Riot control and warfare agent spraying apparatus uses a time relay to prevent freezing by controlling a fast acting valve to intermittently cut off a mixture of the gas and a non-flammable propellant

摘要

Riot control and warfare agent spraying apparatus using a non-flammable propellant (R134a). The agent is forced out of a reservoir using an injection process, A time relay is included for controlling a fast opening valve and for cutting off the climate and ventilation control plant.