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Stress modulator ring and microgrooved base for an ammunition cartridge having a plastic case

  • US 4,726,296 A
  • Filed: 04/22/1985
  • Issued: 02/23/1988
  • Est. Priority Date: 04/22/1985
  • Status: Expired due to Fees
First Claim
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1. An ammunition cartridge comprising:

  • (a) a cylindrical base having a plurality of grooves around the periphery thereof;

    (b) a cylindrical plastic member having a portion thereof disposed around said grooves in said base; and

    (c) a stress ring surrounding said plastic member in the area of said grooves to modulate the stress in said plastic, said grooves comprising means for relieving substantially all of the plastic member stress produced by said stress ring, whereby said plastic member is a stress relieved plastic member.

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