A portable sprayer and a sprayer assembly for use with a conventional, pressurizable spray tank are provided. The sprayer assembly includes a custom tank fitting, a length of hose and a custom spray nozzle. The custom tank fitting includes a threaded portion, a nut shaped central portion and an elongated barbed portion extending from the nut shape central portion. One end of the hose is attached to the elongated barbed portion of the custom tank fitting and an opposite end of the hose is attached to the custom spray nozzle. The threaded portion of the custom tank fitting is engageable with corresponding threads in a pressure tank and, preferably, includes ten threads pre inch. The custom spray nozzle includes a sprayer housing that is at least partially transparent.

In exemplary embodiments of the present invention, Flair based aerosol-type devices can be provided. Such, devices utilize a combination of Flair technology, pre-compression valves and aerosol like pressurization of the dispensed liquid. Such a dispensing device has a main body comprising a pressure chamber, the latter being provided with a pressure piston and a pressure spring. The device further has a piston and a piston chamber which draws liquid from a reservoir and fills the pressure chamber with that liquid as a user operates the trigger in various compression and release strokes. The piston chamber has both an inlet valve and an outlet valve. In a dispensing head a valve is provided to regulate the strength of the flow and preclude leakage. Once the liquid is sufficiently pressurized, it can be dispensed by a user opening an activation valve, such as by pressing on an activation button, and spray can be abruptly stopped by a user ceasing to push on such button. Or, for example, in alternate embodiments without an activation button, once the liquid is sufficiently pressurized, continuous spray occurs until the pressure chamber is emptied. By repeatedly pumping the trigger before the pressure chamber is fully emptied, continuous spray can be achieved. By designing the input volume to be amply greater than the volume of the pressure chamber, continuous spray with fewer pumping strokes can be implemented.

An improved personal cooling misting system having a dual 360 rotating articulating nozzle with an integrally formed purge valve. The improved personal cooling misting system provides for a wearable fluid reservoir to contain a volume of misting fluid, and an electrically operated pump proximate to the reservoir to pump the misting fluid from the reservoir to a misting head. The misting head facilitates atomizing the misting fluid. The improved system further provides for feed tubing to direct the misting fluid from the reservoir to the pump, and distributive tubing to direct the misting fluid from the pump to the misting head. The improved system also includes a pump control to control at least one of a pressure and a flow rate of the misting fluid.

The present invention relates to pathogen cleaning and simulation of pathogen spreading. More particularly, some implementations of the described invention relate to systems and methods for spraying materials in a manner that mimics the spreading of pathogens from coughing or sneezing. Some implementations further relate to using a non-aerosol sprayer that produces both a mist and droplets of a mixture containing water, a fluorescent marker, a surfactant, and an antifoaming agent. In some cases, the pump sprayer defines an internal compartment that includes the mixture. In some cases, the sprayer further includes a pump mechanism that is configured to be pumped to compress a gas within the compartment and a release valve that is configured to release pressure within the compartment through a spray nozzle of the sprayer such that droplets and mist of the mixture are sprayed from the nozzle. Other implementations are also described.