Provided is a microvolume liquid dispensing method in which a variable capacity passage section of a liquid passage in a microvolume liquid dispenser is pressurized from the outside and shrunk in a direction that reduces the internal capacity thereof so that a liquid that is within the variable capacity passage section is pushed toward both a downstream passage section and an up stream passage section. A microvolume of the liquid is pushed toward the downstream passage section as a result of the downstream passage section having a much larger liquid passage resistance than the upstream passage section. It is thus possible to precisely drip a microvolume liquid of a picoliter order from the tip opening of a nozzle by simple control.

A fluid sending apparatus includes a signal generator that generates a signal including a signal component that has a one-sided waveform and is composed of a rising component in a positive voltage direction, a falling component in the positive voltage direction, and a vortex ring formation time component T, and a damping component for driving for a predetermined time with a voltage less than or equal to one-half of a voltage in the positive voltage direction, the waveform of each of the signal component and the damping component corresponding to a single wave.

A fluid injector for x-ray tubes and a method to provide a liquid anode by liquid metal injection, wherein the fluid injector includes a device to inject fluid from an opening in a chamber of the device as a fluid jet generated by an arrangement to change the volume within the chamber, and includes a reservoir to store the anode material, which is fluidically connected by a pipe with the chamber of the device, where the pipe has a part formed in the fluid flow direction that is shaped to block fluid flow from the chamber to the reservoir during injection, and where the includes injecting fluid in a direction towards an electron beam and refilling the chamber with liquid metal from the reservoir.

The present invention relates to devices and methods for coating surfaces including surfaces of medical devices, in particular the coating of microprojections on microprojection arrays. The present invention also relates to print head devices and their manufacture and to methods of using the print head devices for manufacturing articles such as microprojection arrays as well as to coating the surfaces of microprojection arrays. The present invention also relates to high throughput printing devices that utilize the print heads of the present invention.

Method and apparatus are disclosed for methods and apparatus for application of washer fluid to vehicle cameras. An example vehicle includes a camera including a lens. The example vehicle includes a reservoir and a flexible housing defining a cavity fluidly coupled to the reservoir and including an outlet valve adjacent the lens. The example vehicle also includes a solenoid coupled to the flexible housing to affect a cavity pressure by flexing the flexible housing. The outlet valve opens upon the cavity pressure being greater than a predetermined threshold to spray the washer fluid onto the lens.

A painting robot which can prevent the introduction of air from the nozzles into paint during the color change of paint and filling of paint and can prevent the acceleration of wear of the pump, and sufficiently remove dissolved gas from the paint. The painting robot includes a paint supply path connected to the paint supply side of the nozzle head and a return flow path configured to recover the paint not discharged from the nozzles. Further, the painting robot includes a first filter configured to remove foreign matter in the paint and a second filter configured to separate dissolved gas from the paint. When paint is not discharged from the nozzle head, the control unit opens the on-off valve and circulates the paint to the bypass flow path.

A fluid sending apparatus includes a signal generator that generates a signal including a signal component that has a one-sided waveform and is composed of a rising component in a positive voltage direction, a falling component in the positive voltage direction, and a vortex ring formation time component T, and a damping component for driving for a predetermined time with a voltage less than or equal to one-half of a voltage in the positive voltage direction, the waveform of each of the signal component and the damping component corresponding to a single wave.

A fluid sending apparatus includes a signal generator that generates a signal including a signal component that has a one-sided waveform and is composed of a rising component in a positive voltage direction, a falling component in the positive voltage direction, and a vortex ring formation time component T, and a damping component for driving for a predetermined time with a voltage less than or equal to one-half of a voltage in the positive voltage direction, the waveform of each of the signal component and the damping component corresponding to a single wave.

A nozzle arrangement that produces an atomised spray or foam wherein the nozzle arrangement comprises a nozzle body with an inlet for a pressurized fluid into a chamber with an outlet orifice in the downstream wall and a prodder with a tapered conical tip wherein the prodder is inside of said chamber and at least part of the tip of the prodder protrudes inside the outlet orifice creating at least one circumferential gap between the prodder tip and the outlet orifice whereby the fluid spins around at least part of the prodder tip and out through the circumferential gap and produces an atomized spray or foam with a substantially full cone shape.

A nozzle arrangement connected to a source of pressurized fluid mat produces a series of fast pulsed discharges of fluid in quick succession wherein the nozzle arrangement comprises a nozzle body with an inlet for the pressurized fluid into a chamber with a downstream wall with an outlet hole in said chamber wall wherein a prodder moves between a sealed and unsealed position in said outlet hole of the chamber wall and wherein a sprung plunger that is upstream of and connected to said prodder and has a annular seal that forms a seal between said plunger and the chamber creating a mobile chamber wall upstream of the downstream wall in said chamber, simultaneously moves between a downstream and an upstream position as the chamber fills with the fluid and then returns to a downstream position as the prodder returns from an unsealed position to a sealed position while the fluid is discharged.