20120153039 | Pneumatic Vacuum System for the Delivery of Odorant Emission from Scented Substrates - The controlled delivery of odorant emissions is the primary function of this invention. Containment of the odorant emission is achieved by storing the scented material in a low vacuum chamber sealed by pair of solenoid valves at its openings. The opposite end of each solenoid valve is connected either to the ingress or egress manifold. A vacuum pump induces airflow through a chamber when the corresponding solenoids valves are opened, thereby delivering the scent into the atmosphere. | 06-21-2012 |