US 11,988,476 B2
Expansion chamber assembly and a method of manufacturing the same
Paul T. Noonan, Boise, ID (US)
Assigned to F.M. Products Inc, Boise, ID (US)
Filed by F.M. Products Inc, Boise, ID (US)
Filed on Feb. 1, 2022, as Appl. No. 17/590,708.
Application 17/590,708 is a continuation of application No. 15/987,833, filed on May 23, 2018, granted, now 11,268,776.
Claims priority of provisional application 62/510,707, filed on May 24, 2017.
Prior Publication US 2023/0003478 A1, Jan. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F41A 21/30 (2006.01); F41A 21/28 (2006.01)
CPC F41A 21/30 (2013.01) [F41A 21/28 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A expansion chamber assembly for a firearm, the expansion chamber assembly comprising:
an outer tube comprising a front end and a rear end;
a front cap coupled with the outer tube at the front end;
a rear cap coupled with the outer tube at the rear end; and
an inner tube retained within the outer tube by the front cap and the rear cap, wherein the inner tube comprises one or more through apertures to allow a portion of expanding gasses to move from the inner tube into the outer tube;
wherein the portion of expanding gases move from the inner tube into the outer tube through the one or more through apertures;
wherein the portion of expanding gasses move from the outer tube to outside the expansion chamber assembly directly through one or more exit apertures located in the rear cap.