Integrated driving band obturator for artillery
AssigneeRaytheon Company
InventorFrederick B. Koehler
Life of this patent
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Abstract
A projectile that includes an artillery shell having a casing that defines a surface is provided. The projectile has an obturator that includes an obturator first material layer on the casing surface and an obturator second material layer on the obturator first material layer. The obturator also has an obturator third material layer on the obturator second material layer. The projectile also has a driving band that includes a driving band first material layer on the casing surface and a driving band second material layer on the driving band first material layer. Additionally, the projectile includes a driving band lead-in having a driving band lead-in first material layer on the casing surface and a driving band lead-in second material layer on the driving band lead-in first material layer.
Claims20
A projectile comprising:
- an artillery shell having a casing that defines a surface;
- an obturator disposed at the casing surface, the obturator including:
- an obturator first material layer disposed directly on the casing surface, the obturator first material layer being formed of a first material having a first hardness;
- an obturator second material layer disposed directly on the obturator first material layer, the obturator second material layer being formed of a second material having a second hardness that is less than the first hardness;
- and
- an obturator third material layer disposed directly on the obturator second material layer, the obturator third material layer being formed of a third material having a third hardness that is less than the second hardness;
- a driving band disposed on the casing layer abutting the obturator and forward the obturator, the driving band including:
- a driving band first material layer disposed directly on the casing surface and formed of the first material;
- and
- a driving band second material layer disposed directly on the driving band first material layer and formed of the second material;
- and
- a driving band lead-in disposed on the casing layer abutting the driving band and forward the driving band, the driving band lead-in including:
- a driving band lead-in first material layer disposed directly on the casing surface and formed of the first material;
- and
- a driving band lead-in second material layer disposed directly on the driving band lead-in first material layer and formed of the second material.
A method of forming a projectile having an artillery shell with a casing that defines a surface, the method comprising:
- depositing a first material having a first hardness directly on the casing surface to form an obturator first material layer;
- depositing the first material directly on the casing surface and abutting the obturator first material layer to form a driving band first material layer;
- depositing the first material directly on the casing surface abutting the driving band first material layer to form a driving band lead-in first material layer;
- depositing a second material having a second hardness that is less than the first hardness directly on the obturator first material layer to form an obturator second material layer;
- depositing the second material directly on the driving band first material layer to form a driving band second material layer where a portion of the driving band first material layer abuts the obturator first material layer and the obturator second material layer and a portion of the driving band second material layer abuts the obturator second material layer, wherein the driving band first material layer and the driving band second material layer form a driving band material profile;
- depositing the second material directly on the driving band lead-in first material layer to form a driving band lead-in second material layer, wherein the driving band lead-in first material layer and the driving band lead-in second material layer form a driving band lead-in material profile;
- and
- depositing a third material having a third hardness that is less than the second hardness directly on the obturator second material layer to form an obturator third material layer, wherein the obturator first material layer, the obturator second material layer, and the obturator third material layer form an obturator material profile where the driving band material profile is different from the obturator material profile and the driving band lead-in material profile is different from the driving band material profile and the obturator material profile.
A projectile comprising:
- an artillery shell having a casing that defines a surface;
- an obturator first material layer disposed directly on the casing surface;
- an obturator second material layer disposed directly on the obturator first material layer;
- an obturator third material layer disposed directly on the obturator second material layer;
- a driving band first material layer disposed directly on the casing surface;
- and
- a driving band second material layer disposed directly on the driving band first material layer;
- a driving band lead-in first material layer disposed directly on the casing surface;
- and
- a driving band lead-in second material layer disposed directly on the driving band lead-in first material layer.
Dependencies are inferred from the claim text.