Firearm silencer and flash attenuator

• US 5,136,923 A
• Filed: 07/08/1991
• Issued: 08/11/1992
• Est. Priority Date: 07/30/1982
• Status: Expired due to Term

• Current Assignee: Donald J. Walsh Jr
• Original Assignee: Donald J. Walsh Jr
• Inventors: Walsh, Donald J. Jr.
• Primary Examiner(s): Maples, John S.
• Application Number:
  US07/728,056
• Time in Patent Office: 400 Days
• Field of Search: 89/14.2, 89/14.4
• US Class Current: 89/14.2
• CPC Class Codes: F41A 21/30 Silencers

Abstract

A firearm sound suppressor which includes an outer housing, an interior perforated tube located within the outer housing, and spacing between the outer housing and interior perforated tube, and method of making. The sound suppressor is adapted to be mounted on a firearm.

Claims

1. A sound suppressor for mounting on a firearm wherein the suppressor consists essentially of:

a) an outer housing;

b) an interior hollow tube located within said outer housing at least substantially the length of the housing which is to be located forward of the muzzle of a firearm to which the suppressor is to be attached, wherein said tube is for receiving a projectile discharged from the firing chamber of said firearm, said tube being perforated with a plurality of ports, the minimum diameter of ports being at least about 50% of the inside diameter of said interior tube, and the minimum thickness of the wall of said tube being at least about 1/8 inch, and wherein said interior hollow tube has a bore larger than the bore of the muzzle of a firearm to which the suppressor is to be attached to thereby provide clearance for said projectile;

c) spacing between said housing and said tube; and

d) packing material located within said spacing; and

wherein said spacing is divided into two chambers by a radially extending partition located about midpoint of the length of the suppressor which is to be forward of the muzzle of the firearm and wherein packing is present in only the chamber closest to the muzzle of the firearm to which the suppressor is to be attached.

2. The suppressor of claim 1 wherein said minimum diameter is at least about 75% of the inside diameter of said interior tube.

3. The suppressor of claim 1 wherein said minimum diameter is about 1 to about 1.5 times the inside diameter of said interior tube.

4. The suppressor of claim 1 wherein said ports are angled at about 30°

to about 60°

back towards the muzzle of the firearm to which the suppressor is to be attached.

5. The suppressor of claim 1 wherein said minimum diameter is at least about 75% of the inside diameter of said interior tube;

said ports are angled at about 30°

to about 60°

back towards the muzzle of the firearm to which the suppressor is to be attached;

said interior tube includes means for directly attaching said interior tube to said barrel, and wherein said interior tube has a bore larger than the bore of the muzzle of a firearm to which the suppressor is to be attached to thereby provide clearance for said projectile.

6. The suppressor of claim 1 wherein the minimum thickness of the wall of said interior tube being at about 3/16 inch.

8. The suppressor of claim 1 wherein said minimum diameter is about 1 to about 1.5 times the inside diameter of said interior tube.

7. A sound suppressor and firearm combination wherein the firearm has a barrel with an axis and an inner diameter and wherein said suppressor consists essentially of a thin walled outer housing and an interior tube with walls which are thicker than the walls of said housing, wherein said inner tube has radial perforations, wherein said interior tube has a bore larger than the bore of the muzzle of said firearm to which the suppressor is attached to thereby provide clearance for a projectile from said barrel, said suppressor also including means between the outer wall and interior tube to define a volume therebetween;

and means for directly attaching said interior tube to the barrel of said firearm and whereby the axis of the barrel is sufficiently aligned with the axis of said interior tube so that said interior tube is capable of receiving a projectile from said barrel and wherein said volume is divided into two chambers by a radially extending partition located about midpoint of the length of the suppressor located forward of the muzzle of the firearm and wherein packing is present in only the chamber closest to the muzzle of the firearm to which the silencer is attached.

9. The firearm of claim 7 wherein said interior tube contains threads to mate directly with threads on said barrel.

10. A method of fabricating a sound suppressor for mounting on a firearm which comprises:

a) providing a relatively thick walled interior tube having radial perforations and having a bore larger than the bore of the muzzle of a firearm to which the sound suppressor is to be attached to thereby provided clearance for projectile from the barrel of said firearm;

b) wrapping knitted metallic fabric around the outside diameter of said interior tube; and

c) enclosing the wrapped interior tube within a thin walled outer shell having walls thinner than the walls of said interior tube;

d) dividing the space between the said interior tube and said outer shell divided into two chambers by a radially extending partition located about midpoint of the length of the suppressor which is to be forward of the muzzle of the firearm and providing said fabric in only the chamber closest to the muzzle of the firearm to which the silencer is to be attached.

11. The method of claim 10 wherein the wrapping provides a metallic to air density of about 5-15%.