Abstract: A backflow prevention device including a tank inside of and moveable relative to a housing. A cap coupled to the housing and including inlet and outlet chambers fluidly connected through an inlet, the outlet chamber communicating with the tank. A shell is connected to the cap and includes a shell inlet chamber, which communicates with a first outlet hole of the inlet chamber, and a second outlet hole, which communicates with the tank. An inlet sealing member opens/closes the inlet to fluidly connect/disconnect the inlet chamber and the outlet chamber; and an outlet hole sealing member is moveable with the tank to open/close the second outlet hole. Closing the second outlet hole prevents water from flowing through the second outlet hole and switches the inlet from open to closed. Opening the second outlet hole allows water to flow through the second outlet hole and switches the inlet to open.

Abstract: Described is a method and system for a level measurement. An echo curve is analyzed, and both the level and the moisture content of the stored material is determined therefrom. The level measuring instrument works in such an energy-saving manner that it is sufficient to supply the instrument with power using a 4 . . . 20 mA two-wire conductor loop that is also used to transmit at least some of the measured values.

Abstract: A salt water supply unit includes a salt water plate that divides the interior of a salt water tank into a salt container and a salt water reservoir, and a salt water well that stands and penetrates the salt water plate. The salt water well accommodates a salt water valve device and a concentration detector. The salt water valve device includes a valve box having a valve hole that allows makeup water or salt water to flow therethrough, a float rod penetrating the valve hole, a valve element coupled to a first end of the float rod, and a water level detecting float coupled to a second end of the float rod. The concentration detector includes a switch that is incorporated in a stem holding a concentration detecting float. The switch outputs different detection signals in accordance with the position of the concentration detecting float.

Abstract: A bubbler container assembly particularly adapted for use in vapor generating systems comprising a main outer vessel, an inner bubbler vessel, a carrier gas inlet and a vapor outlet such that the inner bubbler vessel is contained within the main outer vessel and the bubbler container assembly is constructed so as to self-meter an incoming supply of vaporizable liquid during the introduction of a carrier gas and extraction of resulting vapor. Preferably, the system further provides for magnetic induced centering and positioning of the inner buoyant bubbler vessel, fluid temperature sensing and control, connection of a fluid makeup supply, carrier gas inlet supply, and vapor extraction outlet.

Abstract: A bubbler container assembly particularly adapted for use in vapor generating systems comprising a main outer vessel, an inner bubbler vessel, a carrier gas inlet and a vapor outlet such that the inner bubbler vessel is contained within the main outer vessel and the bubbler container assembly is constructed so as to self-meter an incoming supply of vaporizable liquid during the introduction of a carrier gas and extraction of resulting vapor. Preferably, the system further provides for magnetic induced centering and positioning of the inner buoyant bubbler vessel, fluid temperature sensing and control, connection of a fluid makeup supply, carrier gas inlet supply, and vapor extraction outlet.

Abstract: A flush toilet system includes a bowl that is drained in a flush operation through a flow path including a trap and a siphon. A bypass passage supplies a back jet of water in the reverse flow direction in the flow path. A back jet valve assembly opens to permit back jet flow during only the first part of the interval during which flush water is supplied to the system from a water supply. The kinetic energy of the back jet is converted to static pressure to block or impede flow of flush water through the flow path. Water level increases in the bowl, and when the back jet flow is discontinued a siphon flush operation proceeds. The back flush valve assembly also releases water after the flushing operation in order to reseal the trap.

Abstract: The floating skimmer has a body fitted with a floating weir and with a suction outlet in its base for connection to a suction hose. A float is provided to keep the body afloat. The float is hinged to a wall of the body. A scuttle valve is provided in a wall of the body and is connected to the float. If the body should rise in the water, the float drops and opens the scuttle valve to admit water to the body and scuttle it so that it sinks to its former level.

Abstract: A device is provided to control the level of water in the gutter of a swimming pool which is responsive to the level of water in the pool. Weirs are provided on the pool side of the gutter to which weir housings are attached to conduct skimming and/or surge water into the gutter. Each weir housing is provided with a hollow floodable trough-like gate which can be adjusted to control the inflow of water past the gate. The gates are individually adjusted about the perimeter of the pool to control the inflow of water as a function of distance from the water outflow end of the gutter.

Abstract: A float valve mechanism comprising a housing 13 defining a closed chamber 14 having an inlet 12 and an outlet 22. The chamber 14 is closed by a cap 17 threaded on to it. The valve head 32 has a conical surface 34 engaging a conical valve seat 33 and a skirt portion 30 a slightly smaller diameter than the outlet port 22 so that water flowing through the outlet is throttled as the valve nears its closed position. The valve head 32 can be formed separately, of rubber like material, and snap fitted on the valve stem 29.

Abstract: Open vessel separator valve has ballasted, hollow-cavitied float disposed above oil/water inlet orifice. Float having large net mass floats in water and sinks in oil. Liquid passes through spillways of sinking float into said float cavity and fills same. Sunken float applies downward force upon sealing means located thereunder, thereby closing oil/water inlet orifice. Device can be reset by draining liquid from sunken float.

Abstract: Shown is a portable dispensing system schematically, with a motorless carbonator of the continuous flow type shown in detail employing a needle type valve that is removable as a unit for replacement or repair and which operates in combination with a float element in the carbonator to regulate flow of gas into the carbonator in a smooth manner that also induces a smooth and efficient flow of inlet water from a pressurized supply tank of water to equal the flow rate of carbonated water being drawn from the carbonator to serve one dispensing valve alone or two at a time.

Abstract: For ensuring a quick cut-off of a float controlled valve, there is provided a float having a buoyant body and a receptacle for liquid on the body, a single first tube providing an inlet to and an outlet from the receptacle, and a second tube connected to the first tube at an angle directed towards the interior of the receptacle to permit a portion of the liquid from the valve to flow through the second tube into the receptacle to bias the float downwardly and therefore the valve to its maximum open position, the direction of flow of liquid from the second into the first tube acting to dam any liquid in the receptacle. When the valve approaches its closed position, the flow through the second tube decreases and liquid flows out of the receptacle so removing the bias on the float and allowing the float rapidly to rise and close the valve.

Abstract: A safety shutoff valve for fuel storage tanks and the like includes a housing with a float controlled valve member which closes in response to the rising liquid level in the tank to which the valve is attached. An elongated tubular member is attached to the valve outlet and projects an appreciable distance below the valve member that when the liquid level is high enough to close off the opening in the elongated member, a back pressure is developed within the elongated member and valve housing which causes the valve member to close and seat relatively gently under high pressure fill conditions. Special openings are provided in a baffle over the valve member to allow a portion of the incoming liquid to impinge upon the valve member to help urge it beyond the baffle whereupon it is driven to its closed position by the incoming liquid stream.