A dispenser is disclosed that includes a pump having a pump chamber that receives a fluid, a pulsation dampener, and a discharge conduit. The pulsation dampener has a dampener housing with an interior volume and a dampener housing opening. A spring biased movable piston is located in the interior volume of the pulsation dampener and defines a variable volume headspace between the piston and the dampener housing opening. The discharge conduit provides fluid communication between each of an outlet of the pump chamber, the dampener housing opening, and a nozzle such that, when the pump is activated, at least a portion of fluid from the outlet of the pump chamber flows within the discharge conduit to the dampener housing opening. The dispenser is configured to, when the pump is activated, emit a substantially constant stream of fluid from the nozzle for at least one second.

A painting robot capable of reducing the influence of pressure fluctuations when paint is discharged or stopped. The painting robot includes a robot arm having a painting head unit attached to its tip, a paint supply mechanism provided between robot arm and painting head unit; and a control unit. The paint supply mechanism includes a paint circulation channel; paint transfer means and regulating valves provided in the middle of the paint circulation channel. The control unit is configured with a feedback control unit that calculates a pressure calculation value for executing feedback control .

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, a gas flow control system for achieving improved transient response in apparatuses for controlling gas flow is disclosed. Specifically, by providing a command to an apparatus to deliver a predetermined mass flow rate at a future turn on time, the apparatus is able to pre-pressurize a P1 volume so that the response time of the apparatus is no longer dependent on the speed of the apparatus's control valves and the limitations of the control loop.

A system and method for calibrating an irrigation system to account for variations in flow rates, motor operating parameters, and other parameters caused by field elevation changes, pipe friction losses, water emitter nozzle wear, pressure-regulator inaccuracies, and other factors. A calibration map is created to account for the flow rate variations or other parameters and then consulted to control operation of the irrigation system.

An agricultural irrigation system and method for irrigating a field includes a water supply pipe supported by a wheeled support or tower. The irrigation system can move in an oscillating fashion across the field while dispersing water. The irrigation system is advanced in a forward direction a first distance, reversed in a backward direction a second distance that is less than the first distance, then readvanced in a forward direction. The system can include a manifold connected to the water supply pipe. The manifold includes drop lines to supply water to a crop below the manifolds. Existing irrigation systems can be retrofitted with the manifold and drop lines.

Dispensers are disclosed that are adapted to be coupled to a reservoir to dispense a fluid contained in the reservoir. A dispenser includes a pump having a pump chamber, an intake conduit, a discharge conduit, and a pulsation dampener. The pulsation dampener includes a housing with an interior volume and an opening. Further, the pulsation dampener includes a spring biased movable piston located in the interior volume and defines a variable volume headspace between the piston and the opening of the pulsation dampener, the opening being in fluid communication with the discharge conduit.

A water stream stop valve for sprinkler, comprising: a tube body; an annular cover; multiple securing units; and a drainage body having a hole at the center is arranged above the tube body by multiple support plates; whereby water stream stop valve is applied in a pop-up sprinkler, wherein the pop-up sprinkler includes: a main body; an expansion pipe, and having a stop member arranged at top internal diameter thereof; a spray head; and the water stream stop valve is arranged inside the expansion pipe and below the spray head; When the spray head falls off spray head, the water stream stop valve will be pushed up to the top of the expansion pipe and stop at the stop member for avoiding the overflow of water, maintaining the spraying at the original area, and delivering a service indication stream.

A system for controlling a ground speed of an agricultural sprayer includes a speed setting device for commanding a selected ground speed of the sprayer when operating within a speed-range mode associated with a ground speed range. The speed setting device is movable across a plurality of positions, with each position being associated with a different ground speed within the ground speed range. A maximum range speed of the ground speed range is lower than a maximum ground speed of the sprayer. As such, the system includes a speed override input device for commanding that the ground speed of the sprayer be increased to the maximum ground speed. When an override input is received from the speed override input device, the computing system controls the operation of a sprayer drive system to increase the ground speed of the sprayer from the selected ground speed to the maximum ground speed.

An agricultural sprayer includes a purge tank, a nozzle configured to dispense an agricultural fluid onto an underlying field, and a downstream valve configured to selectively permit the air from the main fluid conduit to flow to the nozzle. A computing system is configured to initiate a purging operation to purge the agricultural fluid present within the nozzle and, upon receipt of the input, control an operation of a main valve such that the main valve is moved to an opened position to allow the air to flow through a main fluid conduit. In addition, the computing system is configured to monitor a first air pressure associated with the purge tank and a second air pressure associated with the nozzle. Furthermore, the computing system is configured to control an operation of the downstream valve during the purging operation based on the monitored first and second air pressures.

An agricultural sprayer includes an actuator configured to adjust the position of a boom assembly of the sprayer relative to a frame of the sprayer. A computing system is configured to determine the operating parameter of the sprayer at a current time based on received sensor data. Moreover, the computing system is configured to anticipate when the boom assembly will move relative to the frame in a fore/aft direction at a future time based on the determined operating parameter, with the fore/aft direction being parallel to a direction of travel of the agricultural sprayer. In addition, when it is anticipated that the boom assembly will move, the computing system is configured to control the operation of the actuator before the future time such that movement of the boom assembly relative to the frame is reduced at the future time.