An electro-hydraulic actuation system for a sprayer comprises a hydraulic system, a hydraulic actuator, an electric actuator and a sprayer. The hydraulic system is for pressurizing a hydraulic fluid. The hydraulic actuator is powered by the hydraulic system. The electric actuator controls actuation of the hydraulic actuator by the hydraulic system. The sprayer is actuated by the hydraulic actuator.

A battery powered fluid sprayer includes a shelter that the battery is mounted in to provide power to the electric components of the sprayer. The shelter protects the battery from falling fluid droplets. The shelter extends above the battery and projects outward laterally and longitudinally to protect the battery. The battery can move vertically downward to dismount from the fluid sprayer.

A method of monitoring agricultural spray performance includes spraying a fluid from spray nozzles, sensing spray parameters (e.g., droplet size, a flow rate, an application density, or a pressure of the fluid) for the spray nozzles, receiving the spray parameters, generating an average spray parameter value, determining a minimum spray parameter value and a maximum spray parameter value, and displaying the average, minimum, and maximum spray parameter values. Other methods include spraying a fluid from a spray nozzle, sensing a spray parameter for the spray nozzle, detecting that the spray parameter has exceeded a pre-defined threshold value, displaying an alarm, and ceasing spraying the fluid from the spray nozzle. A user interface continues to display the alarm after the act of ceasing spraying the fluid. Related systems and other methods are also disclosed.

A fluid dispensing device includes a housing and a reciprocating piston fluid pump coupled to the housing. The reciprocating piston fluid pump includes a piston disposed within a cylinder. The piston is configured to pressurize at least one pumping chamber. A motor is coupled to the housing and connected to the reciprocating piston fluid pump to actuate the piston. A wobble assembly connects the motor to the piston of the reciprocating piston fluid pump. A spray tip connected to an outlet of the at least one pumping chamber.

A paint sprayer includes an end bell, a motor connected to the end bell, a pump drive connected to the end bell, a pair of protrusions attached to an extending from the end bell such that each protrusion is cantilevered from the end bell, and a pump assembly comprising a pair of mounting holes and containing a piston. The pair of mounting holes is adapted to receive and slide onto the pair of protrusions to mount the pump assembly on the end bell as well as slide off of the pair of protrusions to remove the pump assembly from the end bell. The pump drive is configured to covert rotational motion output by the motor to reciprocal motion. The pump assembly is configured to pump paint when reciprocated by the pump drive while mounted on the end bell.

A cartridge acting as a dispenser for liquid treatments of a human or animal body is U shaped or hoop shape. The cartridge has a container containing a liquid treatment which when required to be dispensed is ejected through one or more nozzles projecting through the wall of the cartridge into the centre of the U or of the hoop. A base is provided for cartridges, the base controlling timing and quantity of treatments.

A device configured to jet one or more droplets of a viscous medium may include a housing having an inner surface at least partially defining a jetting chamber configured to hold the viscous medium, and a flexible jetting nozzle. The flexible jetting nozzle may include a flexible conduit extending between an inlet orifice in an inner surface to an outlet orifice in an outer surface. The device may cause an increase of internal pressure of viscous medium in the jetting chamber to force one or more droplets of viscous medium through the flexible conduit and through the outlet orifice. The flexible jetting nozzle may include a flexible material. The flexible jetting nozzle may deform, to cause a cross-sectional area of the flexible conduit to dilate, in response to the increase of the internal pressure of the viscous medium in the jetting chamber.

An unmanned aerial vehicle (UAV) includes a sprayer configured to generate a pressurized fluid flow and a nozzle configured to receive the pressurized fluid from the sprayer and to generate a spray fan to apply the fluid to a surface. The UAV includes sensors and a control unit to control both flight of the UAV and spraying by the sprayer. The fluid can be stored onboard the UAV in a reservoir or can be remotely stored and pumped to the UAV. The UAV control unit can be preloaded with a spray plan and a flight plan, or the UAV can be controlled by a user.

A device for dispensing a fluid drop-by-drop can include a fluid connector to supply the fluid to be dispensed, a pump which is fluidically connected to the fluid connector, an outlet nozzle which is fluidically connected to the pump, an actuating element, and a control unit. When the actuating element is actuated, the control unit activates the pump which pumps the supplied fluid to the outlet nozzle for dispensing drop-by-drop. The outlet nozzle has an outlet opening and a fluid channel which extends as far as the outlet opening and which, in the direction of the fluid from the pump as far as the outlet opening, has a first channel portion with a first cross-sectional surface and a second channel portion with a second cross-sectional surface adjoining the first channel portion. The second cross-sectional surface can be smaller than the first cross-sectional surface.

A dispenser capable of dispensing a fluid via a vertically-oriented piezo device comprises a reservoir in the form of a replaceable cartridge containing a fluid to be dispensed, a planar piezo element having front and rear surfaces and which in use is oriented with its plane vertical and which is drivable to vibrate and thereby dispense fluid from the front surface, and a pump to draw a predetermined amount, or dose, of fluid from the reservoir and to drive the dose of fluid at a predetermined above-atmospheric pressure to the rear surface of the piezo element for dispensing.