Abstract: Disclosed is a sequential operating mechanism for valves for applications requiring actuation of one valve, or set of valves, prior to actuation of another valve, or set of valves. The equipment preferably includes an actuator driver mounted for powered selective reciprocation through a stroke of selected length. The actuator carries cam pins which engage cams (preferably cam slots) on cam plates attached to the stems of the respective valves during the course of an actuator half stroke. The cams are configured with respect to the paths of movement of the cam pins and with respect to the valve stems so that one valve is fully actuated to its extreme position before actuation of the other valve begins. If additional valves, in the same or different piping networks, require actuation at the same time as one or both of the cam actuated valves, such additional valves are ganged for simultaneous operation with the appropriate one of the cam actuated valves.

Abstract: A change-over device comprising several connecting tubes is arranged before the coating station in order that during the coating of photographic silver halide emulsions the coating operation need not be interrupted when changing from one emulsion type to the other thus allowing direct coating of one of the emulsions which are fed from the supply containers while the remaining emulsions are recycled into the emulsion line by means of a pressure regulating valve. The outlet of an emulsion is effected by a rotational and lifting movement of the changeover piston.

Abstract: This apparatus disclosed in its preferred form is a choke for controlling the flow of drilling mud which is highly abrasive. The abrasive drilling mud is introduced through a lateral port and an elongate tubular body. In the tubular body, a fluid actuated, double acting piston is forced to a choke control position. The piston has appended to it a centralized tubular extension which receives a sleeve of wear resistant material. The sleeve is positioned in a circular chamber communicated to the lateral port where the drilling mud is introduced. It travels toward a seat downstream of the body. The seat is formed of hardened material. The downstream outlet of the body is additionally lined with a wear resistent sleeve.

Abstract: A system for purging the aperture and surrounding portions of a blood cell counter of dirt, debris, and previous sample liquid. A sample tube extends from a source of either sample liquid or cleansing solution to a small gap between the aperture and housing assembly. A purge line is connected between an annular portion surrounding the gap and a pump which supplies negative pressure. Due to the geometry of the sample tube, gap, annulus, and purge line, a high pressure drop occurs across the gap and the liquid flows at relatively high velocity past the aperture to facilitate cleaning.

Abstract: A closed system is provided for simultaneously mixing pesticide with water and transferring the same to a storage or spray tank for subsequent use. The system includes a pipe casing having a water inlet section for connection to a pump and a water discharge section for connection to the spray tank with a venturi chamber defined therebetween. A sealed hose connects the venturi chamber to a pesticide shipping container so that when water is pumped into the spray tank, pesticide is drawn into the venturi chamber in a proper proportion for mixing with the water.

Abstract: A feeder for apparatus for ejecting a mixture of liquids, e.g. urethane foam, comprises a pair of swash plate proportioning pumps one individual to each of the liquids, e.g. resin and isocyanate, each proportioning pump being fed by a gear pump from a supply of the respective liquid. Seepage along the drive shafts of the isocyanate pumps is continuously removed by bathing them in a recirculating stream of flushing agent. The swash plate and gear pumps and flushing agent pump are all driven by a single motor from a common chain drive. The liquids are heated during passage through separate hoses to a common dispensing head or gun, by immersed coil electric resistance heaters extending lengthwise freely within the hoses. A novel control system is provided for the hose heater circuit, the adequacy of the liquid supply and other operating conditions.

Abstract: An improved valve arrangement for distributing liquid and/or gaseous subsces from a plurality of substance storing vessels to a processing vessel utilizing fluidic pressure control valves. A common conduit line runs through a block and has an output end connectable to a receiving vessel, the line has a series of openings along one surface of the block. Flexible membranes disposed above the openings of the common conduit line and similar openings in the block surface connected to the supply conduit lines control the fluid communication between the supply conduits and the common conduit.

Abstract: This invention relates to structure for preventing icing in fluid valves such as gate valves, the gate of which is movable inside a chamber. Obstacles formed with orifices therein communicate with the chamber, intercept the flow of fluid through the valve and create a continuous circulation of fluid in the chamber thereby preventing any accumulation of water therein which is liable to freeze and cause the valve mechanism to seize up.

Abstract: A temperature insensitive, low cost, pressure regulating and remotely flushable emitter for drip irrigation systems comprises a nodal body insertable into the wall of a pipe and having an end face aperture in which a deflectable resilient element responds to interior water pressure changes. The resilient element is deflectable normally to the plane of the end face, and provides at least one edge surface in facing, shearing relation to the end face aperture wall. In a first mode, one or more slit apertures decrease in area in response to increases in interior water pressure within a nominal operating range. When the pressure is raised further, however, the resilient element is deflected across the end face aperture wall, to define at least one slit aperture providing a low volume but high velocity flow which creates a flushing or cleaning action.

Abstract: A method and system for carrying out the method, relating to mixing of solutions, wherein the base liquid in a tank is circulated through an endless circuit while the chemical is gradually introduced into the circulating flow base liquid to achieve through mixing. A chemical is withdrawn under valve control into a measuring receptacle prior to mixing same with the base liquid. Provision is included for rinsing the chemical source container, the resulting rinse solution being automatically introduced into the tank, leaving the source container in condition to meet legal requirements for disposal. To simplify disposal of rinsed containers and discourage re-use thereof, a feature of the method and system involves means for collapsing the containers. A novel multiple valve assembly enables all features to be embodied in a simplified and condensed system.

Abstract: A plug valve is disclosed having a valve chamber with inlet and outlet flow passages in fluid communication therewith, at least one of the flow passages having a generally cylindrical seat recess formed therein about the flow passage and an axially movable seat assembly disposed therein. The valve includes improved means for biasing the sealing assembly against the plug member and cleaning the space between the sealing assembly and the valve body, namely a plurality of conduits extending from the interior surface of a flow passage to a shoulder surface of its associated seat recess and providing for fluid communication between those surfaces.In the preferred embodiment of this invention, wherein the plug is spherical and rotatably mounted on upper and lower trunnions, the lower end of the lower trunnion is mounted in a trunnion cap, and a limit stop is incorporated therein comprising trunnion.

Abstract: Portable apparatus is used for dispensing of urea formaldehyde foam for use as a sound and heat insulator. The apparatus includes a framework having mounted therein three valves which are simultaneously actuated by a single handle lever. One valve dispenses air to a connection downstream of another of the valves which dispenses a mixture of water, detergent, and resin hardener while the third valve controls the flow of urea formaldehyde resin. The air and water-detergent mixture are combined in a frothing chamber and together they are conveyed in foamed condition to a mixing chamber. The resin is sprayed into the mixing chamber to combine with the froth and the resulting mixture is propelled into a cavity which will house the insulation.

Abstract: A valve for injecting or ejecting fluid to or from a fluid stream flowing in a pipe includes a valve body connected between abutting flanges in the pipe. The body has a through passage intersecting the pipe with seating assemblies located in each end of the through passage which cooperate with a stem assembly to provide communication between a port, the valve body and the pipe.

Abstract: A 4-way valve for selectively connecting two liquid supply lines separately to a container. The valve comprises a housing forming four chambers each provided with an inlet/outlet connection and each connected by means of connecting channels with two adjacent chambers. Each chamber is provided with a rotary slide displaceable between a first operating position in which the slide closes one of said connecting channels of the chamber and a second operating position in which the slide closes the other of said connecting channels of said chamber. The slides are operationally coupled to each other in such a way that in each operating position two connecting channels are closed at two ends and the other two connecting channels are open in order to obtain a double sealing of said closed connecting channels.

Abstract: Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas is released, forming small bubbles on filterable particles to float these particles to the surface for removal. The system further includes a back pressure valve at the sewage inlet port which, if obstructed, is automatically flushed. During the backwash cycle, the water level above the filter bed may be lowered to the level of a wash-through zone, and filtered water then pumped upward through the filter media, thereby carrying particles from the filter media out through the wash-through zone.

Abstract: In a rising-plug plug valve wherein the plug and valve body at the narrow end of the plug define a cavity, a passage is provided between the cavity and the outlet opening of the plug valve. On opening, the valve plug and seat portion adjacent the narrowest portion of the plug is flushed by liquid passing therebetween and the outlet opening of the passageway.

Abstract: A tank is provided which may be filled with water and pressurized from a CO.sub.2 bottle or the like and it may be connected to the system to be cleansed by means of conventional quick connector hoses. An inner container is provided which holds a cleansing solution and a valve system is located within the inner container connecting and disconnecting same to the outlet of the main tank. When pressure is applied to the main tank, a one-way valve in the container permits this pressure to act upon the liquid within the container which is then forced into the valve system and thence to the outlet of the main tank mixing with water from the main tank as it passes from the outlet. The discharge of the liquid is controlled by the dispensing taps of the system to which it is attached. When the cleansing solution is exhausted from the inner container, the valve system closes and the remaining water in the main tank is then forced through the system to purge the lines of cleansing liquid and dissolved deposits.

Abstract: A two-way ball valve including a housing having an open interior chamber or space with opposed inlet and outlet openings, apertured ball seats operatively positioned in the housing at the junctures of the inlet and outlet openings, a ball in the chamber floatingly seated between the ball seats and in liquid sealing engagement therewith, an axial flow bore through the ball, the ball being rotatably positionable to open and closed positions, and a large bore or opening in the body of the ball in the nature of a side channel intercommunicating the axial flow bore and the interior space in the housing, and with the valve in open position permitting fluid to circulate freely within the housing to flush the housing space and thereby prevent formation of contaminated dead spaces in the valve.