Patent ID: 7954414
Filing Date: 2011-06-07
Classification: F41A,Y10T

Abstract:
1. A muzzle brake for a firearm having a barrel with a muzzle extending along a longitudinal axis, the muzzle brake comprising: a generally cylindrical body adapted for attachment to the muzzle, said body including an axial passageway forwardly of and communicating with the muzzle when attached thereto; a first chamber in said body extending along said axial passageway for receiving combustion gases from the muzzle resulting from firing of the firearm; wherein the first chamber comprises a first port and a second port adapted to vent a portion of the combustion gases to counter muzzle lift and sideward movement resulting from the firing of the firearm, the first and second ports having respective first and second openings which are disposed generally on a top surface of the muzzle brake and on opposite sides of a longitudinal top relative to the longitudinal axis, the first opening having a different diameter and/or a different transverse offset from the longitudinal top relative to a respective diameter and transverse offset of the second opening; a second chamber in said body extending along said axial passageway forwardly of said first chamber for receiving at least a first portion of the combustion gases from said first chamber, said second chamber including a rear wall and a forward wall for deflecting at least a portion of the combustion gases in said second chamber, the rear wall and the forward wall being transverse and generally orthogonal to the longitudinal axis; wherein said second chamber includes two opposing side openings in said body between said rear wall and said forward wall for laterally venting at least a second portion of the combustion gases from said second chamber, wherein the forward wall is narrower than the rear wall in a lateral direction so that at least a portion of the combustion gases in the second chamber is deflected in the second chamber off the forward wall to the rear wall and further a portion of the combustion gases in the second chamber is deflected in a longitudinal forward direction laterally outward from the rear wall and past a lateral outward edge of the forward wall; a third chamber in said body extending along said axial passageway forwardly of said second chamber for receiving at least a third portion of the combustion gases from said second chamber, said third chamber including a forward wall for deflecting combustion gases in said third chamber, the forward wall of the third chamber being transverse and generally orthogonal to the longitudinal axis; and wherein said third chamber includes two opposing side openings in said body between said forward wall of said second chamber and said forward wall of said third chamber for laterally venting at least a portion of the combustion gases from said third chamber, said forward wall of said third chamber disposed to deflect a portion of the combustion gases in the third chamber to the forward wall of the second chamber which is disposed to deflect the portion of the combustion gases in the third chamber in a longitudinal forward direction laterally outward and past a lateral outward edge of the forward wall of the third chamber, and wherein said forward wall of said third chamber is truncated along said side openings of said third chamber and is narrower in a lateral direction than the forward wall of the second chamber.