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 saddle seal assembly for a high-pressure airless spray nozzle having a spray tip includes a metal sealing sleeve and a cylindrical elastic seal. The metal sealing sleeve may include a first saddle-shaped semi-cylinder surface closely matching with an outer surface of the spray tip to form an outer hard sealing structure. The cylindrical elastic seal may include a second saddle-shaped semi-cylinder surface closely matching with the outer surface of the spray tip to form an inner flexible sealing structure. A first end portion of the cylindrical elastic seal is configured to be inserted into the metal sealing sleeve, and the first saddle-shaped semi-cylinder surface and the second saddle-shaped semi-cylinder surface are configured to be spliced to form a continuous saddle-shaped semi-cylinder surface, to thereby seal a stepped inlet hole of the high-pressure airless spray nozzle.

A spray tip for a fluid applicator includes a stem configured to be inserted into the fluid applicator. The stem includes a stem pre-orifice portion and an insert receiving portion. The spray tip includes a pre-orifice insert having an inlet and an outlet. The pre-orifice insert is disposed within the insert receiving portion and disposed against a rearward shoulder of the stem.

In a first aspect, the present invention is directed to a reversible hydraulic nozzle that includes a front body section, which includes a hydraulic orifice, and a rear body section, which includes a rear opening. The reversible hydraulic nozzle is configured to be in fluid communication with an outlet valve of a hydraulic device in each of a dispensing orientation and a cleaning orientation. In a second aspect, the present invention is directed to a hydraulic device that includes an outlet valve and the reversible hydraulic nozzle of the first aspect of the present invention. The present invention is further directed to using a needle-free injection device that includes the reversible hydraulic nozzle of the first aspect of the invention to perform a method of injection and a method of cleaning the reversible hydraulic nozzle.

A method of generating a building assembly that includes spraying a coating material onto a plurality of pieces of substrate disposed on a first assembly face. The spraying includes spraying the coating material onto the plurality of pieces of substrate via a sprayer configured to apply the coating material to a target surface via a nozzle coupled with a mobile storage container storing the coating material, the coating material impregnating voids of the substrate. The method also includes allowing the coating material impregnating the voids to dry and harden and become rigid to generate the building assembly.Attac

A coating system for applying a coating to a substrate that can be part of a wall assembly. The system includes a positioning stage and an end effector coupled at a distal end of the positioning stage, the end effector configured to apply coating to a target surface. The system can further include a computing device executing a computational planner that: generates instructions for driving the end effector and positioning stage to perform at least one coating task that includes applying coating, via the coating the end effector, to one or more substrate pieces, the generating based at least in part on obtained target surface data; and drives the end effector and positioning stage to perform the at least one coating task.

A spray gun includes a valve cartridge configured to be axially installed and removed as a single piece. The valve cartridge includes at least one engagement member to prevent rotation of valve cartridge within the gun body of the spray gun.

A fluid application system includes a pump unit configured to pump a fluid to a fluid applicator. The fluid application system includes a sensor configured to sense a motion made by a user and generate a sensor signal indicative of the sensed motion. The fluid application system also includes a control system configured to identify a gesture based on the sensor signal and control the fluid application system based on the identified gesture.

A ball for a hydraulic component comprises a spherical body provided with at least one first through channel, which extends along a first axis; and at least one flow changer element arranged along the first through channel.

A spray tip comprises a tip body, a tip piece, and a pre-orifice piece. The tip body has a fluid channel along a channel axis (A.sub.C). The tip piece is disposed within the fluid channel, and has a stepped, narrowing passage that terminates in an outlet orifice. The pre-orifice piece has an inlet passage, and is disposed within the fluid channel, abutting and immediately upstream of the tip piece. The pre-orifice piece and the tip piece together define a turbulating chamber therebetween.