US4669212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun barrel for use at high temperature
Assignee: General Dynamics OTS Inc
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Filing: 1984-10-29
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Granted: 1987-06-02
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Expires: 2004-10-29
Abstract
Abstract The present invention provides a gun capable of operating at relatively higher temperatures. The barrel of the gun is made up of at least two layers. The inner layer is of a refractory material which may be a metal refractory or a non-metal refractory. The liner is bonded to an outer jacket material formed of an alloy of nickel, aluminum and molybdenum. The coefficient of expansion of the liner and of the jacket are relatively low so that the gun does not expand extensively when heated by intensive use. The jacket metal is of higher strength at elevated temperature than is the conventional gun barrel steel.
Inventors
- 👤 Melvin R. Jackson
- 👤 Paul A. Siemers
- 👤 David P. Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:23
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; F; F41; F41A; F41A21/00; F41A21/02; F41A21/04; F41A21/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
A gun having a barrel lined with a plamsa deposited refractory material, and having a structural body of an alloy of nickel, aluminum and molybdenum bonded plasma deposited and bonded to the outer surface of the refractory liner and providing a supporting jacket of the barrel, said alloy containing a quantity of aluminum and molybdenum corresponding to a value falling within curve I of FIG. 5, the balance being nickel, and said alloy having a 0.2% yield strength in excess of 140 ksi at temperatures up to 1200° F.
Claim 2
Dependent Claim
89 words
A gun having a barrel lined with a plamsa deposited refractory material, and having a structural body of an alloy of nickel, aluminum and molybdenum bonded plasma deposited and bonded to the outer surface of the refractory liner and providing a supporting jacket of the barrel, said alloy containing a quantity of aluminum and molybdenum corresponding to a value falling within curve I of FIG. 5, the balance being nickel, and said alloy having a 0.2% yield strength in excess of 140 ksi at temperatures up to 1200° F.
Claim 3
Dependent Claim
14 words
The gun of claim 1 in which the refractory material is a refractory metal.
Claim 4
Dependent Claim
26 words
The gun of claim 1 in which the refractory material is at least one refractory metal selected from the group consisting of tungsten, tantalum and molybdenum.
Claim 5
Dependent Claim
19 words
The gun of claim 1 in which the refractory material is composed of a boride of a refractory metal.
Claim 6
Dependent Claim
17 words
The gun of claim 1 in which the refractory material is a carbide of a refractory metal.
Claim 7
Dependent Claim
14 words
The gun of claim 1 in which the refractory material is a refractory oxide.
Claim 8
Dependent Claim
19 words
The gun of claim 1 in which the refractory material is a tantalum alloy containing 10 weight percent tungsten.
Claim 9
Dependent Claim
24 words
The gun of claim 1 in which the refractory material is a tantalum alloy containin 8 weight percent tungsten and two weight percent hafnium.
Claim 10
Dependent Claim
16 words
The gun of claim 1 in which the liner is of a columbium base alloy C-129Y.
Claim 11
Dependent Claim
20 words
The gun of claim 1 in which the liner is of a molybdenum base alloy containing titanium, zirconium and molybdenum.
Claim 12
Dependent Claim
26 words
The gun of claim 1 in which the liner is of at least one refractory compound selected from the group consisting of carbides, oxides and borides.
Claim 13
Dependent Claim
37 words
The gun of claim 1 in which the structural body is of an alloy containing a quantity of aluminum and molybdenum corresponding to a value falling within curve II of FIG. 5 and the balance of nickel.
Claim 14
Dependent Claim
25 words
The gun of claim 1 in which the structural body is an alloy of nickel containing 6.4 weight percent aluminum and 24.2 weight percent molybdenum.
Claim 15
Independent Claim
99 words
The method of forming a gun barrel having a rifled bore and capable of high rates of fire at high energy which comprises, providing a mandrel conforming to the bore of the barrel, low pressure plasma depositing on said mandrel a liner of refractory material, low pressure plasma depositing on said refractory liner a barrel jacket of an alloy of nickel, aluminum and molybdenum, said alloy having a composition falling within the area enclosed by curve I of FIG. 5, and said alloy having a 0.2% yield strength in excess of 140 ksi at temperatures up to 1200° F.
Claim 16
Independent Claim
99 words
The method of forming a gun barrel having a rifled bore and capable of high rates of fire at high energy which comprises, providing a mandrel conforming to the bore of the barrel, low pressure plasma depositing on said mandrel a liner of refractory material, low pressure plasma depositing on said refractory liner a barrel jacket of an alloy of nickel, aluminum and molybdenum, said alloy having a composition falling within the area enclosed by curve I of FIG. 5, and said alloy having a 0.2% yield strength in excess of 140 ksi at temperatures up to 1200° F.
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |