A system for spraying granular pasty matrices onto buildings, the system including a spray gun for wet mortar which makes possible the easy, safe, and efficient spraying of wet mortar including aggregates with a particle size D50 of between 1 and 15 millimeters. The spray gun is provided with a gun body with at least one injector emerging in a contacting chamber, at least one spray nozzle for mortar, and at least one connection end piece mounted on an inlet of a body for flow of mortar. Flow of mortar within a guiding duct of the body is monodirectional or multidirectional having angular deviation <30. The position of an injection head of the injector in the chamber is adjustable. The mortar is constituted by a pasty matrix including aggregates, fillers and additives. The aggregates have a D50=1-15 mm and a form factor F1.

A nozzle assembly includes a mixing channel and an aerator. The mixing channel has upstream and downstream ends defining a flow direction through the mixing channel and includes a housing wall and a mixer. The housing wall defines a flow passage and includes an inlet portion and a tip orifice. The inlet portion disposed at the upstream end and configured to receive a first material and a second material. The tip orifice is disposed at the downstream end and is configured to emit a plural component material from the mixing channel. The mixer is disposed within the mixing channel and is configured to mix the first material and the second material into the plural component material. The aerator is configured to flow nucleation air to a location downstream of an upstream end of the mixer and into a flow of the plural component material.

A nozzle assembly includes a mixing channel and an aerator. The mixing channel has upstream and downstream ends defining a flow direction through the mixing channel and includes a housing wall and a mixer. The housing wall defines a flow passage and includes an inlet portion and a tip orifice. The inlet portion disposed at the upstream end and configured to receive a first material and a second material. The tip orifice is disposed at the downstream end and is configured to emit a plural component material from the mixing channel. The mixer is disposed within the mixing channel and is configured to mix the first material and the second material into the plural component material. The aerator is configured to flow nucleation air to a location downstream of an upstream end of the mixer and into a flow of the plural component material.

A nozzle assembly includes a nozzle housing (86) defining an inner chamber (91) and a mixer (90) disposed within the inner chamber. The nozzle housing includes a nozzle housing and a nozzle orifice. The nozzle receive is configured to connect to a sprayer housing and to receive a first material, a second material, and air. The nozzle orifice is configured to spray a plural component material formed by a mixture of the first material and the second material. The mixer includes a shaft (92), an extension (94), an air channel, and inlet orifice formed in a first end of the shaft, and an outlet orifice formed between the air channel and a surface of the shaft. The extension defines a mixing channel extending between the shaft and the inner surface of the housing and the air channel is defined by an inner surface of the shaft and extends partially axially through the shaft.

A medical device includes a sheath, a cap coupled to a distal end of the sheath, and a connector at a proximal end of the sheath. The sheath has a first lumen and a second lumen extending from the proximal end to the distal end of the sheath. The cap defines a cavity between the distal end of the sheath and a distal wall of the cap. A distal opening extends through the distal wall of the cap. The connector is configured to provide fluid communication between: (1) a first fluid source and the first lumen, and (2) a second fluid source and the second lumen. Upon delivery of a fluid from the first lumen into the cavity and a gas from the second lumen into the cavity, an at least partially aerosolized fluid is delivered via the distal opening.

Disclosed is a simple and cost-effective technique for generation of high-throughput aerosols of uniform-diameter submillimeter-size core-shell particles. An aerosol may be created by using, e.g., a first tube filled with liquid and having a small hole through a sidewall, then passing a fluid through the liquid via a second tube passing partially though the first tube at a location above the small hole, forming coaxial flow through the small hole. The diameter of generated core-shell particles scales with the inner and outer diameter of the gas tube nozzle, enabling control on the size of the produced particles. Further disclosed is a simple, scalable and cost-effective technique that enables microencapsulation of various materials. Including highly viscous materials, into sub-10 m particles. A specially designed atomizing tube interacts with bubbles formed in a liquid comprising a plurality of immiscible liquid layers to generate aerosols of droplets which have layered core-shell structure.

Pneumatic spray guns (10) for applying sprayable materials (M) to various surfaces are disclosed. During use of the pneumatic spray guns (10), a tube (T) of flowable texture material (M) to be sprayed is loaded into a pressure canister (12) of the spray gun (10). Pressurized air is fed to the tube (T) of material (M) to be sprayed and is also fed to a spray nozzle region of the gun (10) to contact the material (M) after it has exited the tube (T) in order to provide a desired spray pattern (S). The pressure applied to the pressure canister (12) and/or the pressure applied to the spray nozzle (20) may be varied in order to control the spray pattern (S).

A fluid control device includes a first conduit having a first end and a second end, and a first fluid that moves within the first conduit between the first end and the second end. The first conduit includes an interior surface defining a cavity of the first conduit. The fluid control device includes a second conduit having a third end and a fourth end, and a second fluid that moves within the second conduit between the third and fourth ends. At least a portion of the second conduit extends within the cavity of the first conduit. The first fluid is separate from the second fluid as the first fluid moves within the first conduit and the second fluid moves within the second conduit.