Firearm sound suppressor

Abstract

A sound suppressor for a firearm includes a housing and an endcap. The housing has a proximal end and a distal end and defines a first central passage extending between the proximal end toward the distal end. The endcap is coupled to the housing. The endcap includes a parabolic-shaped inner surface defining a second central passage configured to fluidly communicate with the first central passage.

What is claimed is: 
     
         1 . A sound suppressor for a firearm, the sound suppressor comprising:
 a housing having a proximal end and a distal end and defining a first central passage extending between the proximal end toward and the distal end; and   an endcap coupled to the housing and including an inner surface defining a parabolic shape and a second central passage configured to fluidly communicate with the first central passage.   
     
     
         2 . The sound suppressor of  claim 1 , wherein the inner surface is concentrically disposed about a longitudinal axis and is concave in a plane extending parallel to the longitudinal axis. 
     
     
         3 . The sound suppressor of  claim 2 , wherein the inner surface is concave in a plane extending perpendicular to the longitudinal axis. 
     
     
         4 . The sound suppressor of  claim 1 , wherein the endcap includes a proximal end defining a first opening and a distal end defining a second opening. 
     
     
         5 . The sound suppressor of  claim 4 , wherein the inner surface is concentrically disposed about a longitudinal axis and proximate the distal end of the endcap the inner surface is planar in a plane extending parallel to the longitudinal axis. 
     
     
         6 . The sound suppressor of  claim 5 , wherein proximate the distal end of the endcap the inner surface is concave in a plane extending perpendicular to the longitudinal axis. 
     
     
         7 . The sound suppressor of  claim 4 , wherein proximate the proximal end of the endcap a portion of the inner surface defines a paraboloid, and proximate the distal end of the endcap a portion of the inner surface defines a cylinder. 
     
     
         8 . A sound suppressor for a firearm, the sound suppressor comprising:
 a housing having a proximal end and a distal end and defining a first central passage extending between the proximal end and the distal end; and   an endcap coupled to the housing and including an inner surface disposed about a longitudinal axis, the inner surface defining a concave shape in a plane extending parallel to the longitudinal axis, the inner surface further defining a second central passage configured to fluidly communicate with the first central passage.   
     
     
         9 . The sound suppressor of  claim 8 , wherein the inner surface is concentrically disposed about the longitudinal axis and is concave in a plane extending parallel to the longitudinal axis. 
     
     
         10 . The sound suppressor of  claim 9 , wherein the inner surface is concave in a plane extending perpendicular to the longitudinal axis. 
     
     
         11 . The sound suppressor of  claim 8 , wherein the endcap includes a proximal end defining a first opening and a distal end defining a second opening. 
     
     
         12 . The sound suppressor of  claim 11 , wherein the inner surface is concentrically disposed about a longitudinal axis and proximate the distal end of the endcap the inner surface is planar in the plane extending parallel to the longitudinal axis. 
     
     
         13 . The sound suppressor of  claim 12 , wherein proximate the distal end of the endcap the inner surface is concave in a plane extending perpendicular to the longitudinal axis. 
     
     
         14 . The sound suppressor of  claim 11 , wherein proximate the proximal end of the endcap a portion of the inner surface defines a paraboloid, and proximate the distal end of the endcap a portion of the inner surface defines a cylinder. 
     
     
         15 . A sound suppressor for a firearm, the sound suppressor comprising:
 a housing defining a first central chamber; and   an endcap coupled to the housing and having a proximal end and a distal end, the endcap further including an inner surface extending between the proximal end and the distal end and defining a second central passage configured to fluidly communicate with the first central chamber, the inner surface defining (i) a paraboloid proximate the proximal end of the endcap and (i) a cylinder proximate the distal end of the endcap.   
     
     
         16 . The sound suppressor of  claim 15 , wherein the proximal end of the endcap defines a first opening and the distal end of the endcap defines a second opening. 
     
     
         17 . A sound suppressor for a firearm, the sound suppressor comprising:
 a housing; and   a first sleeve disposed within the housing, the first sleeve including at least one axial wire and at least one circumferential wire woven with the at least one axial wire, the at least one axial wire and the at least one circumferential wire forming a mesh construct defining a plurality of apertures through the first sleeve.   
     
     
         18 . The sound suppressor of  claim 17 , wherein the housing is disposed about a central axis, and wherein the at least one axial wire extends in a direction substantially parallel to the central axis, and the at least one circumferential wire surrounds the central axis. 
     
     
         19 . The sound suppressor of  claim 18 , wherein the at least one circumferential wire defines a plurality of undulations disposed about the first sleeve. 
     
     
         20 . The sound suppressor of  claim 17 , wherein each aperture defines a substantially rectangular shape disposed between the at least one axial wire and the at least one circumferential wire. 
     
     
         21 . A sound suppressor for a firearm, the sound suppressor comprising:
 a housing surrounding a first central chamber; and   a first sleeve disposed within the first central chamber and surrounding a second central chamber, the first sleeve including a plurality of wires forming a mesh construct defining a plurality of apertures in fluid communication with the first central chamber and the second central chamber.   
     
     
         22 . The sound suppressor of  claim 21 , wherein the housing is disposed about a central axis, and wherein the plurality of wires includes at least one axial wire extending in a direction substantially parallel to the central axis, and at least one circumferential wire surrounding the central axis. 
     
     
         23 . The sound suppressor of  claim 22 , wherein the at least one circumferential wire defines a plurality of undulations disposed about the first sleeve. 
     
     
         24 . The sound suppressor of  claim 21 , wherein each aperture defines a substantially rectangular shape surrounded by at least one of the plurality of wires.