Abstract: A flow control device is disclosed which includes a housing having a plate or partition oriented generally transverse to the fluid flow direction. The partition has a central opening and a plurality of flow passages disposed in a circular array about the opening. The device also includes a generally T-shaped elastomeric element having a stem received by the central opening in the partition and a disk-shaped flange projecting transversely from the stem. The flange has a lower, beveled, annular surface overlying the flow passages and defining with the partition a variable flow area. Variations in fluid pressure causes the beveled portion of the flange to deflect accordingly. The flow area is thereby varied so that the flow rate is maintained substantially constant irrespective of pressure variations.

Abstract: A gas pressure regulator for a butane lighter or other gas burner is created by the interaction of two superposed washers and an underlying flat retainer disc. A compressed elastomeric washer exerts pressure on a more rigid washer having a distal textured face in contact with an opposing face of the retainer disc. Gas flows through the interstitial array between said textured face and the opposing face of the retainer disc and a net pressure differential is effected.

Abstract: An adjustable flow divider for a mass flowmeter useful in shunting a portion of a fluid flow from a main supply line. The adjustable flow divider includes a porous tube (32) having a plurality of longitudinally extending projections (34) on the inner surface thereof. An externally threaded screw plug (36) is adjustably positioned within the porous tube forming a seal with the projections and exposing to fluid flow an area of porous material related to the position of the plug within the tube. The plug's position is adjustable from the outlet end of the flow divider while the divider is in use.

Abstract: Apparatus is included in a system for controlling the flow of intravenous fluid from a source to a patient. Such apparatus is manually adjustable to vary the rate of such fluid flow. Desired rates of fluid flow may also be set in such system when the apparatus is included in the system. The system then overrides any previous manual adjustment of such apparatus and adjusts the rate of fluid flow in accordance with any such setting. When a desired rate of fluid flow has been preset into the system, the system then operates to adjust the rate of fluid flow in an instantaneous basis so that the desired rate of fluid flow maintained.The apparatus is removably disposed in the system for controlling the flow of fluid to the patient. Even after the adjustment by the system of the rate of fluid flow in accordance with any setting, the apparatus may be removed from the system to provide a rate of fluid flow in accordance with the manual adjustment of the apparatus.

Abstract: A drag ball valve (10) that can variable regulate the pressure drop to which the fluid passing therethrough is subjected while maintaining the fluid velocity nearly constant is disclosed. To accomplish this, a series of fixed disks (34) having apertures (36) therein and rotatable disks (42) having apertures (44) with flange-like projections (46) therein are aligned so that either an unobstructed straight fluid passage through the apertures in both types of disks is created or the fluid is diverted by the flange-like projections (46) causing pressure reductions due to a variable number of flow direction turns. By varying the number of fixed disks (34) and rotatable disks (42) used, and by varying the number of rotatable disks (42) that are so aligned, any number of flow direction turns and associated pressure drops from zero pressure drops to the total number of rotatable disks (42) used can be achieved.

Abstract: The solenoid valve of the invention comprises a housing having a fluid flow opening passage therethrough. A movable assembly is subjected to the opposing actions of a return spring and an electromagnetic coil. The movable assembly comprises an armature whose abutment against a guide defines an end position and a needle fixed to the armature, which defines with the opening a passage of minimum non zero cross-sectional area when the assembly is in the end position.

Abstract: A fluid flow control device, particularly for use in connection with valves used in the control of fluids under high pressure, is disclosed. In the new structure, the valve trim includes a form of flow restrictor, which serves to limit flow velocity and which causes the fluid pressure to be reduced in a sufficient number of discrete stages to minimize noise and cavitation. The new flow restrictor comprises an axial stack of annular discs, each provided with a plurality of annular baffle ribs projecting from its opposite end faces. The annular baffle ribs on one side of the disc are slotted along a number of equally spaced radii, and the ribs on the opposite side of a disc are similarly slotted, but along radii offset from the first set of radii. When a series of these discs is assembled in a stack, downwardly facing ribs of one disc fit between upwardly facing ribs of a disc next below, providing a series of annular passages interconnected by radial slots.

Abstract: A regulating valve capable of precisely controlling minute amounts of gaseous or liquid fluids following an electronic, pneumatic or manual command wherein the fluid is throttled between a pair of flat, parallel plates positioned in respect to each other through the use of hydraulic means.

Abstract: A fluid resistor with a fluid tight structure including two planar members having a surface of each contacting in close proximity. One of the planar members has a laminated structure including a substrate and at least one thin layer of substantially uniform thickness formed on the substrate. A groove extends through the layer. The groove and the surface of the other planar member define a capilliary passageway of substantially constant depth for restricted fluid flow.

Abstract: A fluid flow restrictor for use in a high pressure valve or the like which comprises a series of closely interfitting concentric cylinders alternately attached to the valve seat and an axially movable valve plug of the valve. In one advantageous embodiment of the invention, various arrangements of slot openings are formed through the several cylinders. The slot openings may be of any geometric shape, for example, rectangular or trapezoidal, and are of sufficient volume to act as expansion chambers for a compressible fluid. The openings of each cylinder communicate with the openings of an adjacent cylinder by various overlapping relationships between openings or by viscous friction flow paths between the cylinders to form restricting flow paths therebetween. Axial displacement of the valve plug will move the interfitting cylinders with respect to one another to vary the flow path dimensions between the slot openings of the cylinders.

Abstract: A high energy loss fluid flow control device suitable for use with high temperature, abrasive coal liquids, gases and the like comprises an elongated body having an axially extending bore with longitudinally spaced apart inlet and outlet passages in communication with the bore. An elongated valve member is mounted for sliding axial movement within the bore between open and closed positions. The valve member includes an outer surface spiralling about a longitudinal axis from a maximum diameter portion adjacent one passage toward a minimum diameter portion adjacent the other passage. The bore of the elongated body includes a surface in close facing relation with the spiralling surface of the valve member and this surface also is spiralled about a longitudinal axis from a minimum diameter portion towards a maximum diameter portion.

Abstract: A new and improved fluid restrictor means for use in a valve structure, as a backpressure plate, or the like and generally comprising a plurality of close-fitting mating cylindrical parts each of said parts including a plurality of openings spaced across the surface thereof. The mating parts are rigid in construction and arranged and configured whereby they are in a contacting relationship and the openings of contiguous mating parts are in an overlapping relation to form restricting orifices for flow communication between complementary openings. The volume of each of the openings is sufficient to form an expansion chamber for high pressure fluid flowing thrugh the restrictor means. The disclosed fluid restrictor means provides a structure which is easily arranged according to precise engineering specifications for a particular application.

Abstract: A fluid operated valve device which effects a time delay in the shifting of a main valve spool. Pressurized pilot fluid is metered at a controlled rate through an air filter and a spiral groove which is restricted in size to delay the pressure build up of the fluid. When the pressure builds up sufficiently, a timer piston is shifted to break its seal with the main valve spool so that fluid can pass through the piston into a pressure chamber. The fluid pressure in the chamber shifts the main valve spool to control application of fluid to the load. When the pilot pressure is relieved, fluid flows at a high speed along a return path that passes the base of the air filter to create a suction effect which extracts dirt from the filter and purges it from the system. The pressure reduction allows springs to return the main valve spool and the timer piston into sealing position.

Abstract: In a drip level irrigation emitter unit having flow restricting means, a control mechanism, inlet and outlet control chambers of the control mechanism, resiliently flexible membrane sealingly separating the control chambers, the membrane being displaceable with respect to the flow restricting means, the inlet and outlet chambers respectively communicating with an inlet and an outlet of the flow restricting means, the outlet chamber being formed with an outlet aperture of substantially smaller area than that of the membrane, the arrangement being such that upon the liquid pressure in the inlet chamber exceeding the liquid pressure in the outlet chamber by a predetermined amount, the membrane flexes elastically towards the outlet aperture so as to define, with a rim of the aperture, a restricted outflow path thereby limiting variations in the outflow rate.

Abstract: A metering apparatus for controlling the rate of closure of a pressure-actuated valve of a type normally used in irrigation systems. When a pressure-actuated valve is closing, fluid from a supply line must flow into a pressure-actuating chamber, gradually filling it to force the valve's plug member against its seat. The metering apparatus is a compressible spring through which fluid must flow to enter this pressure-actuating chamber. As the valve closes, it compresses the spring through which the fluid must flow, thereby restricting the rate of flow into the pressure-actuating chamber. This reduction in flow reduces the rate at which the valve's plug member approaches its seat in an exponential manner, allowing rapid closure at first which is reduced considerably as the plug approaches its seat.

Abstract: A flow regulator for controlling the flow of fluid, particularly water, to compensate for changes in pressure. The regulator comprises a fitting having an elastically-deformable membrane providing flow passages through the fitting. Pressure variations deform the membrane to modify the flow area of said passages to automatically compensate for the changes in pressure and thereby reduce or eliminate pressure waves arising in the pipe. The membrane comprises a disc-like base, the downstream surface of which is provided with spacer means leaving a star-like pattern of radial passages for medium flow having their outer ends open upstream for admission of fluid to said passages, the size of which is to be reduced by elastic deformation of said base and said spacer means in response to changes in the pressure in the flow.

Abstract: A presettable fluid flow regulator having a body in the form of an elongated sleeve of flexible material and a core within the sleeve having a recess of varying cross section on its outer surface along its length. A ring on the outside of the sleeve having an internal diameter slightly less than the outer diameter of the sleeve is used to squeeze the sleeve against the core to define a flow passage between the body and the sleeve. The volume of flow is determined by the longitudinal position of the ring along the sleeve.

Abstract: A valve comprises a tube having an inner wall surface inwardly stepped to provide a ribbed peripheral seat in a plane perpendicular to the axis of the tube and between inlet and outlet chambers bounded by tube lengths of relatively greater and relatively smaller cross-sections respectively. A washer disk or resilient material sized to fit with peripheral clearance within the inlet chamber is held spaced from the peripheral step base by ribs outstanding therefrom.

Abstract: Apparatus for braking a rotating member which has a fluid pressure responsive brake to which pressurized fluid is supplied for braking the rotating member, an anti-locking device interposed between the brake and the source of supply of fluid pressure for cyclically decreasing and increasing the fluid pressure supplied to the brake, and a control interposed between the brake and the fluid pressure source for limiting the rate of rise of fluid pressure supplied to the brake. Limitation of the rate of rise of fluid pressure applied to the brake governs reapplication of braking forces by the brake and thereby aids in optimizing brake performance.

Abstract: A hydraulic follow-up for use with a hydraulic system placed between a rotating input member and a rotating output member. The hydraulic system is a hydrostatic transmission for driving a tractor, and comprises a hydrostatic pump and a hydrostatic motor driven by the pump. When the hydrostatic pump is angularly shifted with respect to the input member, the shifting is controlled by the hydraulic follow-up, which also shifts the motor in relation to the output member.

Abstract: A throttle valve formed from two jackets each having through bores. Each jacket includes two groups of bores, one group of bores being equally spaced from each other and the other group of bores having an intermediate bore unequally spaced from the outer end bores. The jackets are rotatable relatively to each other so as to align the bores for maximum and minimum flow.

Abstract: A fluid flow restrictor is described having a long path length capable of sorbing energy with less noise generation than that normally encountered with conventional fluid flow restrictors of short path lengths. The restrictor is adapted for attachment between two adjacent lengths of a pipeline, three forms being particularly described, one of fixed path length and bore, another of fixed path length and variable bore, and a third of variable path length and fixed bore.

Abstract: A regulated flow-reducing device particularly useful for drip irrigation comprises a flow-retarding member disposed in a housing, the member being formed with a circuitous fluid flow pathway defined at least in part by recesses formed in both its opposed faces, and a flat regulator member disposed between the flow-retarding member and the housing inlet such that the inlet face of the regulator member is subject to the fluid pressure at the inlet of the housing. The flat regulator member is in contact with and covers the inlet face of the flow-retarding member except for its inlet end to provide communication between the latter and the housing inlet. The flow-retarding member is made of resilient material so that both its recessed faces are deformable by the inlet pressure whereby the cross-sectional area of the recesses on both faces of the flow-retarding member are varied in accordance with the inlet pressure.

Abstract: A more compact high energy loss device is provided having a series of uniquely formed multiturn labyrinth assemblies which reduce the pressure of a fluid flowing therethrough. The inlet of the labyrinth assemblies is formed according to a substantially circular configuration to have a predetermined inlet area while the outlet is formed according to a substantially scalloped configuration to provide an outlet area greater than the inlet area. The scalloped configuration of the outlet yields an outlet area which is also greater than if the outlet were of circular configuration. The scalloped outlet configuration also makes the labyrinth assembly less susceptible to circumferential thermal stresses resulting from high temperature fluids passing through the device producing high temperature inlet conditions and low temperature outlet conditions.

Abstract: A delay valve comprising a housing including a side wall and opposed end walls and a plug in the housing cooperating with the side wall to define a first and second chamber. A check valve is provided in the plug permitting flow of air in one direction such that air may flow freely from the second through said check valve to the first chamber and is prevented from flowing from the first to the second chamber. The end walls of the housing have openings communicating with the exterior of the housing, and the plug has a peripheral portion that cooperates with the side wall of the housing to define a helical passage communicating with said first and second chambers.

Abstract: Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool, and a poppet therein having a small orifice. A restricted orifice of appreciable, straight longitudinal or helically turned length is used in connection with the spools and the poppet in such a way that, after the power unit for the clutch for first, second, or third speed is filled with fluid, pressure of the fluid in the power unit is raised at controlled rate to its maximum.

Abstract: A valve having stacked disks with alternate circular grooves in the faces thereof to provide a high pressure drop surface in fluid flow transverse to said grooves and ridges. The disks are circular in shape with a circular center opening to provide a central fluid opening when the disks are stacked with the center openings in register. Fluid enters the center opening and flows radially between the adjacent faces of a pair of disks to flow transversely across the continuous circular grooves and ridges.

Abstract: A high energy loss fluid flow control device comprises a housing having an annular wall with an inlet adjacent one end and an outlet adjacent the other end. The housing wall includes an inside surface formed with a continuous helical land and groove defining at least a part of a helical flow passage between the inlet and outlet. A valve member is mounted in the housing for movement toward and away from the inlet and has an outer surface formed with a continuous helical land and groove also defining at least a part of the helical flow passage extending between opposite ends of the member. The land of the valve member projects into the groove of the housing and the land of the housing wall projects into the groove of the valve member forming the continuous helical flow passage extending between the inlet and outlet and means is provided for supporting the valve member in the housing for relative rotation to move toward and away from the inlet to lengthen or shorten the continuous flow passage as desired.

Abstract: A high energy loss fluid flow control device comprising a body defining a chamber in communication with a fluid inlet passage and fluid outlet passage at one end of the chamber; a hollow tubular member mounted in said chamber open at one end adjacent said outlet passage and formed with a helical, internally projecting land extended between said outlet passage and an inlet opening in the wall of said member in communication with said inlet passage, a valve member mounted in said tubular member for axial translation relative thereto including an outwardly projecting helical land extending between an end of said valve member and spaced between adjacent turns of said helical land of said tubular member thereby defining a helical fluid flow passage between said lands extending between said inlet opening and said outlet end of said tubular member.

Abstract: The control valve is provided with a double walled cage and a valve plug slidably mounted between the perforated walls of the cage. The control valve serves to reduce gas-generated noise when used for gas service and to control both cavitation and noise when used in liquid service.

Abstract: A noise abating plug for a fluid control valve includes a perforated sleeve that forms one end portion of the plug and a plurality of spaced apart perforated discs that extend between a hub portion of the plug and the inner wall of the sleeve portion. The perforations in the sleeve and in the multi-perforated discs form a varying number of restrictive passageways for the fluid under control as the plug is moved between its open and closed positions and thereby maintain the pressure reduction occurring at the perforated sleeve and perforated discs at values which minimize the noise created by the fluid as it flows through the valve.

Abstract: A throttle for use in hydraulic drives requiring low flow rate of liquid includes a stationary housing and a rotor located in said housing. In the housing on the side facing the rotor, provision is made for an insert which is mounted with a clearance with respect to the rotor and the clearance serves as a passage for liquid to pass.The insert is made of the material whose linear expansion factor is larger than that of the material the housing is made of.The insert changes its linear dimensions against the liquid temperature variation, the liquid flow rate remains uniformly constant or invariable with the liquid temperature change.

Abstract: A flow control valve having a valve chamber which is adapted to receive fluid under pressure and which comprises a valve member having a surface with a groove therein and an outlet passage terminating at one end in a port in the groove. A resilient element is provided in the valve chamber in confronting relationship with the groove. The resilient element has an aperture in registry with the groove. The resilient element and the valve member are mounted for relative movement so as to change the relative position of the groove and the aperture, and this permits the manual selection of the flow rate. The pressure in the valve chamber urges the resilient element into the groove an amount which is dependent on the magnitude of the pressure. In this way the selected flow rate is made independent of inlet pressure fluctuations.

Abstract: An apparatus for regulating the flow rate of a fluid, comprising a casing having an annular or cone-shaped fluid passage, for radial flow (inwardly or outwardly) between an inlet and outlet which are spaced radially and form unobstructed flow paths to the whole of the fluid passage. The geometry of the fluid passage is defined for a compressible and incompressible fluid so that laminar flow is achieved in the fluid passage. The apparatus further provides a very rapid dynamic response, essentially free of hysteresis, and substantially no internal generation of fluid flow turbulence resulting in a minimum of noise and freedom from cavitation. In an adjustable configuration the apparatus provides a proportional fluid valving function. In a nonadjustable configuration the apparatus provides a laminar flow restriction.

Abstract: A drip irrigation valve comprising an outer member having a passageway and an inner member mounted in the passageway for axial movement. An axially and circumferentially extending rib is provided on a first of the members and cooperates with a confronting surface of a second of the members to provide a helical flow path. Dams are provided in the flow path to increase the resistance to fluid flow. To increase the flow rate, the members are moved axially to take one or more of the restrictions out of the flow passage. To make the valve pressure compensating, one of the member is resilient and can be resiliently deformed by the fluid at inlet pressure to increase the resistance to flow provided by the restrictions.

Abstract: A fluid flow control device is disclosed for maintaining a substantially constant volumetric flow rate in either direction independent of the applied pressure above a predetermined pressure level. The device has a generally cylindrical shape, may be symmetrical about a radial plane of symmetry and comprises an elastomeric member disposed between rigid, slotted end plates. The elastomeric member comprises a central disk portion each of whose faces have axially disposed projections including an outer rim structure, a central boss and a series of spaced flow control segments arranged along a circle lying intermediate the rim structure and boss and defining variable area flow passages. The rim structure and flow control segments define an outer circular channel while the flow control segments and boss define an inner circular channel. The inner channels on opposite sides of the elastomeric member are joined by orifices formed in the disk portion of the member.

Abstract: Devices and methods for preventing conception as well as for general use in variable filtering. For preventing conception at least temporarily the devices and methods provide a selective flow for fluid in a vas deferens with sperm being acted upon at the flow path in a manner which will prevent fluid which flows beyond the selective flow path from carrying viable sperm in numbers sufficient for conception. By regulating the size of the selective flow it is possible to achieve a variable filtering or flow controlling action which is of general utility.

Abstract: A hydraulic dashpot having a pressure tube with a port defining a metering orifice through which fluid is metered upon application of impact forces to a piston assembly slidable in the pressure tube, and wherein the pressure tube is rotatable for adjusting the position of the orifice relative to a spiral valve edge for varying the effective area of the orifice.

Abstract: A valve having stacked disks with alternate circular grooves in the faces thereof to provide a high pressure drop surface in fluid flow transverse to said grooves and ridges. The disks are circular in shape with a circular center opening to provide a central fluid opening when the disks are stacked with the center openings in register. Fluid enters the center opening and flows radially between the adjacent faces of a pair of disks to flow transversely across the continuous circular grooves and ridges.

Abstract: A variable resistance type control valve throttling trim having high resistance, fluid energy absorbing passages formed and controlled between the intersection of a cylindrical valve plug slidable co-operating with a cylindrical valve seatring and wherein the number, length, area ratio and specific fluid resistance are a function of the engaged length of the cylindrical plug portion in respect to the seatring bore and wherein the fluid energy absorbing passages consist of a pattern of slots and grooves radially inwardly penetrating the cylindrical wall of said valve plug and/or radially outwardly penetrating the cylindrical inside wall of said seatring bore.

Abstract: Hydraulic mechanism in a transmission for engaging a clutch for forward or reverse before a clutch for first, second, or third speed. Flow of pressure fluid to the latter clutch is by way of a quick fill spool having a large orifice, a rate of rise spool, and a poppet therein having a small orifice. A restricted orifice of appreciable, helically turned length is used in connection with the spools and the poppet in such a way that, after the power unit for the clutch for first, second, or third speed is filled with fluid, pressure of the fluid in the power unit is raised at controlled rate to its maximum.

Abstract: A movable diaphragm liquid flow control valve in which a retaining member is disposed in the housing upstream of the diaphragm so that when a back-flow occurs the diaphragm is prevented from blowing back along the pipework, within which the valve is disposed, and is guided to prevent it from tilting.

Abstract: A pressure sensitive regulating valve formed of a spring mounted within a conduit in which fluid flow is to be regulated. The fluid flow is regulated by the pressure responsive expansion and contraction of the axially deformable spring whose successive convolutions alternately increase and decrease the free-flow volume of the space surrounding the spring as the spring responds to alternate increases and decreases of pressure exerted thereon.

Abstract: A trickle-flow irrigation valve of the type which is installable through the wall of a garden hose, and having a pressure chamber with an inlet passage from the hose and an outlet passage through a wall of the chamber in which are also formed a shallow channel and an outlet groove in the channel, communicating with the outlet passage. A flat, resilient valve element covers the outlet passage and a substantial portion of the groove and channel. The resilient valve element allows relatively high-volume, flushing flow when water is first received in the chamber, but deforms to the shape of the channel as supply pressure builds up, thus restricting flow to the outlet groove and providing a substantial pressure drop. A high supply pressure will force the valve element into the groove itself, to some degree, and a pressure regulating effect is thereby obtained.

Abstract: Nested concentric sleeves or tubes subdivide flow of fluids through a fluid control valve into a myriad of streams between the valve inlet and outlet which flow through passages that create a high energy loss and pressure drop on the fluid to release the fluid at low pressures without generating noise, permitting cavitation or eroding equipment through which the fluid flows.

Abstract: A combustible mixture of air and minute fuel droplets is produced for supply to the cylinders of an internal combustion engine. This mixture is formed by accurately controlling both the atomization of fuel and the mass flow rate of air over substantially the entire operating range of the engine. These controls are accomplished by introducing liquid fuel into a stream of intake air and uniformly distributing the fuel in the air followed by passing the air and fuel mixture through a constricted zone to increase the velocity of the mixture to sonic. The sonic velocity air at the constricted zone divides the fuel into minute droplets that are uniformly entrained throughout the air stream. The area of the constricted zone and the quantity of fuel introduced are adjustably varied in correlation with operating demands imposed upon the engine.

Abstract: A valve construction for controlling the flow of a fluid therethrough and including a restrictor member that is located in a control chamber and that communicates with the control pilot valve and an interior chamber having access to a pressure responsive diaphragm, the restrictor member providing for sufficient flow of fluid to the interior chamber in relatively large valve sizes to enable the diaphragm to open or close the valve at a reasonable valve closing rate, the closing of the valve being slow enough to prevent the occurrence of water hammer in the system.