Abstract: A fire hydrant drain includes an elongated, hollow body having a first portion, a second portion, and a third portion. The first portion is configured to protrude a first length radially through an outer wall of a fire hydrant. The second portion is continuous with and between the first portion and the third portion. The second portion includes a first bend having a first curvature degree and a first curvature direction, and a second bend having a second curvature degree and a second curvature direction. The first curvature degree is larger than the second curvature degree, and a direction of the first curvature is opposite a direction of the second curvature. The first bend is between the first portion and the second bend. The third portion extends a second length, and an angle between the first length and the third length is less than 90 degrees.

Abstract: An improved hydrant structure with an integral piston set is provided with the hydrant main body having a valve chamber for receiving a water control valve. The water control valve is composed of a valve member, rubber pads, a piston cylinder with an integrally enclosed structure and a piston rod disposed inside the valve member, a valve rod, a cover, a valve cap, and a rotary button; the outer side of the piston cylinder is formed with different outer diameters, and the preset portions thereof are formed with a water inlet and a water outlet holes, such that the piston rod can be adjusted to alter the relative relation, thereby achieving functions of starting/terminating water supply and adjusting water mixing ratio. The piston cylinder with an integrally enclosed structure is formed through a stainless steel base pipe and a plastic sleeve member enclosing the exterior thereof.

Abstract: A yard hydrant, including a discharge nozzle above ground level, connects to other vertically reciprocal working parts in the ground below the frost line. A water storage chamber, disposed below the frost line, is formed in part by a deformable diaphragm. Residual water in the hydrant, when the hydrant is turned off, is collected in the water storage chamber and returned to the hydrant for discharge through the nozzle when the hydrant is turned on. A venturi disposed in the water supply line creates turbulence and thereby creates a lower pressure adjacent the exit of the venturi when the hydrant is turned on. This lowered pressure at the venturi exit speeds up the evacuation of water from the water storage chamber when the hydrant is on so the storage chamber can accept and store water that would otherwise be above the frost line when the hydrant is turned off.

Abstract: Integrated flow control backflow preventer valve (“IFCBPV”) for new and existing wet- and dry-barrel fire hydrants, with barrel drain assemblies for dry-barrel hydrants, and hydrants equipped with such IFCBPVs, are presented. An exemplary IFCBPV can have a retaining screen comprising equidistant concave radial spokes intersecting at a central ring structure, a freely suspended check ball, and a lower ball seat with a seal. The upper surface of the retaining screen can be affixed to the hydrant's axial shaft, and can thus be used to open and close the hydrant via the ball. Alternatively, the retaining screen can be fixed and the axial shaft provided with a cup on its bottom that mates with the freely suspended ball that is caged between the retaining screen and the ball seat. An exemplary barrel drain assembly can comprise a spring-loaded piston, or alternatively, a check ball design as in the main barrel.

Abstract: A Yard Hydrant Made Easy has a riser with a slip connection, called a pitless adapter, attached directly to the side of the riser, below freeze level. The water supply is connected to the outside section of the pitless adapter and a yard hydrant is attached to the inside removable section of the pitless adapter. This hollow riser and slip connection allows for easy removal and replacement of a yard hydrant, without the need of any future excavation, busting of concrete, or tearing up of landscaped areas. A seepage section may be incorporated at the base of the riser to allow a yard hydrant to drain out without ever coming in contact with soil. This prevents any chance of the drain hole, at the base of the yard hydrant, becoming stopped up and causing the hydrant to freeze. A dual check valve backflow preventer may be installed at the base of the hydrant.

Abstract: A Yard Hydrant Made Easy has a riser with a slip connection, called a pitless adapter, attached directly to the side of the riser, below freeze level. The water supply is connected to the outside section of the pitless adapter and a yard hydrant is attached to the inside removable section of the pitless adapter. This hollow riser and slip connection allows for easy removal and replacement of a yard hydrant, without the need of any future excavation, busting of concrete, or tearing up of landscaped areas. A seepage section may be incorporated at the base of the riser to allow a yard hydrant to drain out without ever coming in contact with soil. This prevents any chance of the drain hole, at the base of the yard hydrant, becoming stopped up and causing the hydrant to freeze. A dual check valve backflow preventer may be installed at the base of the hydrant.

Abstract: The disclosure relates to a method for commissioning pneumatically operated actuators that are controlled by a positioner. To determine the drive type, a constant flow of pneumatic fluid is applied to the actuator during commissioning while a drive-specific characteristic curve of the fed back position is recorded over time. Then the measured characteristic curve is compared with a given specimen characteristic curve. The drive type is inferred from the level of difference or agreement between the drive-specific characteristic curve and the specimen characteristic curve.

Abstract: A water hydrant for suppling potable water from a water source has an internal movable riser contained within a housing that extends beneath the ground to a depth below which freezing temperatures cannot reach. A chamber housing located at a distal end of the hydrant, beneath the frost line, contains a valve which may be actuated by the moving riser to provide a flow of water from the water source and through the riser. The chamber housing is configured to receive residual water from the riser when the flow of water has been shut off by the valve and to store the water beneath the frost line under sanitary conditions. A piston is disposed on a distal end of the riser, is slidably disposed within the chamber housing, and moves with the riser to expel water from the chamber housing when a handle of the hydrant is subsequently moved to reopen the valve.

Abstract: A hydrant comprising a housing forming a reservoir; and a piston configured to force residual fluid out of the reservoir to an outlet and to allow supply fluid to flow from an inlet through the piston to the outlet when the piston is actuated in the housing to a first position, and when the piston is actuated in the housing to a second position, to restrict flow of the supply fluid to the outlet and to allow at least a portion of the supply fluid that has flowed from the inlet to flow into the reservoir thereby becoming new residual fluid.

Abstract: A yard hydrant has an elongated wet pipe with a plunger that seals against the inside of a well casing. Lifting a pivoting handle at the top of the wet pipe lowers the wet pipe which opens a normally closed supply valve. Pressurized water can then flow up the wet pipe and out of a nozzle head mounted to the upper end of the wet pipe. Lowering the handle pulls the wet pipe upward, thereby clearing it from the supply valve which is spring biased to shut off the water supply. The handle has a cam that positively actuates a normally closed anti-siphon valve so that water left in the wet pipe can fall under gravity to a collection chamber within the well casing beneath the piston. Lifting the handle again lowers the wet pipe and forces the water in the collection chamber back up the wet pipe. At the same time, the anti-siphon valve will close and the wet pipe re-opens the supply valve.

Abstract: A hydrant, comprising in combination an upper portion including a handle, a lower portion to be installed at least in part underground, the lower portion including a reservoir and a piston adapted to be displaced in the reservoir in response to handle manipulation, to displace water from a portion of the reservoir, a first conduit communicating with the interior of the reservoir to receive displaced water, the first conduit having an outlet located above ground to freely discharge water received in the conduit from said chamber, when water is displaced from the reservoir.

Abstract: A freeze-resistant water supply system comprising a water outlet or outlets having ON-OFF controls; a water supply line or lines to the outlet or outlets and having a section subjected to cold temperature, and a drain line or lines associated with the outlet or outlets to receive discharge water, and apparatus operatively coupled with the water supply line or lines and drain line for periodically effecting evacuation of water from the supply line section for ultimate flow to the drain line, as a function of the operation of the ON-OFF controls.

Abstract: A yard hydrant comprising a cylinder, and a piston movable up and down in the cylinder in association with water flow into and out of a reservoir in the cylinder; tubular structure associated with the piston and extending upwardly from the piston and downwardly from the piston, and movable therewith; supply structure to deliver water from a source into the tubular structure for flow upwardly therein and delivery above the piston and cylinder when the piston is in a first position relative to the cylinder; there being porting carried by the tubular structure to drain water into the reservoir within the cylinder below the piston, when the piston is moved to a second position relative to the cylinder; and an actuator above the piston and cylinder to effect displacement of the piston and between up and down positions.

Abstract: An improved freezeproof or freeze resistant valve assembly is provided for use in an outdoor drinking fountain or the like. The fountain includes a main on-off valve for coupling an underground water supply conduit via a standpipe to a fountain head to dispense water. The freezeproof assembly comprises a sump chamber installed below the frost line and having a piston mounted therein for reciprocal movement between advanced and retracted positions. When the main valve is turned off, the piston retracts by gravity within the sump chamber and residual water remaining within the standpipe drains to the sump chamber at low pressure through a normally open control valve mounted on the piston. When the main valve is turned on, the control valve is closed by water pressure and the piston is advanced within the sump chamber to expel the water previously collected therein through a discharge conduit coupled to a main fountain drain.

Abstract: A freeze-resistant water supply system comprising a drinking water outlet having an ON-OFF control; a water supply line to the outlet and having a section subjected to cold temperature, and a drain line associated with the outlet to receive discharge water supplied via the outlet; and, apparatus operatively coupled with the water supply line and drain line for periodically effecting evacuation of water from the supply line section for ultimate flow to the drain line, as a function of the operation of the ON-OFF control.

Abstract: A yard hydrant includes a discharge nozzle above ground level connected to other vertically reciprocal working parts in the ground below the frost line. A cylindrical water reservoir unit, disposed below the frost line around said working parts, includes a diaphragm assembly removably attached to such working parts for reciprocation therewith, and a deformable diaphragm on said assembly provides a water storage area. Residual water in the hydrant when it is turned off is collected in the storage area and returned to the hydrant for discharge through the nozzle when the hydrant is turned on. The working parts are removable from the diaphragm assembly for servicing and repairs.

Abstract: The present invention is for a freezeless ground hydrant having a nozzle above ground and having a main valve adapted to be connected to an underground source of water pressure at a point located below the frost line in the soil. Also underground is a drain water storage system including a storage cylinder. When the hydrant is turned off, the residual water in the nozzle drains into the cylinder and is retained there until the hydrant is turned on again. When the hydrant is turned on, a mechanical linkage connected to the hydrant handle causes the cylinder to expel the drain water therein through a drain line which extends upwardly above the ground.

Abstract: The ground hydrant of the present invention includes an outlet nozzle above ground and a drain water collection cylinder located below the frost line of the ground. When the hydrant is shut off, the residual water in the nozzle drains into the ground water cylinder and is stored there below the frost line. The next time that the hydrant is turned on, the piston within the cylinder forces the stored water in the cylinder outwardly through a drain line where it is expelled above the ground. The force for moving the piston within the cylinder is provided by water pressure which is diverted from the water source to move the piston and force the stored drain water out of the cylinder and onto the ground. When the hydrant is turned off a second time, the residual water within the hydrant drains again into the cylinder where it is stored until the next time the hydrant is turned on.

Abstract: A valve is located below the frost line in the water supply line for a drinking fountain or the like. When the valve is opened, a piston is raised by the water pressure, compressing a spring. When the valve is closed, the spring retracts the piston, sucking the water in the line down below the frost line. Water is retained within the valve and not drained into the surrounding earth. Hence, danger of pollution is reduced.

Abstract: A water supply control appliance adapted to be buried in soil beneath local frost level contains a chamber fitted with a piston which is spring-biased in opposition to inlet water pressure. Such pressure forces the piston to fully charged position at one end of the chamber whereupon a piston valve is opened to pass the water to outlet. Closing the supply valve releases pressure on the piston, permitting the piston to move in response to the spring bias. The piston movement pumps water below the piston out to drain and drains water from the outlet lines into the expanded chamber above the piston, safe from frost. Water in the drain line will, at the end of the piston travel, fall back into the chamber above the piston after piston travel is completed, when a piston ring seal spans a port to the drain line.