A liquid discharge head for controlling discharging of liquid, the liquid discharge head including a valve body configured to be movable, and to be pressed towards a discharge port from which the liquid is discharged; and a recessed portion provided in the valve body at a position facing the discharge port.

The head (1) for the three-dimensional printing of molten metal comprises a hollow body (2) comprising: a first chamber (3) adapted to contain a molten metal (4) in which a dispensing opening (5) is formed for the dispensing of the molten metal (4); a second chamber (9) adapted to contain an operating fluid (10) and connected to pressure variation means (11) adapted to define a pressure difference between the first chamber (3) and the second chamber (9); and a dispensing assembly (12, 13) comprising a flexible laminar element (12) separating the first chamber (3) and the second chamber (9), the laminar element (12) being deformable by means of a pressure variation in the second chamber (9) and the deformation of the laminar element (12) determining the outflow of the molten metal (4) from the dispensing opening (5).

The present disclosure provides a flow control valve for controlling the flow of a cleaning media, such as controlling the flow of cleaning media to a nozzle positioned to distribute the cleaning media to a vehicle surface. The flow control valve includes a plunger and a flexible diaphragm which operate to open and close the a fluid passage through the valve. Vehicles and systems incorporating a flow control valve are also provided.

A liquid ejection device includes: a nozzle including a nozzle opening through which a liquid is ejected; a liquid transfer tube through which the liquid is transferred to the nozzle; and a first tube with the nozzle and the liquid transfer tube being provided therein, having a first end and a second end, and having a first opening at the first end, in which the nozzle opening is positioned closer to a second end side than the first opening of the first tube, and when a position where the liquid ejected from the nozzle becomes a droplet is set as a droplet formation position, and a distance from the nozzle opening to the droplet formation position is set as a droplet formation distance, a distance between the nozzle opening and the first opening is equal to or greater than the droplet formation distance.

A pushing-dispensing and/or dosing element for dispensing of medium, in particular Composite Heavy Fluid Compound (CHFC), solves the technical problem of implantation of avoiding and/or limiting sliding and/or moving parts, exposed to the heavy medium, such as CHFC, thereof by using a flexible cartridge that behaves one way during the pushing of the CHFC, and another way during pumping of said CHFC out of the tank in which it is held.

Fluid delivery devices and methods are described, where the device may comprise a piezoelectric actuator operatively coupled to an ampoule with fluid, under a preloading force. The ampoule may comprise a thin-walled thermoplastic package which includes one or more apertures positioned on the wall of the ampoule. The piezoelectric actuator may be configured to clamp at least partially around the circumference of the ampoule and apply oscillations to its wall. The oscillations, typically in ultrasonic frequency, produce cycles of acoustic pressure in the fluid, leading to ejection of the fluid droplets or streams from the apertures.

The present application provides a coater and a coating method for enhancing the coating quality by improving smoothness of a mixed part where the coating position in the previous scan overlaps the coating position in the next scan. The coater includes a robot arm configured to move a nozzle head unit by driving arms via an arm driving mechanism and a coating control unit configured to control driving of the nozzle driving mechanism and driving of the arm driving mechanism to execute coating on the coating object; the coating control unit performs coating by forming, in segmented coating surfaces formed by each scanning of the nozzle head unit, a normal coating region coated with a target coating film thickness and an overlapping coating region coated with a spray amount of the paint less than the normal coating region; and the coating control unit performs a overlapping coating control by mixing the overlapping coating region in the previous and next scans and taking the coating film thickness of the mixed overlapping coating region as the target coating film thickness to perform coating.

An oral care appliance comprises: a fluid delivery system for producing discrete fluid bursts by means of a pump (130), a regulator (132) regulating liquid in a pressurized liquid tank (134) delivered via a valve (140) through a fluid delivery path (123) in an outlet member (124), directed to a nozzle assembly (126) from which the resulting fluid bursts are directed to the teeth.

Multi-dose ocular fluid delivery devices are provided. Aspects of the fluid delivery devices include a fluid package and an actuator. The fluid package includes a reservoir of an ophthalmic formulation, an aperture and a valve member for sealing the aperture when fluid is not being ejected therethrough. The actuator is configured to operate the valve member so as to at least reduce, if not prevent, ingress of outside materials or contaminants into the reservoir, such that the ophthalmic formulation present in the reservoir does not require a preservative (e.g., where a preservative-free ophthalmic formulation is present in the reservoir). Also provided are methods of using the devices in fluid delivery applications, as well as a kit that includes components of the devices.

The appliance includes a jet source of fluid, and a nozzle assembly through which the fluid is directed and then out for application to the teeth. A flow interrupter assembly is mounted within the nozzle assembly, such that the interrupter assembly is responsive to the fluid flow to produce momentary successive interruptions of the fluid flow by the action of the interrupter assembly moving from an original position to a flow interrupting position and then returning to its original position as the flow decreases and then is interrupted, due to the fluid flow itself, resulting in a cyclical perturbation in the fluid flow from the nozzle, by flow action alone.