Rifle handguard assembly having outer shell with outer and inner liners

  • US 4,663,875 A
  • Filed: 12/30/1985
  • Issued: 05/12/1987
  • Est. Priority Date: 12/30/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A handguard assembly for a rifle barrel comprising:

  • a generally cylindrical shell;

    a generally cylindrical outer liner mounted in the shell in spaced relationship thereto such that an outer annular volume is defined between the inner periphery of the shell and the outer liner;

    a generally cylindrical inner liner mounted in the shell in spaced relationship to the outer liner such that an intermediate annular volume is defined between the inner liner and the outer liner and an inner volume is defined by the inner liner;

    first means to permit cooling air to flow from outside of the shell to the outer annular volume and heated air to flow from the outer annular volume to outside of the shell;

    second means to permit air to flow from the outer annular volume to the intermediate annular volume and from the intermediate annular volume to the outer annular volume; and

    third means to permit air to flow from the intermediate annular volume to the inner volume and from the inner volume to the intermediate annular volume.

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