A fluid sprayer includes a pump and an electrostatic module configured to provide an electrostatic charge to spray fluid. The electrostatic module is electrically connected to a conductive component of the fluid sprayer, such as a fluid displacement member, fitting, cylinder, or spray tip, to charge the spray fluid via the conductive component. The fluid is electrostatically charged prior to exiting the fluid sprayer.

An applicator is disclosed for applying a treatment solution to a treatment site of a patient. The applicator can include an applicator housing comprising a treatment solution reservoir. A cartridge can be removably disposed in the housing. The cartridge when arranged in the housing can be in fluid communication with the treatment solution reservoir. The cartridge can include an electrostatic module for electrostatically charging the treatment solution in the treatment solution reservoir; and a nozzle for applying the treatment solution.

A portable, hand-held electrospinning or electrospraying device and system, method, and portions thereof are described. Such device can be for electrospinning or electrospraying a predetermined solution toward a deposit surface. The device can have a durable portion, a semi-durable portion, and a consumable portion. The consumable portion can be received and held by the semi-durable portion, and the semi-durable portion holding the consumable portion can be removably coupled to the durable portion.

An atomizer nozzle system, in particular for an electrohydrodynamic atomizer (1), wherein a nozzle cap (40) comprises a plurality of nozzles (10, 11, 12) and, in order to form a nozzle (10, 11, 12) comprises at least one nozzle opening (21, 22, 23), at least one nozzle channel and at least one nozzle socket, wherein the nozzle cap is arranged on at least one carrier and wherein the carrier comprises a nozzle connector for each nozzle socket, wherein the nozzle cap is arranged on the carrier in a releasably fastened manner.

In an electrostatic atomization coating apparatus including a nozzle head including a plurality of coating material ejection ports; a coating material chamber that is provided inside the nozzle head and to which a coating material is supplied via a coating material supply path, each of the coating material ejection ports being in communication with the coating material chamber via an individual branch coating material path; and a voltage application device that provides a potential difference between the nozzle head and an object to be coated, the coating material ejected from each of the coating material ejection ports via the coating material supply path, the coating material chamber, and the branch coating material path being brought into a charged state through application of a voltage by the voltage application device, an open/close valve device that opens and closes all of the branch coating material paths, or opens and closes a specific subset of a plurality of branch coating material paths out of all of the branch coating material paths is provided. Thus, it is possible to prevent external air from entering the nozzle head, and the coating material from leaking to the outside of the nozzle head.

A coating apparatus can include a spray applicator configured to discharge a coating material toward a surface of a workpiece, wherein the spray applicator includes an air shaping orifice, and wherein the spray applicator is configured to generate an electric field between the spray applicator and the workpiece, and a positioning system configured to adjust a position of the spray applicator relative to the surface of the workpiece. It can further include a control system configured to regulate operation of the spray applicator and/or the positioning system to: maintain the spray applicator within a coating distance, maintain a flow rate of shaping air through the air shaping orifice, and maintain an electrical potential of the electric field.

A coating apparatus can include a spray applicator configured to discharge a coating material toward a surface of a workpiece, wherein the spray applicator includes an air shaping orifice, and wherein the spray applicator is configured to generate an electric field between the spray applicator and the workpiece, and a positioning system configured to adjust a position of the spray applicator relative to the surface of the workpiece. It can further include a control system configured to regulate operation of the spray applicator and/or the positioning system to: maintain the spray applicator within a coating distance, maintain a flow rate of shaping air through the air shaping orifice, and maintain an electrical potential of the electric field.

Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. Electric current delivered to a meniscus of the liquid metal in a quiescent state can be directed to exert a pullback force on the liquid metal. The pullback force can be sufficient to draw the liquid metal, in the quiescent state, in a direction toward the nozzle to reduce the likelihood of unintended wetting of surfaces of the nozzle between uses of the nozzle.

A fluid sprayer includes a pump and an electrostatic module configured to provide an electrostatic charge to spray fluid. The electrostatic module is electrically connected to a conductive component of the fluid sprayer, such as a fluid displacement member, fitting, cylinder, or spray tip, to charge the spray fluid via the conductive component. The fluid is electrostatically charged prior to exiting the fluid sprayer.

A fluid sprayer includes a pump and an electrostatic module configured to provide an electrostatic charge to spray fluid. The electrostatic module is electrically connected to a conductive component of the fluid sprayer, such as a fluid displacement member, fitting, cylinder, or spray tip, to charge the spray fluid via the conductive component. The fluid is electrostatically charged prior to exiting the fluid sprayer.