A print head comprising nested chambers for in-situ reactant formation is disclosed. The print head comprises a first chamber nested within a second chamber. The first chamber comprises a first nozzle, the second chamber comprises a second nozzle. The first nozzle is substantially coaxial with the second nozzle. A susceptor to convert electromagnetic energy to heat is within the first chamber. The susceptor comprises one or more openings extending between the upper portion and the lower portion. The susceptor may be heated by induction heating or by optical heating to vaporize a precursor substance within the first chamber. The vapor may react with a reactive gas flowing through the first chamber or expand through a nozzle into a second chamber where the vapor may react with the reactive gas, forming nanoparticles. Patterned films may be written onto a two-dimensional or three-dimensional surfaces.

A print head comprising nested chambers for in-situ reactant formation is disclosed. The print head comprises a first chamber nested within a second chamber. The first chamber comprises a first nozzle, the second chamber comprises a second nozzle. The first nozzle is substantially coaxial with the second nozzle. A susceptor to convert electromagnetic energy to heat is within the first chamber. The susceptor comprises one or more openings extending between the upper portion and the lower portion. The susceptor may be heated by induction heating or by optical heating to vaporize a precursor substance within the first chamber. The vapor may react with a reactive gas flowing through the first chamber or expand through a nozzle into a second chamber where the vapor may react with the reactive gas, forming nanoparticles. Patterned films may be written onto a two-dimensional or three-dimensional surfaces.

A paint spray nozzle is provided for a paint spray system. The nozzle includes a single-piece body having a conduit portion. The conduit portion includes a first surface defining a first passage that terminates at an orifice along a longitudinal axis and a second surface that defines a second passage along the longitudinal axis. The second passage is fluidly connected to the orifice. The orifice is configured to direct the paint to flow along a flow path through the second passage. The second surface defines an inlet cross-sectional width positioned at the orifice and an outlet cross-sectional width positioned at an outlet. The outlet cross-sectional width is larger than the inlet cross-sectional width, such that the paint that deposits on the second surface is positioned relative to the longitudinal axis to be re-absorbed into the flow path of the paint.

Embodiments of the disclosed subject matter provide an apparatus having a device with a micronozzle array disposed on a micro-fabricated fluidic die. The device may include a first gas distribution plate and a second opposing plate, where the micro-fabricated fluidic die is disposed between the first gas distribution plate and the second opposing plate, wherein the first gas distribution plate is irreversibly joined to the micronozzle array with a seal that is gas-tight, and where the first gas distribution plate includes a plurality of sealed flow paths. A manifold may be reversibly joined to the first gas distribution plate, where the micro-fabricated fluidic die and the first gas distribution plate and the second opposing plate are disposed between the manifold. A thermally conductive plate may have at least one window that provides a clearance fit for the device across a range of motion relative to the thermally conductive plate.

A system and method treating a horizontal surface of uncured concrete. The surface treatment system comprises a boom mounted to a vehicle body and an implement mounted to a mounting plated disposed at the working end of the boom. The implement comprises a texturing brush configured to engage a horizontal surface of the uncured concrete to apply a texture pattern thereto. The implement also comprises a first and second spray bars. The first spray bar is configured to apply a first chemical to the bristles of the texturing brush when in an engaged position. The second spray bar is configured to concurrently apply a second chemical to the textured surface of uncured concrete while the texturing brush is applying the texture pattern to the horizontal surface of the uncured concrete.

A vessel rinsing apparatus including a mounting base, a fluid discharge member including a plurality of nozzles, a valve member operably coupled to the fluid discharge member and configured to control water flow through the nozzles, and an escutcheon supported by the mounting base.

A wastewater spray distribution apparatus is operative to distribute wastewater produced by a sewage treatment system (10) onto a ground level (22) through operation of sprayers (118, 260). The exemplary sprayers include a manifold (142, 262) that includes outlet nozzles (158, 264) that can be readily removed and replaced. The exemplary manifold further includes interior areas bounded by surfaces that slope continuously downward from the outlet nozzles to the manifold inlet to assure the draining of water therefrom. Each of the nozzles include a base (140) which includes brake (207). A brake is provided in each nozzle and is adjustable to provide brake force to limit rotational movement produced by the thrust of water passing from the outlet nozzles to assure that the sprayer operates at the appropriate rotational speed. Alternative arrangements include manifolds including fixed or adjustable flaps and radially outwardly adjustable arms to adjust rotational properties.

Water outlet fitting, e.g. tap or shower head, producing a combined flow of gas and water, and power connector therefor An apparatus produces bubbles of pure water from a flow emitter (11) comprising an annular water outlet (13) surrounding a gas outlet (12) and operating within a defined parameter space. One or more flow emitters may be incorporated into an emitter body (10) configured as a shower head or a tap. In another aspect, an apparatus produces bubbles of water from coaxial, gas and annular water flowpaths. In another aspect, a magnetic power connector is arranged to supply electrical energy to a shower head.

There is provided a spray apparatus. A first nozzle is configured to eject mist. A second nozzle is provided around the first nozzle. The second nozzle is configured to suck a part of the mist ejected from the first nozzle and to eject a remnant of the mist to an ejection target.

There is provided a spray apparatus. A first nozzle is configured to eject mist. A second nozzle is provided around the first nozzle. The second nozzle is configured to suck a part of the mist ejected from the first nozzle and to eject a remnant of the mist to an ejection target.