Disclosed is a connecting device. The disclosed connecting device includes a connecting unit whose inside is penetrated and opened and closed according to rotation of a rotor provided therein, and an opening/closing unit that is rotatably coupled to the connecting unit and opens and closes the inside of the connecting unit by rotating the rotor, when being rotated with respect to the connecting unit.

A sprinkling device includes a grip, a rotary seat sealingly mounted onto the grip and a sprinkling head sealingly and rotatably mounted onto the rotary seat. The sprinkling device is used as a spray gun when an axis of sprinkling head co-axially corresponds to that of the rotary seat or the axis of sprinkling head is parallel to that of the rotary seat. The sprinkling device is used as a sprinkler when the axes of the sprinkling head and the rotary seat form an angle, wherein the grip is used as a platform and the sprinkling head upwardly sprays water.

Disclosed is a connecting device. The disclosed connecting device includes a connecting unit whose inside is penetrated and opened and closed according to rotation of a rotor provided therein, and an opening/closing unit that is rotatably coupled to the connecting unit and opens and closes the inside of the connecting unit by rotating the rotor, when being rotated with respect to the connecting unit.

A fluid sprayer includes a spray gun that is configured to output a spray of fluid for application on a substrate. A trigger of the spray gun is operatively connected to a controller to control actuation of a pump that drives the spray fluid to the spray gun. A solenoid is connected to a spray valve of the spray gun to actuate the spray valve open to cause spraying by the fluid sprayer.

A fluid sprayer includes a spray gun that is configured to output a spray of fluid for application on a substrate. A trigger of the spray gun is operatively connected to a controller to control actuation of a pump that drives the spray fluid to the spray gun. A solenoid is connected to a spray valve of the spray gun to actuate the spray valve open to cause spraying by the fluid sprayer.

A fuel injector for a gas turbine engine includes an injector body having a feed arm with a nozzle body mounted thereto. A fuel conduit fluidly connects a fuel inlet portion of the feed arm to a fuel circuit in the nozzle body to form a fuel path through the injector body and an insulative gap is defined between the fuel conduit and an inside of the feed arm wall to thermally insulate the fuel path of the injector body. An aperture through the feed arm wall provides fluid communication between the insulative gap and ambient conditions existing on an outside of the feed arm wall.

A dosing dispenser system and a dosing dispenser include a slidable control configured to allow a user to select a desired mixing ratio for a product contained in a container attached to the dosing dispenser with a transport medium, such as water, flowing through the dosing dispenser.

A sprinkling device includes a grip, a rotary seat sealingly mounted onto the grip and a sprinkling head sealingly and rotatably mounted onto the rotary seat. The sprinkling device is used as a spray gun when an axis of sprinkling head co-axially corresponds to that of the rotary seat or the axis of sprinkling head is parallel to that of the rotary seat. The sprinkling device is used as a sprinkler when the axes of the sprinkling head and the rotary seat form an angle, wherein the grip is used as a platform and the sprinkling head upwardly sprays water.

A dust suppression system has one or more fluid dischargers configured to discharge a fluid capable of suppressing generation of dust to a work area of a building by remote operation. The fluid discharger includes a discharge nozzle configured to discharge the fluid; a first swivel joint structure including a first rotating-side body connected to and supporting the discharge nozzle and a first fixed-side body rotatably supporting the first rotating-side body; a first electric linear motion mechanism including a first support part and a first movable part supported by the first support part in a linearly movable manner; and a first rotation mechanism configured to convert linear motion of the first movable part into rotational motion to rotationally displace the first rotating-side body. The dust suppression system can further reduce power consumption as well as can accurately discharge a fluid from a fluid discharger to a predetermined work area.

A backpressure booster for a nozzle assembly for a firefighting apparatus is disclosed. The backpressure booster includes a housing, a flow restrictor within the housing, and flow conditioner within the housing and positioned downstream from the flow restrictor, where the flow conditioner is configured to direct fluid radially outward towards an inner surface of the housing.