Patent ID: 6349650
Filing Date: 2002-02-26
Classification: F42B

Abstract:
A tear gas expulsion grenade using pressurized carbon dioxide comprising a housing, a source of pressurized carbon dioxide in a container with a top closure of pierceable construction material from which said container is mounted in descending relation in said housing, a said carbon dioxide container-piercing component in said housing disposed in a clearance position above said container top closure operatively mounted to be urged in descending movement into piercing contact with said carbon dioxide container top closure and in returning ascending movement to said clearance position, wall means bounding a tracking compartment for said opposite direction descending and ascending movement of said piercing component, said tracking compartment having vent openings adjacent a base thereof in communicating relation to said carbon dioxide container, and a propelling charge operatively effective to urge said piercing component in said descending movement with expanding gas and to permit said ascending movement thereof upon contracting of said gas, said piercing component having an operative position after an expanding gas-caused descent simultaneously causing a piercing of said carbon dioxide container top closure and closing said tracking compartment vent openings, whereby passage of released pressurized carbon dioxide is initially confined to said tracking compartment and only subsequently is in communication with said carbon dioxide through said opened vent openings.