Patent ID: 6866165

Claim:
An aerosol canister assembly for delivering a chemical from an interior cavity of a canister to a desired location, the assembly comprising: a canister suitable for holding a chemical mixed with a pressurized propellant gas, the canister having a valve with an upwardly open female cavity, the valve being suitable for controlling the delivery of the chemical from the canister to the outside of the canister when the chemical is positioned in the canister with the propellant gas; and an over cap positionable on the canister over the valve, the over cap having a nozzle opening and being linked to a valve stem; wherein the valve stem is insertable into the female cavity by axial relative movement there between, the valve stem defining a pathway for expelling the chemical in the canister from the nozzle opening when the valve is opened by the valve stem if the chemical is positioned in the canister with the propellant gas; wherein the canister is retained by a housing, a shaft is connected to the housing at one end and mounts a handle at an opposite end, the handle having a trigger, and there is an initiator assembly causing movement of the trigger to move a portion of the over cap when the chemical is to be dispensed; and wherein the housing includes an alignment protrusion and the over cap has a top wall defining a recess sized to receive the alignment protrusion such that the over cap is received in the housing in a correct orientation.