Dependent Claim
23 words
A pressure hull penetrator according to claim 1 wherein said igniter mix is contained in a void within said mass of thermite material.
Claim 7
Dependent Claim
21 words
A pressure hull penetrator according to claim 3 wherein said igniter mix is contained within a void within said cylindrical base.
Claim 8
Dependent Claim
34 words
A pressure hull penetrator according to claim 1 wherein said igniter mix is located adjacent to said mass of thermite material in physical contact therewith and with said inner surface of said pressure hull.
Claim 9
Dependent Claim
35 words
A pressure hull penetrator according to claim 3 wherein said igniter mix is located adjacent the cylindrical base of said thermite mass in physical contact therewith and with said inner surface of said pressure hull.
Claim 10
Dependent Claim
29 words
A pressure hull penetrator according to claim 4 wherein said igniter mix is located adjacent said strip in contact therewith and with said inner surface of said pressure hull.
Claim 11
Dependent Claim
29 words
A pressure hull penetrator according to claim 1 wherein said thermite mix consists essentially of: 75% Fe 2 O 3 20% of Al powder 5% of structurally formed Al.
Claim 12
Dependent Claim
29 words
A pressure hull penetrator according to claim 3 wherein said thermite mix consists essentially of: 75% Fe 2 O 3 20% of Al powder 5% of structurally formed Al.
Claim 13
Dependent Claim
29 words
A pressure hull penetrator according to claim 4 wherein said thermite mix consists essentially of: 75% Fe 2 O 3 20% of Al powder 5% of structurally formed Al.
Claim 14
Dependent Claim
104 words
A pressure hull penetrator for rocket motor comprising: a rocket motor having a pressure hull having inner and outer surfaces; a plurality of thermite measses positioned within said pressure hull at predetermined locations adjacent said inner surface thereof and in physical contact therewith; a plurality of masses of igniter mix positioned in contact with the inner surface of said pressure hull and located in a predetermined pattern spaced about and in contact with said plurality of thermite masses; and a layer of insulating material bonded to said inner surface of said pressure hull and overlying said masses of igniter mix and said thermite mix.
Claim 15
Dependent Claim
104 words
A pressure hull penetrator for rocket motor comprising: a rocket motor having a pressure hull having inner and outer surfaces; a plurality of thermite measses positioned within said pressure hull at predetermined locations adjacent said inner surface thereof and in physical contact therewith; a plurality of masses of igniter mix positioned in contact with the inner surface of said pressure hull and located in a predetermined pattern spaced about and in contact with said plurality of thermite masses; and a layer of insulating material bonded to said inner surface of said pressure hull and overlying said masses of igniter mix and said thermite mix.
Claim 16
Dependent Claim
29 words
A pressure hull penetrator according to claim 13 wherein said thermite max consists essentially of: 75% Fe 2 O 3 20% of Al powder 5% of structurally formed Al.
Claim 17
Dependent Claim
18 words
A pressure hull penetrator according to claim 13 wherein said masses of thermite material is of cylindrical shape.
Claim 18
Dependent Claim
18 words
A pressure hull penetrator according to claim 14 wherein said masses of thermite material is of cylindrical shape.
Claim 19
Dependent Claim
17 words
A pressure hull penetrator according to claim 13 wherein said masses of thermite material is strip shaped.
Claim 20
Dependent Claim
17 words
A pressure hull penetrator according to claim 14 wherein said masses of thermite material is strip shaped.
References Cited (Backward Citations)
US3903803A
Cited
US3357356A
Cited
US3325316A
Cited
US3297503A
Cited
US3649390A
Cited
US3695951A
Cited
US3754496A
Cited
US3752078A
Cited
US4405104A
Cited
US4208226A
Cited
US4330346A
Cited
US4410470A
Cited
US4411199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |