Patent ID: 9739559
Date: 2017-08-22
CPC Classifications: F41A

Claim:
1. A firearm sound suppressor comprising: a shell having an inner surface and a constant inner diameter; and a core disposed within the shell and extending from a first end of the shell to a second end of the shell, the core having a body consisting essentially of first and second stages, the first stage being adjacent to a barrel of a firearm when the suppressor is attached to the firearm, an outer surface of the first stage directly engaging with the inner surface of the shell along an entire length of the first stage, and an outer surface of the second stage being spaced from the inner surface of the shell; wherein the first stage includes one or more baffles that define one or more chambers, at least one of the one or more baffles in the first stage being angled at a non-perpendicular angle relative to the core body; wherein the second stage includes one or more baffles that define one or more chambers, at least one of the one or more baffles in the second stage being angled at a non-perpendicular angle relative to the core body; wherein an outermost diameter of the first stage of the core body is larger than an outermost diameter of the second stage of the core body such that the second stage and the shell cooperate to provide greater gas expansion as compared to the cooperation of the first stage and the shell; wherein an annular air gap is formed in the entirety of the space between the outer surface of the second stage of the core body and the inner surface of the shell.