Muzzle loading rifle with breech plug having gas seal facility

  • US 7,954,269 B2
  • Filed: 09/16/2010
  • Issued: 06/07/2011
  • Est. Priority Date: 01/17/2006
  • Status: Active Grant
First Claim
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1. A muzzle loading firearm, comprising:

  • a barrel having a muzzle end and a longitudinal bore extending rearward from said muzzle end to a rear barrel portion with a breech plug chamber, said breech plug chamber having a rear end and an opposing forward end, an internally threaded engagement portion adjacent said rear end and an initial portion forward from said internally threaded engagement portion; and

    a breech plug having a one-piece, integral body with an outer peripheral surface and adapted to be received in said breech plug chamber, said breech plug body having a nose facing said longitudinal bore, a breech end opposite said nose, a cup element adjacent said nose and a threaded engagement portion adjacent said breech end, said threaded engagement portion engaging said internally threaded engagement portion of said breech plug chamber, said cup element being a deformable seal element in the shape of a circular wall, said deformable seal element being compressed from a first position having a first outside diameter to a second position having a second outside diameter when said breech plug is secured in said breech plug chamber, said second outside diameter being less than said first outside diameter and substantially coextensive with a diameter of said initial portion, to thereby form a gas seal to prevent fouling of said threaded engagement portion during firing.

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