Abstract: A housing is divided into two chambers. A tube connects the two chambers. The end of the tube forms a valve seat on each end. The valve seat in one chamber angles upward and the valve seat in the opposite chamber angles downward. A flapper valve is attached above the top of the valve seat which angles upward, and at the bottom of the valve seat which angles downward. Gravity acting upon the flapper valves will hold one in the open position and the other in the closed position unless it is opened by a flow of fluid. Turning the housing upside down will reverse the position of the flapper valves so that the permitted fluid flow will be reversed.

Abstract: In order to enable a piston cylinder unit 1,2 with air entry through a hollow shaft 6, to be operated in either mode of operation with a single type of shaft, it is proposed in accordance with the invention to manufacture the shaft 6 in three parts, namely an upper air inlet portion 6a, an intermediate portion 6b which provides access for air to the cylinder via one or more apertures 18, and an operating end portion 6c. These three parts are threaded together and sealed by seals 21 and 24. Captive nuts 3 and 8 are provided at both ends of the cylinder so that the cylinder may be attached to a yoke 4 by either end, with the opposite end carrying a bearing 9 for the air inlet portion 6a of the shaft. If it is desired for the piston to operate in the opposite mode of operation, the portions 6a and 6c are interchanged and the cylinder is attached to the yoke using the captive nuts 8 rather than the nuts 3.

Abstract: A four-way valve with a built-in flow control function which is convertible between a two port meter-in mode and a two port meter-out mode; and, alternatively, from a two port meter-out mode to a three port meter-in mode.

Abstract: A soil aerating apparatus comprising a towing vehicle, a soil aerating device comprising a drum, tines extending radially from the drum, and a frame for supporting the drum for rotation about a horizontal axis. The frame includes a forward end with a draw arm, and the forward end is pivotally attached to the towing vehicle so that the frame is raised and lowered by moving the draw arm. The apparatus also includes a mechanism for moving the draw arm comprising a hydraulic cylinder including a piston rod and connected between the draw arm and the towing vehicle, and a valve operably connected to the cylinder for extending and retracting said piston rod. The valve includes a valve member movable between a position wherein the valve extends the piston rod, a position wherein the valve holds the piston rod in a fixed position, a position wherein the valve retracts the piston rod, and a position wherein the valve permits the piston rod to extend or retract in response to movement of the draw arm.

Abstract: A solenoid valve has a housing in which is disposed a coil, a sleeve valve and a plurality of hydraulic fluid passages. The passages are formed in a cylindrical core which is integral with and extends axially from an end wall of the housing. The sleeve valve is slidably mounted on the core and has a pair of annular recesses which are selectively positionable by valve movement to interconnect various combinations of passages for controlling hydraulic fluid flow. The sleeve valve has a metal ring secured thereto so that the sleeve valve will be moved in response to electric current flowing in the coil which surrounds a portion of the sleeve valve.

Abstract: A combined inlet and outlet fitting for a fluid handling mechanism comprising a block having an inlet passage and an outlet passage having corresponding one ends adapted to be connected to the mechanism and the opposite ends thereof extending to the same one longitudinal end of the block. A coupling is attached to said one end of the block so that it can be moved arcuately relative to the block. The coupling has inlet and outlet ports connected to said inlet and outlet passages, respectively. Fastening means are provided for releasably securing said coupling in fluid-tight sealed relationship with said block.

Abstract: The invention relates to a valve which can be assembled in two directions at right angles. It has a valve body (20), two sleeves (21 and 22) for connection to two pipes, an obturator (10) and a spindle (11) for controlling the same.According to the invention the valve body (20) is divided in two halves (31 and 32) by a plane inclined at 45.degree. to the axis of the spindle (11) such that said two halves can be assembled either with the axes of the sleeves (21, 22) aligned or with the axes of such sleeves orientated at 90.degree. with respect to each other.

Abstract: A three-way rotary plug valve comprising upper and lower radial arms carried on top and bottom shafts and supporting an integral arcuate closure member between them. The upper shaft extends through a bearing in the top closure and carries a sector position indicator having an arcuate outer surface which overlies and is coextensive with the arcuate closure sealing surface so that the precise position of the closure is apparent at all times. Marks on the top cover depict the locations of the flow passages and cooperating stop means on the cover and the position indicator prevent complete blockage of the inlet passageway from the pump.

Abstract: A tire cap pressure gauge for mounting upon a tire valve stem and measuring tire pressure has a housing, a manually operated plunger extending axially through the housing, a spring extending about the plunger, a piston biased by the spring and having indicia, and a transparent insert member containing said spring, piston and plunger within the housing and having an internally threaded bore for mounting about the periphery of a threaded valve stem. The housing has multiple windows with indicia proximate thereto for viewing the translational position of the piston through the transparent insert member. Two embodiments show a lightweight, compact and easily assembled pressure measuring cap having sealless construction which utilizes close clearances and sharp corners to minimize leakage airflow. A small but insignificant amount of air leaks past the piston, providing an audible signal that the plunger is sufficiently depressed to provide an adequate pressure reading.

Abstract: A solenoid control valve comprising a valve body enclosing an armature and reversible valve means including a valve seat adapted to be received within the valve body including at least one flow passage and a movable valve closure element such that when said valve seat is received in one orientation the solenoid control valve is of the normally open variety and when inserted in an opposite orientation said solenoid control valve is of normally closed variety.

Abstract: An electro-hydraulic proportional control valve includes an electro-hydraulic pilot valve, an inlet pressure reducing valve, and a directional control valve. The electro-hydraulic pilot valve receives an electrical input signal and provides a hydraulic signal to the directional control valve in response to the electrical signal. The inlet pressure reducing valve modulates fluid flow from a pump to the directional control valve to maintain a constant pressure drop across the directional control valve under all conditions. The directional control valve includes a directional control valve spool which shifts between a neutral position, a leftward displaced position, and a rightward displaced position in response to the hydraulic signal from the electro-hydraulic pilot valve. The directional control valve spool includes a range adjustment device for adjusting and setting the flow rate through the directional control valve.

Abstract: A mixing valve adapted for proportioning hot and cold water and for initiating and terminating flow. The valve body has fluid passages terminating in spaced apart hot and cold water inlet ports and an outlet port to a circular valve seat. A generally cylindrical closure member is rotatable about its axis within the valve body with one end overlying the valve seat so as to cover and seal the inlet ports in a closed position. The closure member has a particularly configured recess such that upon rotation of the closure member from the closed position the recess progressively overlies and seals the inlet ports to initiate and provide a mixing of flow. A sequence of flow from cold to warm to hot is assured by a stop which is adjustable to preset a maximum temperature of outlet flow. The closure member can be easily modified for installations where the hot and cold water inlet pipes are reversed from their conventional relative positions.

Abstract: An improved method and apparatus for producing a dispersion of substantially immiscible liquids which employs a conduit having an upstream section divided into first and second channels of variable length and a downstream section for mixing the liquids. The apparatus also includes means for varying the length of the first and second channels and means for flowing the liquids separately through the channels whereby the liquids mix in the downstream section of the conduit to form the dispersion. In accordance with one embodiment, a conventional mixer-settler is modified to include the conduit mounted at an upstream end of the settling chamber so that its inlet is adjacent the mixing chamber and its outlet is approximately at the same height as the organic-aqueous interface in the settling chamber.

Abstract: The invention pertains to improved single handle mixing valves suitable for use in back to back installations, as for example tub/shower valves in an apartment building or hotel. In such installations it is important to provide for proper orientation of valve water mix control parts so as to prevent the water mix from being uncomfortably or dangerously hot in the initial phase of valve opening. The invention provides structure and arrangement such that proper orientation can be achieved by a simple re-orientation or reversal of a part or parts exteriorly of the valve body.

Abstract: The device comprises a steam-escape duct (1) terminated by a valve-seat (3, 4). A shut-off surface (71, 72), realized in a cap (65) at the bottom of an axial cavity (8) slidably mounted on the duct (1), rests, in the service conditions, on the seat (3, 4). The cap (65) is weighted such that its center of gravity is located below the seat (3, 4). The axial cavity (8) is connected to the outside by two eccentric vents (70) causing the cap (65) to rotate by reaction of the steam which traverses them as soon as the cooking-pressure is reached.The device comprises an element (73) permanently attached to the cap (65) and manually displaceable between two positions each of which determines a different lifting pressure for the cap (65) in relation to the duct (1).Use for permitting easy adaptation of the cooking pressure to the kind of food.

Abstract: An electrohydraulic control arrangement comprising at least one terminal plate having an inlet port connected to a pump pumping fluid under pressure from a tank and an outlet port connected to a return conduit leading to the tank and a plurality of consumer plates having consumer ports connected to consumers of pressure fluid. All plates are arranged side by side and held in abutting relationship by tightening screws extending through axially aligned bores through said plates. The plates are further provided with three axially aligned fluid channels therethrough, one to be connected to the inlet port and the two others to the outlet port. The selective connection of the fluid channels to the respective ports is accomplished in the terminal plate by a control slide movable by auxiliary valves, one of which is controlled by an electromagnet and by an additional control slide in each of the consumer plates, the position of which is controlled by two additional auxiliary valves.

Abstract: This mixing valve has a spherical plug to be operated by an operating rod, having communicating inlets and outlets which differ from one another each as to number and arrangement, formation and/or in size, so that the operating direction for varying the mixing ratio is reversed when the plug is rotated 180.degree..

Abstract: A pressure-medium connection between a valve block and a load which has at least one double-acting pressure-medium motor. The valve block and load each have two connecting openings for supplying the pressure-medium motor. An interposed sealing plate has through openings in the form of channels which extend in the plane of such sealing plate for connecting the resepctive openings of the valve block housing and load housing. The connecting openings of the valve block housing are offset with respect to the connecting openings of the load housing. In a first operating position of the sealing plate, the control channels therein connect the first connecting openings of the valve block housing and load housing and also connect the second connecting openings of the valve block housing and load housing.

Abstract: A solenoid valve having a valve body and a magnetic head with a chamber arranged between a pair of magnetic cores. A movable armature is provided in the chamber and has a sealing member movable therewith between open and closed positions relative to a passageway through one of the magnet cores. A spring is provided for biassing the armature and, accordingly, the associated sealing member toward one of the two positions thereof. The force of the magnetic field generated by the electrically energizable magnetic coil encircling the magnet cores is greater than the return force of the return spring.

Abstract: A bimodal, non-venting pneumatic relay senses the presence or absence of a first pressurized fluid and controls the supply or temination of a second pressurized fluid to associated equipment. The relay includes a segmented housing defining plural grooves which accept annular seals, a valve stem against which the seals seat and a reversible piston. The reversible piston can be selectively oriented and installed to provide either, manual rest operation to interrupt the supply of the second fluid if the first fluid supply is interrupted, the relay requiring manual resetting to reestablish supply of the second fluid, or automatic reset operation, wherein restoration of the second fluid supply is achieved automatically if the first fluid pressure is re-established subsequent to an interruption.

Abstract: A housing/piston mechanism for sensing a control fluid pressure and shifting a valve element in response thereto. The piston mechanism comprises a first piston having an internal bore in which is positioned a second piston, and a third piston for use in one specific orientation within the piston housing. Varying ranges of fluid pressure sufficient to actuate the piston mechanism are accomplished by positioning the piston mechanism within its piston chamber in varying orientations so that the effective piston surface area exposed to a control fluid is dictated by the specific orientation of the piston mechanism within the chamber. In one orientation, the effective fluid pressure surface area is that of the larger piston member. In a second orientation, the effective surface area exposed to the sensing fluid is a first surface of the smaller piston carried by the larger piston. In a third orientation, the effective surface area exposed to the sensing fluid is that of the opposite end of the second piston.

Abstract: A multiple-mode hydraulic tracer valve which is convertible from mode to mode by the use of a shiftable stylus and a transmission whose locus can be shifted relative to the spool valves of the tracer valve without changing the relative settings between the spools and the sleeves of the spool valves.

Abstract: A swing check valve having a generally cylindrical body with a fluid passageway extending therethrough, an annular resilient seat molded in place within the passageway and oriented normal to the passageway axis and a clapper assembly pivotally mounted for rotation about an axis normal to the passageway axis. The clapper assembly includes an arm removably connected to a shaft extending through the body and a generally circular valve loosely mounted to the arm and adapted to engage the seal. The shaft is disposed for rotation within a bore extending completely through the body and a lever is removably attached to the external end of the shaft to permit manual operation of the valve. In order to prevent the valve from slamming shut in the event of a sudden flow reversal, it is spring biased toward a closed position with a spring attached to the lever.

Abstract: A piston mechanism for sensing a control fluid pressure and shifting a valve element in response thereto. The piston mechanism comprises a first piston having an internal bore in which is positioned a second piston. Varying ranges of fluid pressure sufficient to actuate the piston mechanism are accomplished by positioning the piston mechanism within its piston chamber in varying orientations so that the effective piston surface area exposed to a control fluid is dictated by the specific orientation of the piston mechanism within the chamber. In one orientation, the effective fluid pressure surface area is that of the larger piston member. In a second orientation, the effective surface area exposed to the sensing fluid is a first surface of the smaller piston carried by the larger piston. In a third orientation, the effective surface area exposed to the sensing fluid is that of the opposite end of the second piston.

Abstract: There is provided a control valve arrangement for dental equipment which comprises a plurality of modular type assemblies having at least three functional zones with the modules including inter-connecting passageways and disposed so as to handle a plurality of separately controlled pressurized media. Provision is also made to rotate a particular module about an X axis to modify the operation of that module.

Abstract: The invention relates to a method and a pneumatic system which permit the definition of the logic equations of the various sequences of a machine cycle and the assembling of the various components processing said logic equations by juxtaposing them one after another along a same line with automatic setting up of certain interconnections between the components through the medium of the bases supporting said components. Furthermore the structure of said bases permit the juxtaposition on the same line of several functional components such as storage modules and logic modules.

Abstract: An assembly of plate members for forming a commutator valve for hydraulic devices of the expanding-contracting pocket type, such as hydraulic motors. The assembly includes a first end plate, a second end plate and a plurality of intermediate plates therebetween. The first end plate includes first and second arrays of fluid passageways for communicating with expanding and contracting fluid pockets, respectively, during operation of the motor. The intermediate plates may be assembled together in either a first or a second alignment depending upon the desired direction of rotation of the hydraulic motor. The intermediate plates are designed such that in the first alignment they direct high pressure fluid from a high pressure port to the first array of passageways and low pressure fluid from the second array of passageways to a low pressure port. The output shaft of the hydraulic motor thus rotates in one direction.

Abstract: A combination pressure regulating and flow control valve having a first fluid passage interconnecting an upstream port and a downstream port. An adjustable pressure regulating valve is mounted in the first fluid passage to provide a reduced pressure at the downstream port. An adjustable flow control valve is mounted in said first fluid passage for selective provision of either a meter in or meter out action on fluid flowing through said first fluid passage. In parallel with said flow control valve is a spring biased check valve for selective provision of free flow in a direction opposite to the metering action of the flow control valve. A parallel second fluid passage in the valve interconnects the upstream port with the downstream port. Mounted in the second fluid passage is an adjustable, spring loaded pre-exhaust valve which is vented to the upstream port.

Abstract: An interconnecting unit for reliably establishing compact and readily rearrangeable connections between the components of a fluid pressure-operated system comprises a matrix block with primary and secondary sets of non-intersecting passages adapted for connection to system components has linking passages joining each primary passage with every secondary passage, communication and flow-control between the so-joined passages being determined by the introduction of flow-controlling plug members selectively into the associated linking passages.

Abstract: A combination pressure regulating and flow control valve which includes a valve body and cover means having an upstream port and a downstream port, and a fluid passage interconnecting said ports. An adjustable pressure regulating valve means is operatively mounted in said fluid passage for regulating the pressure of fluid which enters from the upstream port. In parallel with said pressure regulating valve means is optionally mounted a spring biased check valve means to allow free flow back to the upstream port if the pressure regulating valve is closed to such flow. An adjustable flow control valve means is operatively mounted in said fluid passage downstream of said regulating valve means for providing a metering action on fluid flowing through said fluid passage. In parallel with said flow control valve means is a spring biased check valve means.

Abstract: Manifold assembly having a plastic body with intersect flow passages and valve members for controlling communication between the passageways. Stops limit the movement of the valve members between predetermined positions, and the valve members can be removed from the body and reinstalled in reversed position to provide fixed communication between certain of the passageways. Externally threaded nipples are provided for connecting the assembly to external fixtures, and resilient sleeves are inserted between the valve members and the body to form fluid tight seals.

Abstract: An airless spray gun reversible spray nozzle unit is provided adapted to replace the normal or standard fixed spray position unit without any modification of the external spray head. The external spray head normally positions and holds the fixed position spray nozzle unit in spray position in the airless spray gun. The present adaptation is made possible by means of a floating or sliding female ferrule axially movably positioned and slideable intermediately between a pair of spaced apart keyed flanges defining the unit size which act as stops therefor and assures a leak-proof machined fit of the reversible nozzle when the inventive spray nozzle unit is positioned to spray, or in reversed position so the orifice of the nozzle can be backwashed and freed of binding occlusions.The size, weight and form of the unit adds substantially no increase in weight or volume to the conventional fixed position airless spray head spray nozzle unit and is easily and quickly manually reversed when desired.

Abstract: A single-ported double-seated valve mechanism is a valve body means with an inlet and outlet communicated by a flow passage and a chamber for receiving valve trim. A bonnet is secured to the valve body means. Valve trim is fixedly secured to the bonnet and positioned within the chamber. The bonnet and valve trim may be removed from the valve as a unit. An outwardly extending portion of the bonnet is sized to fit within the valve body wherein the valve body serves as a support or vise.

Abstract: A hydraulic circuit unit comprises parallel top and bottom faces and a side face for receiving a valve assembly. At least four passageways extend between the top and bottom faces and are perpendicular to them. The ends of the passageways open through the faces and the passageways are arranged with one at the center of a circle and the others regularly spaced around the circumference of the circle so that the unit may be rotated about the center of the circle to align the passageways with those of an adjacent similar unit in a plurality of positions. Connections extend between at least two of the passageways and a valve assembly positioned on the side face.

Abstract: A mechanical actuating device for hydraulic control valves having complex control functions, which can be assembled from individual units in a modular system, each of which has valve bodies which can be operated by longitudinal displacement in a housing that can be joined to the housing of the adjacent module. The actuating device for each module has a cam control member rotatably mounted in a cam housing which can be placed on the module housing and which can be brought into engagement with the ends of the valve bodies protruding from the module housing. The cam control members of all individual modules are disposed with aligned axes of rotation, and a coupling is provided for the co-rotational joining together of the cam control members of adjacent modules in selectable relative angular positions to one another.

Abstract: A valve having a closure element in the form of a tapered plug normally maintained by gravity on a vertical rod extending loosely into a bore in the plug. Flow of fluid through the valve in excess of a predetermined rate acts on a flow-responsive surface of the plug to move the latter into engagement with a valve seat, thus blocking further flow. The construction is particularly suited to close control of the flow rate at which closure of the valve occurs. The size, shape, weight and position of various elements influences the magnitude of the flow rate required for closure and may be tailored to effect closure repeatedly at a virtually exact desired flow rate. One embodiment includes means for selectively changing the shape of the flow-responsive surface, and thereby the flow rate at which closure occurs.

Abstract: A hydraulic control valve assembly for use in an excavating vehicle to control the hydraulic motors which control the slew movement, boom, dipper and excavating bucket of the vehicle.The assembly comprises two pairs of valves mounted in a base structure, each pair of valves being controlled by an operating lever mounted on a bracket. The bracket is connected to the base structure by a bolt and a universal joint and to the valve spools by links, the connections between the links and the bracket comprising universal joints.The operating lever is moved in one direction to operate one of the valve spools and in another direction to operate the other valve spool. By slackening the bolt and rotating the bracket, the directions in which the operating lever is moved to operate the valve spools is also rotated.

Abstract: A valve embodying combustion techniques for burners, especially the control technique for maintaining the fuel-to-air ratio at an optimum value over the entire range of low combustion to high combustion which ratio has close relation to nitrogen oxide emissions causing air pollution, to the consumption of fuel gas and to the safety and stability of combustion per se. The valve is installed mainly in the gas feed channel for a burner to freely regulate the rate of flow of gas to the burner accurately in conformity with the flow rate characteristics of air and to thereby provide an optimum fuel-to-air ratio. The valve is very useful in reducing nitrogen oxide emissions, saving energy and ensuring safety.

Abstract: This spool-valve distributor, comprising a pair of pistons producing opposed actions and two end covers formed with passage means for the circulation of the piston control fluid, has an assembling face formed with grooves adapted to receive a seal or gasket interposed between said face and the base member rigidly connected to the hydraulic or pneumatic device actuated by the distributor, some of said grooves being provided with lateral ribs, whereby positioning the seal or gasket on one or the other side of the relevant rib permitting of sealing said distributor body in relation to base members of different standards and dimensions.

Abstract: Installed co-axially in the valve body, along its axis, are two identical sockets with central holes in their bottoms, the holes forming seats closed by closing elements. The sockets are provided with annular seals which divide the valve body into three chambers, viz., an inlet chamber which receives the fluid under pressure, an outlet chamber communicating with the output element and a return chamber for draining the fluid from the output element back into the system. The sockets can be installed with their bottoms directed either towards each other to form a "normally-open" valve or away from each other to form a "normally-closed" valve. The closing elements are accommodated in cages and operated by a drive such as an electromagnetic drive. The critical limits of valve operation are set by springs.

Abstract: Pneumatic logic system.The logic chain is established by juxtaposition of logic modules each of them being provided with a selecting organ having at least two positions allowing to modify the circuit diagram.Advantageous system for the sequential control of machines by pneumatic way.

Abstract: An in-line ball valve having a locking device which permits the positioning of the valve member to a set position by operation of a valve handle with the valve member being locked in this position against any creeping movement by reason of flow-induced forces acting on the valve member. The valve also includes a handle design which permits the handle to be positioned on the shaft of the valve member in eight different handle configurations to provide for simplicity of installation and ease of adaptability to push-pull controls.

Abstract: The invention relates to a shower control valve assembly having the feature of a casing with optionally reversible hot and cold inlets on opposite sides thereof. A replaceable cartridge is insertable into the casing. The cartridge has a mixing valve disk rotatably mounted therein which has first and second indexed starting positions displaced 180 degrees from each other to facilitate th optional choosing of which of the two casing inlets is to be connected to the hot water supply pipe and which is to be connected to the cold water supply pipe. The disk has first and second ports cooperable with two internal valve openings in a manner such that when the disk starts from one of its two indexed positions which corresponds to a particular one of the valve openings being connected to the hot water supply, the disk functions sequentially to draw (1) cold (2) mixed temperature and (3) hot water from the two internal valve openings and route it to the casing discharge outlet.

Abstract: A valve plug or valve seat combination having a large number of small fluid conducting passages in a multitude of horizontal planes and comprised of a stack of identical stampings having alternate sectional patterns consisting of a trapezoidenal vertical opening in some and slotted radial opening in other sections and which, when circularly displaced to one another, form internal vertical fluid conducting passages together with said horizontal fluid passages, both vertical and horizontal passages being interconnected.

Abstract: A faucet valve to control the volume flow of hot or cold water, such as in a sink fixture, includes a housing having a hollow chamber, a cap removably attached to said housing and defining a passage offset from the axis of the chamber, and a stem rotatably disposed within the housing and having an inlet passage offset from the axis of rotation of the stem. A resilient grommet seal is disposed in the passage in the cap and is in sliding sealing engagement with the stem. The cap can be removed from the housing to replace the grommet, or to reverse the direction of rotation of the stem member between the open and closed positions, whereby the faucet valve can be interchangeably used in the hot or cold water lines of a sink fixture.

Abstract: A universal logic body block includes a number of identical cavities having accompanying passageways of identical number and pattern. Each single cavity forms the basic housing for installation of various valve components which may perform a desired logic function AND, MEM, DIF, OR, NOT or TIM. A primary universal insert fitted within an above-described cavity of the universal logic body block in combinaton with various other valve elements will provide an AND, MEMORY, DIFFERENTIATOR or NOT logic function. A universal valve member may be fitted within a cavity in a first manner in combination with other components, to provide the logic functions, NOT and DIFF. The universal valve member may be fitted within a cavity in a second manner in combination with other components to provide the logic functions AND and MEMORY.

Abstract: Lubricant dosing device for double-action, two-conduit central lubricating systems, wherein a housing has therein two piston chambers, an outlet control chamber, two inlets for a pressurized lubricant, and two outlets for predetermined dosed amounts of the lubricant. One chamber is for a control piston and the other for a dosing piston; the longitudinal axes of all three chambers preferably pass through corners of an imaginary triangle perpendicular to the main axis of the housing.

Abstract: A universal logic body block includes a number of identical cavities having accompanying passageways of identical number and pattern. Each single cavity forms the basic housing for installation of various components to perform logic functions AND, OR, NOT and TIM. A primary universal insert fitted within the above-described cavities of the universal logic body block in combination with various other valve elements will provide an AND, or NOT logic function. A universal secondary seat may be fitted within a cavity in one manner in combination with other components, to provide the logic functions AND, OR and NOT. Additional specialized inserts are provided for insertion into a cavity of the universal logic body block in combination with various valve elements to provide the TIM logic function or the OR function. Various logic circuits can be formed in one block by means of connections between separate logic devices.

Abstract: A valve body includes a base section having an inlet and an outlet and means forming a valve seat therebetween. A flexible diaphragm is supported for movement relative to the valve seat and includes a center by-pass port which is opened and closed by a valve member supported for axial movement by a closure section of the valve body. A pin-like actuating lever is pivotally supported by a flexible seal secured to the closure section and has an inner end portion projecting into an opening formed within the valve member. An elongated U-shaped bimetallic actuating element is mounted on the closure section generally parallel to the lever and includes a movable head portion. The bimetallic actuating element is preferably connected as a resistance in series with an electrical load, and a spring is compressed against the outer end of the actuating lever to cause rapid snap-action movement of the lever, and the valve member in response to slower movement of the head portion of the actuating element.

Abstract: A reciprocating sliding gate valve with tubular housing and one movable and one stationary gate having multiple fluid conducting ports, which overlap with solid wall partitions spaced between said ports when the valve is closed following sliding, reciprocating displacement of the movable gate, and wherein the interface between the stationary gate and the tubular body bore is sealed by the usual pipe line flange gasket; both gates and other internal parts being readily removable through one end of the tubular housing bore for ease of assembly.