Abstract: A chemical mixing device. The device includes a flow generator operative to provide at least two streams of chemicals and a mixing chamber, including at least two inlets adapted to receive the at least two streams of chemicals and an outlet through which a mixture of the streams of chemicals is ejected from the mixing device. The mixing chamber has an open state in which the chemicals are mixed and a closed state in which the volume of the mixing chamber is less than a fifth of the open state volume.

Abstract: A system for applying coatings and more specifically paint coatings is provided that combines fluid stored in separate reservoir containers prior to expelling the mixture for application. The reservoirs may be comprised of collapsible and disposable bags that eject its fluid upon activation of an actuator or expanding bladder. The fluid components are combined and blended together in a mixer that is positioned between the reservoirs and a nozzle.

Abstract: A cartridge for a handheld electrohydrodynamic (EHD) spraying device. The cartridge is disposable, and can contain therapeutic products. The device includes a wetted lead screw with a compliant seal, where the placement of the seal relative to the screw inhibits leakage during both cartridge use and storage. A frame disposed within the cartridge acts as a load-transferring mechanism for the weight of the cartridge to a handle of the spraying device.

Abstract: A locking tensioning mechanism for a miniaturised high pressure generator is disclosed, which mechanism will allow delivery of a set volume of a liquid, and the volume to be delivered by a high pressure generator can be altered subsequently by adjusting one of the stops of the spring component, which locking tensioning mechanism may be used in a high pressure generator for producing an inhalable aerosol or in a needleless injector for injecting a volume of a liquid into animal or plant tissue.

Abstract: A cartridge for a handheld electrohydrodynamic (EHD) spraying device and a spraying device incorporating the cartridge. The cartridge is disposable, and can contain therapeutic products. The device includes a wetted lead screw with a compliant seal, where the placement of the seal relative to the screw inhibits leakage during both cartridge use and storage. A frame disposed within the cartridge acts as a load-transferring mechanism for the weight of the cartridge to a handle of the spraying device.

Abstract: In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a direction along a longitudinal axis of the feed screw to enhance consistency in material flow through the cartridge. The feed screw is preferably driven by a closed-loop servo motor to achieve high-performance dispensing resolution. The assembly is preferably compatible with fixed-z and floating-z cartridges. A optional vented dispense tip, in combination with the fluid pump, allows for repeatable deposit of fillet patterns while maintaining optimal consistency.

Abstract: A locking tensioning mechanism for a miniaturised high pressure generator is disclosed, which mechanism will allow delivery of a set volume of a liquid, and the volume to be delivered by a high pressure generator can be altered subsequently by adjusting one of the stops of the spring component, which locking tensioning mechanism may be used in a high pressure generator for producing an inhalable aerosol or in a needleless injector for injecting a volume of a liquid into animal or plant tissue.

Abstract: Liquid spraying equipment, for example for paint, adhesives and chemicals, comprises a spray gun (30) having a luid outlet (53) to which liquid is pumped from a container, the outlet being adjaceent a pressurized air or other fluid outlet (34) to entrain the liquid and thereby atomize it. The liquid pump is housed in a separate unit of which a removable liquid container can be sealingly coupled. The unit also contains a pump to deliver pressurized air to a chamber with a hose ocnnection to the spray gun and with a tapping to the liquid container so as to pressurize the liquid and assist the liquid pump to deliver it to the spray gun through a pipe, possibly within the pressurized air hose. The flow of liquid through the outlet is regulated by a pin (38) or the like slidably mounted in a bore (35). A trigger mechanism (36) retracts the pin from the outlet against the force of a restoring spring (40). An adjustable limit stop (49) determines the degree of opening of the liquid outlet.

Abstract: An electrostatic spraying device being configured and disposed to electrostatically charge and dispense a product from a supply to a point of dispersal. This device has a reservoir configured to contain the supply of product and a nozzle to disperse the product. A channel is disposed between the reservoir and the nozzle, wherein the channel permits the electrostatic charging of the product upon the product moving within the channel. A positive displacement mechanism is used to move the product from the reservoir to the nozzle. A portion of the high voltage electrode being disposed between the reservoir and the nozzle is used to electrostatically charge the product within the channel at a charging location. A mixing mechanism may be disposed between the reservoir and the nozzle to reconstitute any product which may have separated. The high voltage contact may be spring biased in direction towards the high voltage electrode.

Abstract: A generator/dispenser for mono-dispersed aerosol, with droplet size precisely controlled by a stepper motor and a nozzle array having a great number of operational micro-vias, and with fluid volume dosage control. A specified dose is delivered over an accurately controlled interval of time, by decrementing the volume of a fluid reservoir upon each of a specified number of control pulses to a stepper motor, which moves a ball screw linear actuator with great precision on each control pulse. The reservoir is closed at the aerosol delivery position by a nozzle array, which is a thin sheet with myriad micro-via holes. The micro-vias are of the same dimensions and orientation, producing for a medical inhaler the desired micro-droplet volume, for example the volume of a 3-.mu.m diameter droplet from each micro-via, for each pulse.

Abstract: Nozzle (10) for showers with a sprayer (30) comprising a mixing chamber (51) in which is placed a soluble toilet product in tablet form (80), replaceable, said chamber being connected to said nozzle (10) by a pair of threads on the sides which, on rotating said sprayer (30) in one direction or the other, cause the chamber to move axially between a washing position when water passes through said mixing chamber (51) and dissolves the toilet product (80), and a rinsing position when the water passes through an annular chamber (32) that surrounds said mixing chamber (51).

Abstract: The present invention relates to a nozzle assembly for dosing liquid while preventing spillage or dripping between the dosing. This nozzle assembly includes a dosing chamber (4) has an inlet (21), a piston housing wherein a piston plunger (5) is disposed, and an outlet (22) communicating with a distribution channel (10), a first one-way valve to open the inlet (21) when the dosing chamber (4) is being filled and to close the inlet (21) when a dose is being emptied out from the dosing chamber (4) into the distribution channel. The nozzle assembly furthermore comprises a second one-way valve (3) and a pressure release valve (23) to open a distribution channel outlet (27) when pressurized to a desired pressure. This pressure release valve (23) has an elastic cover (19) tightly fitted around the distribution channel outlet (27) and a distribution chamber having one or more needles (13) through which the liquid is dosed.

Abstract: A dispensing device which includes a container for liquid to be dispensed, an outlet nozzle including a device to break-up a flow of liquid under pressure into a spray, a piston for forcing liquid out of the container under pressure and through the nozzle, and a drive device for moving the piston a predetermined distance to dispense a predetermined quantity of liquid from the container. The drive device includes a dose selector for selecting the predetermined amount of liquid and a plunger for moving the piston, movement of the dose selector determining subsequent movement of the plunger. The device is particularly suited to nasal administration of liquid.

Abstract: A storage tank for a liquid product such as a coating product to be sprayed comprises an internal piston dividing the storage tank into a first chamber receiving the coating product under pressure and a second chamber receiving a pressurized actuator fluid. The piston is mechanically coupled to a step mode actuator.

Abstract: The method and apparatus for atomizing and spraying liquid substances serves in particular to produce clouds for inhalation purposes. The liquid substance to be atomized is compressed to such an extent that it decreases in volume and that it is then explosively released into the normal atmosphere. Due to its high internal pressure, the liquid substance bursts into extremely small particles.

Abstract: This invention is directed to a liquid storage container. More particularly, this invention is directed to a liquid storage container that can be connected or attached to a spray pump which comprises two separate chambers to hold liquid components, each chamber having a take-up tube which leads to a mixing chamber contained within a movable member attached to a movable external selector, the member having openings therein, wherein, when the external selector is moved, the movable member attached thereto moves in a manner such that the ratio of the quantities of liquid components from the chambers varies.