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Metallic projectile body and thermoplastic rotating band

  • US 4,446,795 A
  • Filed: 12/31/1981
  • Issued: 05/08/1984
  • Est. Priority Date: 10/03/1980
  • Status: Expired due to Fees
First Claim
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1. A metallic projectile comprising:

  • a metallic projectile body having a band seat zone designated thereon;

    a sprayed metallic coating on said band seat zone, said coating being characterized by (i) having a relatively rough external surface, i.e., a large number of irregularly shaped projections comprising a maze of mechanical attachments to said body, (ii) being at least 0.003 inches thick so as to be metallurgically continuous, thereby to prevent oxidation of said body at said band seat zone thereof and (iii) being metallurgically bonded to said projectile body so as to have a metal-to-metal bond strength; and

    a polymer applied in liquid form around said zone and to said sprayed metallic coating to form, after hardening, a thermoplastic rotating band, said polymer, while in fluid form, permeating into intimate contact with said irregularly shaped projections so that, after said polymer becomes solid, a high torque transmittal interface is provided between said plastic rotating band and said projectile body.

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