Patent ID: 7223166

Claim:
A scent distribution system for an air circulating system for a building, the air circulating system having a duct with an air passage through which air is passed prior to introduction of the air into the living space of the building, the air circulating system having a fan for moving air through the air circulating system, the air circulating system having a fan switch for selectively supplying electrical power to the fan, the system comprising: a tank system for holding a scent substance, the tank system including a tank housing having a reservoir for holding a scent substance therein; a pump for pumping the scent substance out of the reservoir, the pump having an inlet in fluid communication with the reservoir and an outlet; an outlet conduit in communication with the outlet of the pump for receiving the scent substance pumped by the pump; a dispensing nozzle for mounting on the duct of the air circulating system such that an orifice of the nozzle is in communication with the air passage of the duct, the dispensing nozzle being connected to and in fluid communication with the outlet of the pump through the outlet conduit; a duration timer for selectively controlling a duration of dispensing of the scent substance, the duration timer controlling supply of electrical power to the pump, the duration timer being adjustable to set the duration of the supply of electrical power to the pump for dispensing the scent substance, the duration timer being triggerable to supply electrical power to the pump for the selected time duration by a trigger; an occurrence timer for selectively controlling a time period between occurrences of dispensing of the scent substance, the occurrence timer triggering the duration timer after passage of a selected time period; a regular/irregular selector switch for controlling the actuation of the duration timer, the regular/irregular selector switch having an irregular setting wherein the trigger is sent to the duration timer by the fan switch of the air circulating system upon operation of the fan of the air circulating system, the regular/irregular selector switch having a regular setting wherein the trigger is sent to the duration timer by the occurrence timer upon the passage of the selected time period.