A spray gun for a plural component system is provided. The spray gun includes a first component delivery line and a second component delivery line. The spray gun also includes a nozzle, configured to receive and mix a first component received from the first component delivery line with a second component received from the second component delivery line. The spray gun also includes an air purge system configured to, when the spray gun is in a non-actuated position, purge the nozzle of the first and second components and, when the spray gun is in an actuated position, aid in atomization of the mixture of the first and second components.

A foam output device, such as a dispenser, a gun, a turreted cannon, a hose adapter, an aerosol can, or others. The foam output device includes a valve configured to switch between a first mode and a second mode. The valve is configured to simultaneously receive a plurality of compositions and a fluid during the first mode such that the compositions and the fluid are able to react with each other within the valve to form a foam thereby. The valve is configured to prevent the compositions and the fluid from reacting with each other in the valve during the second mode.

A drain gun includes a handle and a trigger. The handle includes a channel and a plurality of inlets. The inlets feed the channel. The trigger causes a staged release of a plurality of fluids from a plurality of cartridges to the channel via the inlets when the cartridges are stored in the handle and feeding the inlets.

A marking gun having a marker container, a propellant canister, a supply tube, an expulsion chamber, and an attachment coupled to the expulsion chamber. The marker container is coupled to the expulsion chamber by the supply tube, and the propellant canister is coupled to the expulsion chamber. The marking gun is configured to expel the marker from the expulsion chamber. The attachment comprises a stencil, an elastic pointed tip, a housing, a screen, a magnet, one or more entry holes, or a combination thereof.

The disclosure presents templates that can be useful in construction. Embodiments of the templates include a face, and two or more indicators. The indicators are located at one or more predetermined intervals on the face, and each indicator defines a window. Each window is of a predetermined length, and each indicator is coded to indicate that each indicator is located at one of the one or more predetermined intervals.

A foam dispenser having a metal housing has a spool valve socket therein. A metal handle extends from the housing. A spool valve is disposable within the spool valve socket. A trigger couplable to the spool valve enables the spool valve to be rotated between open and closed orientations within the housing. The spool valve has internal channels for selectively passing liquids through the spool valve in the open orientation and not in the closed orientation. The spool valve also has a channel for selectively passing a gas through the spool valve in both the open and closed orientations.

A massage nozzle includes a nozzle housing and a nozzle core detachably attached in the nozzle housing. The nozzle housing is split-type and includes a cover mounted in a hole of a wall of a hot tub, a nozzle seat and a fastener. The cover includes an end ring and a side wall extending from the end ring. The side wall is conformed with the hole. The nozzle seat includes an inlet and a spray end which has a surface conformed with the side wall. The nozzle seat passes through and detachably connects with the cover. The outer circumferential surface of the spray end contacts with an inner surface of the side wall. The fastener is detachably sleeved on the outer circumferential surface of the nozzle seat and cooperates with the cover to fix the nozzle seat to the hot tub. The installation is convenient and the cost is reduced.

An aerosol unit for an aerosol dispenser, which aerosol unit comprises an axially oriented body, having a distal inlet part and a proximal outlet part; a carrier member arranged in the body, transversally to the axis between the inlet part and the outlet part; and wherein the carrier member comprises through-holes which place the inlet part in fluid communication with the outlet part, and wherein the carrier member is insert-moulded into the body such that a contact surface between the carrier and the body forms an air-tight seal.

A mixer for a plural component spray gun is presented. The mixer has a mixer body comprising a mixing chamber with an outlet. The mixer also has a first fluid component inlet, coupled to a first fluid conduit, configured to introduce a first fluid component into the mixing chamber. The mixer also has a second fluid component inlet, coupled to a second fluid conduit, configured to introduce a second fluid component into the mixing chamber. The first and second fluid component inlets are offset with respect to a centerline of the mixing chamber and positioned such that a first fluid flow from the first inlet is directed toward the outlet, and a second fluid flow from the second inlet is directed toward the outlet.

A system (1, 101, 201) for spraying hot-melt adhesive onto glued surfaces comprising a melter (61) to heat hot-melt adhesive, an air compressor (60), a power and control system (63) and a gun (10). The gun (10) is connected to the melter (61) by a pipe (53) with screw connectors (54, 55), through which a hot-melt adhesive being heated flows, and the air compressor (60) by an air pipe (56) with screw connectors (57, 58) through which a pressurized compressed air flows. The gun (10) has a nozzle (20) with a hot-melt adhesive outlet or orifice (21) and a compressed air outlet (23). The pipe (53) through which flows the hot-melt adhesive having a viscosity between 2500 mPa.Math.s and 7000 mPa.Math.s and a temperature between 120° C. and 200° C., and a density between 0.8 kg/dcm.sup.3 and 1.4 kg/dcm.sup.3, and the air pipe (56) are fitted in an insulating layer of a hose (50), and wherein the throughput of the pipe (53) through which the hot-melt adhesive being heated flows is between 0.5 kg/h and 1.5 kg/h, while the air pipe (56) has a throughput between 0.1 m.sup.3/min and 0.6 m.sup.3/min.