An example of a system may include a receiving-side mating interface, including a printing substance inlet port encompassed by a receiving-side gasket material; and a dispensing-side mating interface including a printing substance dispensing nozzle, wherein the printing substance dispensing nozzle includes a dispensing-side gasket material slide-able along an internal face of the dispensing-side mating interface to seal an orifice of the printing substance dispensing nozzle within the dispensing-side mating interface and a window through the dispensing-side mating interface, wherein the dispensing-side gasket material slides against the receiving-side gasket material through the window when the outlet of the dispensing nozzle is rotated within the dispensing-side mating interface.

An example of a device (100) may include a valve body (108). The device may include a printing substance transfer window (122) through the valve body (108). The device (100) may include a printing substance dispensing nozzle (110) rotatable within the valve body (108) between a first orientation with an orifice of the printing substance dispensing nozzle (110) facing an internal face of the valve body (108) and a second orientation with the orifice (126) of the printing substance dispensing nozzle (110) facing the printing substance transfer window (122). The device (100) may include a dispensing-side gasket material (132) slideable against the internal face of the valve body (108) when rotating the printing substance dispensing nozzle (110) between the first orientation and the second orientation.

A spray gun shower head includes a shower body, a switching body and a reset assembly. The shower body has a water intake path and at least one first and second water outflow paths. The switching body is movable between first and second switch positions and configured to switch the water intake path to be communicated with the first or second water outflow path. The reset assembly includes at least one reset member and a push block. The second water outflow path is hidden in the shower body through a cover. The cover is pushed against by an opening structure to be opened. The reset member is disposed on the shower body, and one end thereof cooperates with the push block. The push block is disposed on the switching body and rotates toward the second switch position along with the switching body to press against the reset member.

A valve including a body having an inner central orifice and a chamber, a piston formed by a rod and by a head mounted in the chamber, the rod extending outside the body and moving in a bore of an application system. The valve includes a first sealing device around the rod on one side of the valve where the rod extends outside the body, part of the chamber being filled with a pressurized control fluid to obtain movement of the piston against the force of a spring housed in the body. The valve includes a second sealing device around the rod, between the first sealing device and the chamber. The valve includes a vent duct in the rod that communicates with the inner central orifice between the first and second sealing devices and emerges in the open air or in part of the chamber communicating with the open air.

Valve for a system for applying a covering product, including projecting or recessed shapes on a peripheral part, configured to cooperate with projecting or recessed shapes of a dedicated mounting and dismounting tool, these projecting or recessed shapes of the valve being configured to transmit a rotational movement to the valve, and to be secured to the tool. The projecting or hollow shapes of the valve include a first peripheral profile having at least one planar surface, and a second peripheral profile located behind the first profile relative to an outer end of the valve. The second profile has at least one first planar surface aligned with the planar surface of the first profile, and at least one second planar surface angularly offset relative to the planar surface of the first profile, such that the second planar surface of the second profile forms a shoulder relative to the first profile.

An apparatus for dispensing fluid includes a fluid source; a nozzle having an inner layer and an outer layer, the inner layer defining a bore in fluid communication with the fluid source; and a plurality of pins each moveable to be in physical contact with the outer layer, wherein the plurality of pins is operable to apply a force towards the outer layer to adjust a cross-section of the bore.

A pipe-repair tool is disclosed. The pipe-repair tool includes a first chamber to hold a first pressurized sealant and a valve to selectively allow the sealant to flow from the chamber into the interior of a pipe to be repaired. The tool may include a second chamber to hold a second pressurized sealant when using a two-part sealant, in which case the first sealant and the second sealant flow through a mixing chamber when flowing from the first and second chambers to the interior of the pipe. The valve may be a mechanical valve that is opened by moving the tool relative to the pipe to be repaired. The valve may be an electrically controlled valve that is opened with an electrical signal.

Provided is a fluid supply unit (2), a micro-droplet ejection driving device (1) and a micro-droplet ejection generating device (4). The fluid supply unit (2) comprises a fluid ejecting portion (210) and an energy conducting sheet (220), the fluid ejecting portion (210) and the energy conducting sheet (220) constituting at least part of a container wall of a container to be injected with a fluid; the energy conducting sheet (220) is used in close contact with an end surface of a piezoelectric actuator (120) and is driven to generate vibrations, thereby causing the fluid to be ejected by means of the fluid ejecting portion so as to form a directional micro-droplet stream. The micro-droplet ejection driving device (1) comprises: a housing (110) in which the fluid supply unit (2) may be accommodated; the piezoelectric actuator (120), which is fixed on the housing (110) and which is configured to be in close contact with an outer wall of the fluid supply unit (2) and to drive the outer wall to vibrate. The micro-droplet ejection generating device (4) comprises the fluid supply unit (2) and the micro-droplet ejection driving device (1).

A filling device is provided, including a pump and a liquid transferring handle. The liquid transferring handle includes a grip portion, an inlet portion, an outlet portion which is in communication with the inlet portion, a channel which is in communication between the inlet portion and the outlet portion, and a window through which an interior of the channel is viewable. The inlet portion is detachably connected and in communication with the pump.

A discharge container 1 includes a container body having a discharge face 13, on which a discharge hole 15 is formed, a cylinder part including a discharge space 2 in communication with the discharge hole 15 inside the container body, a piston 3 movable between a first position and a second position, the second position being farther than the first position from the discharge face in the discharge space 2, and a plurality of storage portions 5a to 5e for storing contents, wherein a plurality of inlet holes respectively corresponding to the plurality of storage portions 5a to 5e are formed in an inner wall of the discharge space 2, wherein, when the piston 3 is at the second position, the plurality of inlet holes 22a to 22e communicate with the discharge space 2 between a top face of the piston 3 and the discharge face, and the contents are ready to flow into the discharge space 2 from the plurality of inlet holes 22a to 22e, and wherein, when the piston 3 is at the first position, the plurality of inlet holes 22a to 22e are closed by the piston 3.