Abstract: An automatic valve for a sewer or the like includes a body having an upstream inlet and a downstream exit for liquid. A path joins the inlet and exit, and a closure gate is hingedly mounted to the body at a substantially horizontal axis located above the path, so that the gate can swing between a first position in which it blocks the path and a second position in which it unblocks the path. An arm is fixed with respect to the closure gate to swing with it in such a way that the arm is higher when the gate blocks the path than it is when the gate unblocks the path, the arm counterbalancing the closure gate so that the latter normally seeks the second position. A cage surrounds the arm and communicates with the path, and a float member in the cage under the arm means is free of connection to the arm means or any other part of the apparatus, whereby a rise in liquid level causes the float member to urge upwardly against the arm and close the closure gate.

Abstract: An improved sewer relief valve which is vandal-proof and automatically opens responsive to a back flow of sewage and drain water within a plumbing system.

Abstract: A float valve in this invention has a hollow body having a spigot adjacent an orifice, a valve seat surrounding the orifice, a float arm pivoted to the hollow body, and an abutment surface on the float arm engageable against an elastomeric valve member when carried by the spigot.

Abstract: A liquid level control utilizing magnetic repulsion for raising and lowering a lever for venting or closing a gas pressure supply path to move a valve assembly, in the gas pressure supply path, in a relay-type snap action for opening or closing a valve controlling the liquid input and output of a vessel in response to the rise and fall of a float assembly with the liquid level.

Abstract: A steam trap of the type having a dual fulcrum lever. A planar surface on which the fulcrums pivot is integral with the valve orifice, and as a result the spacing between the valve orifice and the pivot plane can be easily controlled.

Abstract: A valve, of compact design, permits the opening and blocking of a liquid flow whose level is directly proportional to the operation of the valve, with the use of conventional floats being completely abandoned, and with the hydraulic mechanism of said valve being activated in different manners, according to the origin of the source of flow, which can be produced either through the upper part of the tank or from the bottom. There are three embodiments of the valve.

Abstract: A flood control arrangement for dishwashers in which the in-flow to the dishwasher tub from the water supply line is automatically terminated in the event the tub water rises to a flood level. The arrangement includes a sealing plunger disposed in a plunger body member housing installed downstream of the water fill valve. The sealing plunger tends to be moved to the sealing position by the line water pressure to shut off in-flow to the dishwasher but is blocked from movement to this position whenever the water level is below the flood level by the stem of a float positioned in the dishwasher tub. When the water level in the tub approaches the flood level, the float rises in the tub to a position whereat the float stem releases the sealing plunger to allow it to move to the sealing position and shut off further flow to the dishwasher.

Abstract: A level control arrangement for dishwashers in which the inflow to the dishwasher tub from the water supply line is automatically terminated when the water level in the tub reaches a predetermined level. The arrangement includes a two-stage level control valve disposed in a valve housing installed downstream of the water fill valve. The valve is moved into and out of engagement with the valve housing in response to a connector which in turn is in operative engagement with a stem of a float positioned in the dishwasher tub. When the water level in the tub approaches a predetermined washing level, the float rises in the tub to a position where the connector permits the valve to move to a sealing position, thereby terminating further flow to the dishwasher tub. When the water is drained from the tub, the float stem moves the connector thereby releasing the pressure exerted against the sealed valve through a port located within the valve.

Abstract: In a poultry watering system having a float-controlled valve for maintaining a desired water level in a trough, leakage through the valve from an overhead supply line, which may occur when the water supply is cut off is effectively prevented without reducing sensitivity of the float by the provision of spring means located within the interior of a valve housing and acting on the end of the float stem.

Abstract: A sewage relief valve includes a cylindrical housing mounted on the upper end of an upper end of a riser connected to a sewer line, the housing includes a cylindrical through-bore with the upper end of the bore sealed by means of a dome cover held in place by a resilient O-ring, and a float supported beneath the housing on a lift linkage is responsive to rise with the level of liquid in the riser for forcing the cover from the end of the housing thereby relieving the sewage line. The lift linkage means is supported within the housing by support means which permits the linkage to be lifted and carried upward out of the housing by the float means when liquid flows therethrough.

Abstract: A non-siphoning float controlled valve assembly for supplying water from a source to a livestock watering tank comprises a one-piece cast aluminum hollow housing open at the bottom and having an integrally formed upwardly projecting hollow neck near one end. Means are provided for detachably connecting the housing to the side of the watering tank. The neck serves as a water-fill passage and the main portion of the housing defines a float chamber. The upper end of the neck is adapted for connection to a water supply hose or pipe, and a water-fill inlet opening having a valve seat therearound is provided in a constricted portion of the neck. A pair of anti-siphon holes extend through the neck wall.

Abstract: A combination monitoring and regulating instrument for oil field stationary engines or compressors receives oil by gravity in a float chamber having a float operated oil admission and shut-off valve and particle filtering means. Oil from the float chamber is delivered by gravity feed to the crankcase of the associated stationary machine. When the external oil supply is depleted, the resulting movement of the float in the float chamber will produce rotation of a sealed shaft which extends into an explosion-proof chamber of the instrument to move a float position pointer therein, and to simultaneously activate an ignition cut-off switch, or equivalent pneumatic valve means in the explosion-proof chamber to shut down the stationary machine. A convenient oil level sight gage is provided on the instrument.

Abstract: Method and apparatus for metering fuel flow to a gas turbine engine includes a first bifurcated movable metering element straddling a pair of opposed metering openings and shiftable to adjust the area of the openings to vary fuel flow from a pump to the combustion chamber of the engine. A second bifurcated movable metering element straddles a second pair of opposed metering openings to adjust fuel flow back to the inlet of the pump in bypassing relationship to the combustor. The movement of the second metering element is responsive to the pressure differential across the first metering openings to maintain this pressure differential substantially constant to allow precise fuel metering by movement of the first metering element.

Abstract: A fluid flow control valve for automatic fluid level control in a reservoir is provided having a valve chamber with axially aligned inlet and outlet orifices, a valve closure element disposed in the chamber and having an actuating stem projecting outwardly through the outlet orifice, and a float-type lever arm engageable with the actuating stem. The valve closure element is normally maintained in closing relationship to the outlet orifice by the pressurized fluid at the inlet side with the valve designed for operation over a wide range of fluid pressures. Movement of the lever arm in response to the fluid level is effective in rocking the valve closure element through its actuating stem to a position where fluid may flow through the outlet orifice. The lever arm is provided with a weighted float to assure positive operation of the valve in high pressure fluid systems and the lever arm is formed with means readily permitting adjustment thereof to precisely determine the fluid level in the reservoir.

Abstract: A self-regulating device for controlling the flow of water from a conduit open end into a reservoir or wet marshland and to an outside body of water, such as tidal water, which includes a gate pivotally mounted at its bottom edge so as to be pivotable upwardly to close the conduit end. A rod is pivotally connected to the upper edge of the gate and extends upwardly through a slotted bracket, and a float is mounted on the upper portion of the rod above the bracket. As the level of the tidal water rises, the float will rise and move the gate into the closed position.