Patent ID: 8322266

Claim:
A firearm suppressor comprising: a. a suppressor housing, with vent holes, extending from the muzzle end of a firearm barrel; and b. means for controlling and reducing static pressure of exit gases exiting the muzzle of a discharged firearm while dissipating a blast wave and thereafter ingesting external air through the vent holes to purge, dilute and cool residual gases, wherein the means comprises: i. a first-stage mixer/ejector in a first expansion chamber inside the housing, comprising a lobed mixer nozzle and a first lobed ejector, wherein the first-stage mixer/ejector is adapted in size and shape to use the kinetic energy of the exit gases to pump external air in and through the vent holes, and wherein contours of internal lobes for the lobed mixer nozzle and the first lobed ejector interact to mix the ingested external air with the firearm's exit gases to reduce firearm noise and flash; and ii. a second-stage mixer/ejector inside the housing comprising the first lobed ejector operating as a second-stage mixer, and a second lobed ejector nozzle in an entrance of a second expansion chamber which extends downstream into the second expansion chamber.