Abstract: In a dual hydrant, the combination comprising two spaced apart tubular bodies to receive in-flow of fluids A and B, a fluid mixing zone to receive fluids A and B from said bodies, manually operable flow control valves in the two tubular bodies, a primary check valve in one of the bodies to pass forward fluid flow toward said mixing zone, and to block reverse flow in the one body, an outlet from the mixing zone, and a secondary check valve in series with the outlet to pass forward flow from either or both of the two bodies through the outlet, and to block reverse flow from the outlet to the mixing zone.

Abstract: In a valving assembly, the combination comprising an elongated hollow valve body having an inlet and an outlet for fluid flow, a valve in the body to control the flow, an elongated hollow stem movable in the body to open and close the valve, packing extending between portions of the stem and body, in spaced relation to the valve, a side drain port in and movable by the stem between a first position in which the port is blanked by the packing, and a second position in which the port is exposed to fluid in the body outside the stem, to pass such fluid into the stem for drainage.

Abstract: An automatic system and method for the separation of blood into component parts includes a conically shaped collection and separation bag, component bags connected to the collection and separation bag, a sensor, valves to seal the connections between the component bags and the collection and separation bag, a centrifuge and a controller for controlling the process. Blood is placed in the collection and separation bag and is separated by centrifuging. The components are removed from the collection and separation bag either directly or indirectly by the centrifugal force into the component bags. Flow of the components is directed by automatic opening and closing of the valves in response to the position of the interface between the separated components determined by the sensor or elapsed time.

Abstract: In a system for handling closely proximate flows of relatively clean and unclean water, the combination comprising a first conduit for passing relatively clean water to a first discharge, a second conduit extending protectively about the first conduit, a third conduit extending proximate and lengthwise of the second conduit for passing said relatively unclean water, outside the second conduit, and an outer housing extending about said first, second and third conduits.

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 safety valve apparatus body defining a flow chamber having a side outlet, a control adjustable to move lengthwise in the chamber, a first valving part carried by the control and movable to advance and retract relative to a second valve part on the body, thereby to provide a first check valve to block reverse flow of fluid through the chamber, and a second check valve proximate the outlet to pass forward fluid flow from the chamber and to block reverse flow of fluid to the chamber, via the side outlet.

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: For use in a longitudinally elongated pipe having a pipe wall, the combination comprises first and second relatively slidably interconnectible structures, the first structure to be carried by the pipe wall, and the second structure adapted for lengthwise movement in the pipe; the structures having slidably interconnectible tongue and groove elements; a cam on one of the structures, and a guide on the other of the structures, are interengageable in response to lengthwise movement of the second structure, for relatively aligning the structures to enable slidable interconnection thereof. The guide may take the form of guiding and stabilizing legs.

Abstract: A fluid flow diverting unit, the combination comprising a body having a hollow interior, and three generally tubular legs defining bores communicating with the interior; a first leg having a fluid inlet port and is attachable to a fluid supply duct; a leg having a pressure fluid flow outlet port and carrying a back flow preventing check valve unit that opens to discharge fluid when pressure in interior exceeds P.sub.1 ; a third leg having a secondary fluid flow outlet port and carrying a valve to control fluid discharge through the secondary outlet port, the valve having a manually operable control characterized in that in a first position of the control the valve is held closed by water pressure to block discharge through a secondary port, and in a second position of the control, the valve is biased open to allow flow through the secondary port.

Abstract: For combination with a tubular casing, the casing having a bore and a side wall through port, the improvement comprises, in combination, an assembly to be lowered in the casing to establish water flow upwardly in the casing, and then out the side port, the assembly comprises a hollow body sized to travel in the casing, the body having a side nipple, to be received in the port, the body having a lower connection to which a well pipe is connectible to deliver water upwardly to the nipple; a dog pivotally connected to the body and having first and second legs alternately engageable with the casing bore; and elongated support structure extending within and upwardly from the body and movable longitudinally in the casing and rotatable relative to the body, the structure having operative connection to the dog to pivot the dog between a first position, in which the dog first leg engages the casing bore to thereby retain the nipple within the casing bore spaced from the side port, and a second position in which the do

Abstract: In a valving assembly, the combination comprising an outer tubular member having a first flow port; an inner member having closure means thereon to close the port in relatively axially advanced position of the inner member, and to open the port in relatively axially retracted position of the inner member; control means to control relative movement of the inner member between the positions; an axially movable check valve positioned about the axis of the inner member to pass fluid flow from the port and to space defined between the members, and to block reverse fluid flow from the space and through the first port in the inner member relatively retracted position; and a second port to pass fluid from the space in relatively retracted position of the inner member, thereby to relieve pressure of the fluid in the space.

Abstract: For use with a watering trough fill control valve having float structure located to rise as water is filled into the trough via the valve, and to effect closing of the valve when the trough is filled to predetermined extent, the float structure located to fall as water level lowers in the trough, the float structure controlling a water inlet subject to freezing in closed position in winter, comprising an apparatus operatively connectible with the float structure for biasing the structure, so that it cannot completely close off ingress of water at the inlet as ambient temperature drops below water freezing level; the apparatus including a bimetallic control element.

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: An automatic draining back flow prevention apparatus, for use with hydrant structure, comprising tubular body structure having main passage structure between flow entrance and exit ports; the body structure having a first side port communicating with the passage structure; diaphragm structure carried by the body structure to be exposed to flow in the passage structure; a stopper in the passage structure cooperating with the diaphragm structure to pass forward fluid flow from the hydrant structure, while the diaphragm structure is positioned to block exit flow of fluid through the first side port, and to block back flow of fluid through the main passage structure when the diaphragm structure moves to unblock flow of fluid through the first side port; a first seat in the body structure exposed to the passage structure, and seating the first diaphragm as it moves to block flow of fluid through the first side port; and spring structure carried by the body structure to urge the stopper toward the first diaphragm,

Abstract: An automatic draining back flow prevention apparatus comprises tubular body structure having main passage structure between flow entrance and exit ports; the body structure having first and second side ports communicating with the passage structure; first and second diaphragms carried by the body structure to be exposed to flow in the passage structure; a stopper in the passage structure cooperating with the first diaphragm to pass forward fluid flow while a first diaphragm flexes to block exit flow of fluid through the first side ports, and to block back flow of fluid through the main passage structure when the first diaphragm moves to unblock exit flow of fluid through the first side port; the second diaphragm moving to block exit flow through the second side port in response to the forward flow of fluid through the main passage structure, and being movable to allow drainage flow of fluid through the second side port during at least one of the following conditions: when the stopper and first diaphragm block

Abstract: An automatic draining back flow prevention apparatus comprises tubular body structure having main passage structure between flow entrance and exit ports; the body structure having first and second side ports communicating with the passage structure; first and second diaphragms carried by the body structure to be exposed to flow in the passage structure; a stopper in the passage structure cooperating with the first diaphragm to pass forward fluid flow while a first diaphragm flexes to block exit flow of fluid through the first side ports, and to block back flow of fluid through the main passage structure when the first diaphragm moves to unblock exit flow of fluid through the first side port; the second diaphragm movable to allow in-flow of air through the second side port when the stopper and first diaphragm block back flow of fluid through the main passage structure.

Abstract: A freeze resisting valve apparatus, for controlling water flow, the combination comprising: a vertically elongated, hollow valve body having a lower portion adapted for installation underground, the body having a lower water inlet associated with the lower portion, and an upper water outlet, for passing a stream of pressurized water through the body; a water reservoir adapted for installation underground and having communication with the body lower portion via an ejector port; a valve seat projecting in the lower portion of the body and having a narrowed passage extending upwardly and positioned to increase pressurized water flow velocity in proximity to the port, the ejector port being proximate the level of the seat; a valve member tapering downwardly toward an apex always remaining in alignment with the narrowed passage as the stopper member moves toward and away from the seat to effect drainage of water in the valve body downwardly, in the body past the stopper to the reservoir when the stopper is closed

Abstract: An ignition system for a motorcycle two cylinder internal combustion engine includes magnetically coupled primary and secondary coils, two spark plugs at each of the cylinders, a source of electrical current, contacts controlling electrical current flow to the primary coil for producing high voltage output from the secondary coils to be delivered to the spark plugs.