There is provided by the present invention an injection system for use in injecting a liquid into a tree, the system comprising: (A) a liquid supply assembly (10) comprising a liquid supply inlet (34) for providing the liquid to the assembly at ambient pressure, an electric pump (68) for pressurizing and discharging the liquid from the assembly at a first pressure above ambient pressure through a liquid supply outlet (36), a pressure switch (72) connected to the supply outlet and in electrical communication with the pump for selectively actuating the pump when the pressure of the liquid supply outlet falls below said first pressure.

The invention relates to a spray device having a spray nozzle unit and at least one further spray nozzle unit. Each spray nozzle unit has at least one spray nozzle body, wherein at least one spray nozzle body comprises a chamber for receiving a pressurized fluid. The chamber is bound by a spray wall having at least one spray orifice that extends through the spray wall and opens to an external environment. Each of at least one orifice in a spray wall has a substantially identical predetermined size lying in a predetermined range and releases a mono disperse spray jet of the pressurized fluid fed from the associated reservoir. The range within the first spray nozzle unit differs from the range within at least one further spray nozzle unit; particularly, the ranges do not overlap.

The present invention relates to a paint spraying apparatus including a housing, a spray head, and a paint container, with a handle, a first receptacle space for a blower, and a second receptacle space for an air filter are formed by the housing. The housing includes a central housing part having a first housing portion and a second housing portion and a rear housing part. The first housing portion is configured so as to be shell-shaped and open toward the rear housing part, with the second housing portion projecting radially from the first housing portion, such that the first housing portion of the central housing part forms a first part of the first receptacle space, and a shell-shaped first housing portion, open toward the central housing part, of the rear housing part forms a second part of the first receptacle space.

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.

The sprayer comprises a container (1) intended to hold liquid for forming the cleaning mass and pressurized air for spraying it, the container (1) being dismantlably attachable to a head (3) bearing a manual pump (4) to increase the pressure of the air, the head (3) also having a supporting handle (23) with a pushbutton (24) operating the outlet valve (18) for the cleaning mass to the delivery nozzle (22), the sprayer having a manually replaceable mixing device (7, 26) located between the outlet conduit (8) for the liquid from the sprayer container (1) and the outlet of damping mass (20) controlled by the manual valve (18), the mixing device (7, 26) having different passage cross-sections for the liquid and the air present in the container (1) in order to adjust the sprayer to provide cleaning masses with a drier or wetter foam consistency.

A portable fluid dispensing apparatus has a reservoir, a dispenser, and a pump for pressurizing the fluid in the reservoir. The dispenser may be a spray wand. The pump is a hands-free pump such that an operator can hold a dog with one hand, the spray wand with the other hand, and yet still operate the pump, as by using a foot pedal. The apparatus is self-contained, such that there is no need for an external water or electrical power hook-up.

An in-situ foam generation apparatus includes a dissolution chamber that houses a polymer stick cavity or canister, a mixing chamber that houses a static mixer, and a foaming chamber that houses a mechanical agitator in fluid communication with a compressed air inlet. The chambers are in fluid communication with one another by way of a respective chamber inlet and outlet, with the mixing chamber being located between the dissolution and foaming chambers. A pressure regulator can be used to control the incoming aqueous solution pressure to the dissolution chamber. A nozzle exhaust is in fluid communication with the outlet of the foaming chamber. One or more polymer sticks that include one or more cleaning agent can be loaded into the cavity or canister of the dissolution chamber. An end consistency of the polymer stick can be in a range of partially solidified to fully solidified.

Applicant discloses a novel method of spray applying multiple courses of a rapid cure, two part polymer sealant to an aircraft surface. The method sometimes uses a two part polymer mix for use in the aircraft industry that is applied with pneumatic mix and spray gun. The two part cartridge is used in the mix and spray gun so the mix is applied immediately upon mixing, but the two components are kept separated unless the gun is applying the mix. The multiple courses cure to form a clear sealant that allows for inspection of cracks and corrosion beneath the sealant. It cures quickly so that the coated part may be further processed, for example in the assembly line during aircraft build. Applicant further discloses multiple spray gun systems for applying such a two-part polymer mix to aircraft parts.

An apparatus for at least partially dissolving animal waste may include a housing upon which a first and second chamber may be attached. The first chamber may contain a first substance and the second chamber may contain a second substance. Upon application of the first substance and the second substance to the animal waste, a reaction may occur to dissolve at least a portion of the animal waste. A first trigger and a second trigger may each be attached to the housing. The first trigger may be configured so that upon operation on the first trigger, the first substance is expelled from the apparatus. The second trigger may be configured so that upon operation of the second trigger, the second substance is expelled from the apparatus.

The invention described herein generally pertains to in-situ applications of liquid chemicals mixed and dispensed as a spray or a foam and more specifically, to in-situ application of polyurethane foam or froth and the measurement of the temperature of the chemicals used therewith employing temperature-indicating one-component or two-component foam gun nozzles and/or at least one temperature-indicating hose which employs at least one thermochromic material disposed within the foam gun nozzle and/or hoses.