US12422234 - Integrated driving band obturator for artillery

The patent describes a projectile for artillery that features a multi-layered obturator and driving band, each composed of materials with varying hardness levels to enhance performance. This design aims to improve the sealing and aerodynamic properties of the projectile during firing.

Claim 1

1. 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. 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; 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 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 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.

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