Patent US4747225A successfully refreshed from Google Patents.
US4747225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weapon barrel with metallorgically bonded wear resistant liner
Assignee: Vereinigte Edelstahlwerke AG
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Filing: 1983-12-14
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Granted: 1988-05-31
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Expires: 2003-12-14
Abstract
Abstract The weapon barrel comprises a liner and at least one jacket tube. The liner is made of a highly wear-resistant material, like a cobalt or nickel base alloy, and the jacket tube is made of a tough alloy, like steel. In the manufacturing process the liner material is packed into the jacket tube in the form of a powdery material which may be pre-pressed or pre-sintered. The packing is arranged such as to leave a central free space in the jacket tube, and the jacket tube may be surrounded by an encapsulating tube. The jacket tube or the encapsulating tube is closed either before or after evacuation, and the closed tube arrangement is subjected to a combined heat and pressure treatment at temperatures of at least 900° C., but below the melting point of the relevant materials and at pressures of at least 900 bar. The compound body thus obtained is formed with a full-area metallic bond between the liner and the jacket tube. After eventual heat treatment the compound body is further machined and a rifling is worked thereinto as, for example, by forging.
Inventors
- 👤 Manfred Gstettner
- 👤 Bruno Hribernik
- 👤 Alexander Kohnhauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:06
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; B22F7/00; B22F7/06; B22F7/062; B22F7/08; F; F41; F41A; F41A21/00; F41A21/02; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
163 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed, and mechanically working said compound body to form said weapon barrel.
Claim 2
Dependent Claim
163 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed, and mechanically working said compound body to form said weapon barrel.
Claim 3
Dependent Claim
180 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing being metallurgically bonded to said encasing tube in the presence of a protective gas atmosphere.
Claim 4
Dependent Claim
180 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing being metallurgically bonded to said encasing tube in the presence of a protective gas atmosphere.
Claim 5
Dependent Claim
204 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state.
Claim 6
Dependent Claim
204 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state.
Claim 7
Dependent Claim
213 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-pressed.
Claim 8
Dependent Claim
213 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-pressed.
Claim 9
Dependent Claim
213 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-sintered.
Claim 10
Dependent Claim
213 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-sintered.
Claim 11
Dependent Claim
215 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-pressed and pre-sintered.
Claim 12
Dependent Claim
215 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing being formed from a powdery material having a bulk density measured in mass per unit volume of the powdery material and amounting to at least 60% of the density of said powdery material when in the non-powdery solid state; and said powdery material for forming said packing being pre-pressed and pre-sintered.
Claim 13
Dependent Claim
180 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing and said at least one jacket tube forming a compound body subjected to hot working.
Claim 14
Dependent Claim
180 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; and said packing and said at least one jacket tube forming a compound body subjected to hot working.
Claim 15
Dependent Claim
197 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of a different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to forging.
Claim 16
Dependent Claim
197 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of a different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to forging.
Claim 17
Dependent Claim
207 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to hot working to result in an at least 1.3-fold change in shape.
Claim 18
Dependent Claim
207 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to hot working to result in an at least 1.3-fold change in shape.
Claim 19
Dependent Claim
207 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to hot working to result in an at least 2-fold change in shape.
Claim 20
Dependent Claim
207 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and said packing and said at least one jacket tube forming a compound body subjected to hot working to result in an at least 2-fold change in shape.
Claim 21
Dependent Claim
187 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and a rifling machined into said compound body.
Claim 22
Dependent Claim
187 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube a packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; and a rifling machined into said compound body.
Claim 23
Dependent Claim
197 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube as packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; a rifling machined into said compound body; and said rifling being machined into said compound body by forging.
Claim 24
Dependent Claim
197 words
A weapon barrel comprising a liner and at least one jacket tube, the liner and the at least one jacket tube being made of different metallic materials, said weapon barrel being produced by the method comprising the steps of: providing an encasing tube defining the jacket tube and having two ends and made of a tough alloy; placing into said encasing tube as packing of a highly wear-resistant, powdery material for forming the liner; closing said encasing tube at said ends thereof and evacuating the same; heating said encasing tube after closing the same to a temperature of at least 900° C., but below the melting points of said encasing tube and said packing and simultaneously subjecting said closed encasing tube to a pressure of at least 900 bar to form a compound body with a substantially full-area metallurgical bond between said encasing tube and the powdery material which has been compressed; mechanically working said compound body to form said weapon barrel; said packing and said at least one jacket tube forming a compound body subjected to hot working; a rifling machined into said compound body; and said rifling being machined into said compound body by forging.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |