Patent US4870884A successfully refreshed from Google Patents.
US4870884A
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Incendiary projectile, method of introducing the incendiary composition into the projectile and arrangement for implementing the method
Assignee: Diehl Verwaltungs Stiftung
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Filing: 1988-07-15
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Granted: 1989-10-03
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Expires: 2008-07-15
Abstract
Abstract An incendiary projectile possessing an incendiary composition arranged locally bonded about the internal casing surface of the projectile wall structure. The projectile has the inner casing surface of its wall structure covered with the incendiary composition in fixed adherence therewith, and the explosive in the inner space of the projectile extends into grid-structured interspaces or scorings for the mutual bounding of covered regions. In this connection, there is also disclosed a particularly advantageous method for the formation of a projectile which is designed in this manner, as well as an expediently employable arrangement for the implementation of the method.
Inventors
- 👤 Rudolf Schubart
- 👤 Wolfgang Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:12
CPC Classifications
F; F42; F42B; F42B33/00; F42B33/02; F42B33/0207; F42B12/00; F42B12/02; F42B12/20; F42B12/22; F42B12/24; F42B12/36; F42B12/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
A method for the production of a projectile having a structured coating of an incendiary composition on its inner mantle surface, said projectile having an explosive material filler for defined fragmentation disintegration of its wall structure; said explosive material filler extending to said structured coating; said coating defining a grid-shaped channel structure; said method comprising the steps of: introducing a segmented matrix into the projectile which defines recesses; introducing a removable auxiliary material to fill said recesses of said matrix and adhere to said inner mantle surface of said projectile; removing said matrix from said auxiliary material structure to expose said mantle not coated by said auxiliary material; coating said mantle surface exposed upon removal of said matrix with said incendiary composition by a centrifugal casting process, such that incendiary composition is divided into regions throughout the structure; removing the auxiliary material structure; and filling said projectile with said explosive material filler; such that said explosive material filler contacts and adheres to said inner mantle exposed upon removal of said auxiliary material.
Claim 2
Independent Claim
172 words
A method for the production of a projectile having a structured coating of an incendiary composition on its inner mantle surface, said projectile having an explosive material filler for defined fragmentation disintegration of its wall structure; said explosive material filler extending to said structured coating; said coating defining a grid-shaped channel structure; said method comprising the steps of: introducing a segmented matrix into the projectile which defines recesses; introducing a removable auxiliary material to fill said recesses of said matrix and adhere to said inner mantle surface of said projectile; removing said matrix from said auxiliary material structure to expose said mantle not coated by said auxiliary material; coating said mantle surface exposed upon removal of said matrix with said incendiary composition by a centrifugal casting process, such that incendiary composition is divided into regions throughout the structure; removing the auxiliary material structure; and filling said projectile with said explosive material filler; such that said explosive material filler contacts and adheres to said inner mantle exposed upon removal of said auxiliary material.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1, wherein the auxiliary material is introduced by an axially-parallel divided, diametrically variable matrix having a grooved passageway structure along its outer surface.
Claim 4
Dependent Claim
54 words
A method as claimed in claim 1, further including the steps of introducing an expendable matrix into the interior of the projectile, said matrix including radially adjustable segments, wherein the outer jacket of said matrix has a grid-shaped passageway structure formed thereon which conforms with the shape of said coating of said incendiary composition.
Claim 5
Dependent Claim
41 words
A method as claimed in claim 1 wherein said incendiary composition covering is arranged in locally bounded regions along the inner casing surface of the projectile wall; and wherein the incendiary composition adheres to said inner casing surface of the wall.
Claim 6
Dependent Claim
28 words
A method as claimed in claim 4, wherein an explosive material in the interior of the projectile extends into grid-structured innerspaces formed upon removal of said auxiliary material.
Claim 7
Dependent Claim
37 words
A method as claimed in claim 1, wherein said auxiliary material on the inner casing surface of the wall which is to be subsequently filled with an explosive, is formed from a curable and thereafter removable material.
Claim 8
Dependent Claim
18 words
A method as claimed in claim 1, wherein said incendiary composition is active and comprises a reduction medium.
Claim 9
Dependent Claim
15 words
A method as claimed in claim 7, wherein said incendiary composition comprises a pyrophoric material.
Claim 10
Dependent Claim
17 words
A method as claimed in claim 7, wherein said incendiary composition comprises a zirconium or titanium alloy.
Claim 11
Dependent Claim
15 words
A method as claimed in claim 7, wherein said incendiary composition comprises a misch metal.
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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) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |