A backpack sprayer includes a housing, a spray nozzle assembly, a fan assembly and a switch assembly. The housing is configured to contain a liquid. The spray nozzle assembly is communicated with the housing, and is configured to spray the liquid out from the housing. The fan assembly is connected to the spray nozzle assembly, and is configured to provide the spray nozzle assembly with power to spray the liquid out from the housing. The switch assembly is connected to the spray nozzle assembly and electrically connected to the fan assembly, and is configured to control opening and closing of the spray nozzle assembly and start and shutdown of the fan assembly simultaneously.

A system and method for dermal spraying includes a portable, hand-held dermal application device with disposable formulation capsules that spray a formulation unto the skin and a data transmission unit operatively connecting the dermal spray device to a mobile device. The mobile device communicates with a remote server and transmits anonymized data about the user's skin conditions and treatment history. The anonymized data may be labelled and classified by a dermatologist, and stored on a secure cloud server. The anonymized data is used to train models for serum and treatment plan recommenders.

A system and method for dermal spraying includes a portable, hand-held dermal application device with disposable formulation capsules that spray a formulation unto the skin and a data transmission unit operatively connecting the dermal spray device to a mobile device. The mobile device communicates with a remote server and transmits anonymized data about the user's skin conditions and treatment history. The anonymized data may be labelled and classified by a dermatologist, and stored on a secure cloud server. The anonymized data is used to train models for serum and treatment plan recommenders.

A system and method for dermal spraying includes a portable, hand-held dermal application device with disposable formulation capsules that spray a formulation unto the skin and a data transmission unit operatively connecting the dermal spray device to a mobile device. The mobile device communicates with a remote server and transmits anonymized data about the user's skin conditions and treatment history. The anonymized data may be labelled and classified by a dermatologist, and stored on a secure cloud server. The anonymized data is used to train models for serum and treatment plan recommenders.

Fluid applicator assemblies which can be attached to or fabricated integrally with a blowing apparatus such as a leaf blower as a source of flowing air to atomize and eject atomized liquids into spaces and/or onto surfaces may include a nozzle having a nozzle body. At least one air flow cavity may be provided in the nozzle body. An air inlet slot may extend through the nozzle body and may be disposed in fluid communication with the at least one air flow cavity. A fluid ejection portion may be carried by the nozzle body. The fluid ejection portion may include an ejection head support extending from the nozzle body. A fluid ejection head may be carried by the ejection head support. A tube opening may extend through the fluid ejection portion. A fluid ejection slot may be provided in the fluid ejection head and disposed in fluid communication with the tube opening. A liquid container may be disposed in fluid communication with the fluid ejection slot through the tube opening. Other embodiments of the fluid applicator assemblies are disclosed.

A paint spray gun includes a gun body formed as a unitary one piece structure composed of a tubular body portion, a valve connection portion, an air passageway portion and a feed connection portion. A spray cap is disposed on the tubular body portion and has a cap opening. The tubular body portion has an air chamber that is covered by the spray cap and that communicates with said cap opening, and a feed passage connected to the chamber. The valve connection portion, the air passageway portion and the feed connection portion are formed as one piece with the tubular body portion without welded joints.

Spray apparatus and uses thereof are described herein. A vacuum spray nozzle apparatus may include a first tube in fluid communication with a fluid source, a rotor coupled to the tube, a conduit in fluid communication with the passages of the first tube, and a second tube coupled to the conduit, the second tube being in fluid communication with a vacuum source. The rotor is in fluid communication with the pressurized fluid source. The conduit is substantially arched or angled such that an outlet of the conduit is offset a radial distance in a radial direction from the rotor axis, and when pressurized fluid is ejected from the outlet, during use, rotates the conduit. The vacuum spray nozzle apparatus is configured to remove components from a material through the second tube when a pressure of the system is reduced using the vacuum source.

Nozzle assemblies (10) for spray guns are disclosed. The nozzle assemblies (10) generally include a fluid outlet (100) extending along a fluid axis (102), the fluid outlet (100) including a fluid aperture (104) and a fluid side wall (164) defining the fluid aperture (104), an atomizing aperture (108) adjacent the fluid side wall (164) and at least partially surrounding the fluid axis (102), an atomizing inlet (110) configured to receive a pressurized gas, and an adjustment member (150) located on the nozzle assembly (10) and movable to: (i) an atomizing position such that the atomizing inlet (110) is in communication with the atomizing aperture (108), and (ii) a non-atomizing position such that the atomizing inlet (110) is not in communication with the atomizing aperture (108). The foregoing nozzle assemblies (810) allow dispensing of fluid coating media in both spray and bead patterns with improved ease of cleaning, superior spray performance, and adaptability with existing spray gun platforms.

A spray applicator assembly discharges distributable product from a cartridge using low air pressure. The cartridge is held captive between a piston advancing from the rear to expel contents and a nozzle snugly attached at the front to receive expelled contents and to convert the contents into droplets by subjecting the contents to an array of focused high velocity air streams. The nozzle has an open barrel design and is able to discharge a variety of liquid or viscous distributable product without readjustment, other than resetting a proportioning valve in the low pressure air feed line. An air chamber immediately in front of the cartridge nose provides constant backpressure, which dominates to cleanly stop flow of distributable product into the nozzle whenever the piston stops advancing. When the piston resumes advancement, the flow restarts cleanly. Clean stopping and starting saves distributable product from waste. Variations in the distributable product might include, without limitation, a broad variety of materials including coating materials and combustibles.

An unheated, essential oil diffuser relies on a pressurized air stream to educt oil from a reservoir, followed by separators including separation chambers and an annular channel. The latter is a long channel having an aspect ratio (L/d) of from about 10 to about 120, for length L and thickness d. Thickness d is effective diameter, also known as hydraulic diameter (4 times c.s. area, divided by “wetted” or exposed perimeter), and may be from about 25 to about 100 thousandths of an inch (0.6 to 2.5 mm) across the thin passage, with a target range of from about 55 to 75 mils (0.7 to 1 mm). This geometry provides laminar flow at Reynolds number values less than a few hundred for virtually its complete distance of from under one inch (25 mm) to over three inches (76 mm).