US Patent 8469244 Overcap and system for spraying a fluid

A volatile material dispenser includes a housing adapted to be releasably mounted on a container having a tilt-activated valve stem. The housing includes a discharge orifice. A drive unit is disposed within the housing, wherein the drive unit is activated in response to a signal from at least a sensor, and wherein the drive unit is adapted to radially displace the tilt-activated valve stem in response to the signal.