There is provided a holding member including: a holding unit configured to hold a package with a variable volume; and a connection unit configured to connect the holding unit and an unmanned aerial vehicle. The holding member may include a posture change unit configured to change a posture of the holding member, and a posture fixing unit for the holding unit. The holding member may include a package fixing unit configured to fix the package to the holding unit. There is provided a spraying method in which in a state in which the holding member holds the package, and the holding member holding the package is mounted on the unmanned aerial vehicle, a content of the package is sprayed from the unmanned aerial vehicle.

A release agent spray system for a vehicle that is used for removing temporary tape from pavement surfaces. The release agent spray system includes a reservoir containing a release agent, a pump for pumping release agent from the reservoir, and a handheld sprayer connected to the reservoir by a fluid conduit or tube and connected electrically to the pump. The handheld sprayer includes an activation switch for activating the pump to deliver release agent from the reservoir to the handheld sprayer.

A wastewater spray distribution apparatus is operative to distribute wastewater produced by a sewage treatment system (10) onto a ground level (22) through operation of sprayers (118, 260). The exemplary sprayers include a manifold (142, 262) that includes outlet nozzles (158, 264) that can be readily removed and replaced. The exemplary manifold further includes interior areas bounded by surfaces that slope continuously downward from the outlet nozzles to the manifold inlet to assure the draining of water therefrom. Each of the nozzles include a base (140) which includes a liquid tight jacket (208). The jacket isolates components which facilitate movement of a rotatable hub (154), from water passing through the sprayer and other contaminants. A brake is provided in each nozzle and includes a liquid lubricant in the jacket that operates to limit rotational movement produced by the thrust of water passing from the outlet nozzles to assure that the sprayer operates at the appropriate rotational speed.

A cartridge for use in a showerhead or tap is designed for dispensing a liquid, in particular water or a water-based mixture. The cartridge comprises a set of at least two nozzles arranged to create colliding jets of the liquid and thereby create a spray of droplets of the liquid, and a spray shaper for guiding the spray. An inner diameter of the nozzles is between 0.8 and 1.5 millimetres, and a throat of each of the nozzles, along which the nozzle has a constant diameter, has a length that is at least three times this inner diameter.

A cartridge for use in a showerhead or tap is designed for dispensing a liquid, in particular water or a water-based mixture. The cartridge comprises a set of at least two nozzles arranged to create colliding jets of the liquid and thereby create a spray of droplets of the liquid, and a spray shaper for guiding the spray. An inner diameter of the nozzles is between 0.8 and 1.5 millimetres, and a throat of each of the nozzles, along which the nozzle has a constant diameter, has a length that is at least three times this inner diameter.

An adapter for selectively connecting an accessory to a spray gun has an upstream connector for connecting to the spray gun, a downstream connector for connecting to accessory, a gasket located between the upstream and downstream connectors, and the upstream and downstream connectors are selectively connected together. When connected, one of the upstream and downstream connectors has a cylindrical portion at least partially inserted into another one of the upstream and downstream connectors, and a post projecting radially from the cylindrical portion. The other one of the upstream and downstream connectors has an arcuate slot being shaped and structured to receive the post of the one of the upstream and downstream connectors. A spray gun assembly has spray gun, an accessory and at least one adapter connecting the spray gun and the accessory together.

An adapter for selectively connecting an accessory to a spray gun has an upstream connector for connecting to the spray gun, a downstream connector for connecting to accessory, a gasket located between the upstream and downstream connectors, and the upstream and downstream connectors are selectively connected together. When connected, one of the upstream and downstream connectors has a cylindrical portion at least partially inserted into another one of the upstream and downstream connectors, and a post projecting radially from the cylindrical portion. The other one of the upstream and downstream connectors has an arcuate slot being shaped and structured to receive the post of the one of the upstream and downstream connectors. A spray gun assembly has spray gun, an accessory and at least one adapter connecting the spray gun and the accessory together.

A sprinkler housing assembly that defines a subterranean compartment to house the sprinkler head body, keeping it free from dirt and debris, yet safely below ground. The housing assembly has a peripherally sealed access opening through which an upper portion of the sprinkler head protrudes, thereby enabling the head to move between its inactive contracted position and its active extended position for watering the lawn. In the inactive contracted position, a user of the present invention may access the body of the sprinkler head in the enclosed compartment, to replace the entire sprinkler head, via an upper opening of the housing assembly, wherein the upper opening is adjacent or just downward to the groundlines. As a result, without digging and with only a screwdriver, the user may remove the entire sprinkler without ruining the lawn.

A sprinkler housing assembly that defines a subterranean compartment to house the sprinkler head body, keeping it free from dirt and debris, yet safely below ground. The housing assembly has a peripherally sealed access opening through which an upper portion of the sprinkler head protrudes, thereby enabling the head to move between its inactive contracted position and its active extended position for watering the lawn. In the inactive contracted position, a user of the present invention may access the body of the sprinkler head in the enclosed compartment, to replace the entire sprinkler head, via an upper opening of the housing assembly, wherein the upper opening is adjacent or just downward to the groundlines. As a result, without digging and with only a screwdriver, the user may remove the entire sprinkler without ruining the lawn.

An applicator for a syringe is provided that includes a hub configured to be disposed at least partially within a nozzle of the syringe and defining a fluid passage therethrough, with one or barbs on the hub that frictionally and sealingly engage an interior of the nozzle in a manner minimizing void space associated with waste of deliverable material, and an applicator tip extending distally from the hub. The barb(s) may have varying diameters in order to enable the applicator to be engaged and utilized with syringes having different diameter nozzles. Further the fluid passage through the hub and applicator tip is dimensioned to minimize the volume of material that is retained within the applicator after use, thereby increasing the volume of material that can dispensed from the syringe for use in a procedure or procedures and minimize waste.