A pop-up emitter comprising a base defining a circular bore along a central axis. The base further defines a circular opening at a distal end of the bore. A hub is provided, defining an aperture, positioned in the center of the opening. A circular cap is provided, sized to fit inside the opening, the cap including a spike extending perpendicular to the cap from the center of the cap. The spike resides movably within the aperture such that the cap is movable between a closed condition in which the opening is closed, and an open condition in which the opening is open.

A pop-up emitter comprising a base defining a circular bore along a central axis. The base further defines a circular opening at a distal end of the bore. A hub is provided, defining an aperture, positioned in the center of the opening. A circular cap is provided, sized to fit inside the opening, the cap including a spike extending perpendicular to the cap from the center of the cap. The spike resides movably within the aperture such that the cap is movable between a closed condition in which the opening is closed, and an open condition in which the opening is open.

A method for shutting off water that is applied to a water outlet device, which comprises enabling a volume of a variable chamber to increase to form a negative pressure chamber to suck residual water in a water outlet chamber into the negative pressure chamber by releasing negative pressure at a connection of the variable chamber and the water outlet chamber when the water is shut off. A method for shutting off water that is applied to a water outlet device, which comprises enabling a water shut-off sealing member to hermetically seal a connection of a water outlet hole and a water outlet chamber by a volume of air in the water outlet chamber of the water outlet device increasing to generate negative pressure when the water is shut off. A water outlet device is provided.

A method for shutting off water that is applied to a water outlet device, which comprises enabling a volume of a variable chamber to increase to form a negative pressure chamber to suck residual water in a water outlet chamber into the negative pressure chamber by releasing negative pressure at a connection of the variable chamber and the water outlet chamber when the water is shut off. A method for shutting off water that is applied to a water outlet device, which comprises enabling a water shut-off sealing member to hermetically seal a connection of a water outlet hole and a water outlet chamber by a volume of air in the water outlet chamber of the water outlet device increasing to generate negative pressure when the water is shut off. A water outlet device is provided.

Apparatus is provided to proportionally actuate a valve, furthermore control actuation speed and/or torque. The valve can be actuated manually via an input signal provided by a plurality of controllers. The device has sensory control, wherein sensors is connected in conjunction with the variable speed valve(s) and the electronic output of the sensors is connected to an input upon a microcontroller. The Sensory inputs are utilized to, read/write data, to control the actuation speed and/or position of a variable speed valve autonomously. The UI inputs range from: voice-command, switches, motion sensors, and/or touchscreen. The UI inputs is a means to send signals to the microcontroller, in-which send a signal to a driver, moreover send a signal to control, one or more motors and/or solenoids. Furthermore, will maneuver a plurality of gears and/or driveshafts, at various speeds, to actuate the valve to an accurate and precise position.

Apparatus is provided to proportionally actuate a valve, furthermore control actuation speed and/or torque. The valve can be actuated manually via an input signal provided by a plurality of controllers. The device has sensory control, wherein sensors is connected in conjunction with the variable speed valve(s) and the electronic output of the sensors is connected to an input upon a microcontroller. The Sensory inputs are utilized to, read/write data, to control the actuation speed and/or position of a variable speed valve autonomously. The UI inputs range from: voice-command, switches, motion sensors, and/or touchscreen. The UI inputs is a means to send signals to the microcontroller, in-which send a signal to a driver, moreover send a signal to control, one or more motors and/or solenoids. Furthermore, will maneuver a plurality of gears and/or driveshafts, at various speeds, to actuate the valve to an accurate and precise position.

A method for automatically opening or closing a gas barrel valve, includes: loading and aligning a gas barrel in a cabinet; separating an end cap from the gas barrel; screw-coupling a connector holder to a gas spray nozzle, from which the ends cap has been removed; winding a spring around a first shaft by enabling forward rotation of the first shaft while suppressing reverse rotation of the first shaft, which is installed in a valve handle holder so as to idle; opening a valve by enabling reverse rotation of a valve handle of the gas barrel while preventing forward rotation of the valve handle holder; and automatically closing the valve at the time of replacement of the gas barrel or when a gas leak is detected.

A method for automatically opening or closing a gas barrel valve, includes: loading and aligning a gas barrel in a cabinet; separating an end cap from the gas barrel; screw-coupling a connector holder to a gas spray nozzle, from which the ends cap has been removed; winding a spring around a first shaft by enabling forward rotation of the first shaft while suppressing reverse rotation of the first shaft, which is installed in a valve handle holder so as to idle; opening a valve by enabling reverse rotation of a valve handle of the gas barrel while preventing forward rotation of the valve handle holder; and automatically closing the valve at the time of replacement of the gas barrel or when a gas leak is detected.

A pressure-based latching switch includes a shuttle valve, a first valve and a second valve. The shuttle valve may switch a fuel through one of a first port and a second port in response to a greater pressure of the fuel at the ports. The first valve may switch a fuel to the first port while a second pressure of the fuel at the second port is less than a second threshold pressure. The second valve may switch the fuel to the second port while a first pressure of the fuel at the first port is less than a first threshold pressure. The pressure-based latching switch may change the fuel supplied to the fuel cell system automatically from a first fuel tank to a second fuel tank in response to the first pressure of the fuel falling below the first threshold pressure.

A pressure-based latching switch includes a shuttle valve, a first valve and a second valve. The shuttle valve may switch a fuel through one of a first port and a second port in response to a greater pressure of the fuel at the ports. The first valve may switch a fuel to the first port while a second pressure of the fuel at the second port is less than a second threshold pressure. The second valve may switch the fuel to the second port while a first pressure of the fuel at the first port is less than a first threshold pressure. The pressure-based latching switch may change the fuel supplied to the fuel cell system automatically from a first fuel tank to a second fuel tank in response to the first pressure of the fuel falling below the first threshold pressure.