Abstract: In a housing to be fastened to the bottom of a flushing tank, a float, which is arranged approximately centrally on a closing member mounted displaceably in the housing, is arranged under a partition extending horizontally in the flush tank. A sealing body is arranged at a lower end of the closing member. The partition forms a unit with a chamber arranged on its underside, and the unit is detachably inserted from the top into the housing, which is open at the top. The present invention simplifies the automatic mounting as well as the inspection of the drain valve and the more universal and therefore less expensive use of the valve housing.

Abstract: An electromagnetic valve, in particular pressure regulating valve for automatic transmissions of motor vehicles comprises a magnet housing, a valve closing element arranged in the magnet housing and having a longitudinal opening and control edges, a valve slider located in the longitudinal opening and having control portions cooperating with the control edges with the valve closing element, the valve closing element being formed as a die cast part and the control edges being formed as a pocket-shaped depressions extending from an outer periphery.

Abstract: A sliding flow controller for controlling flow through a pumping segment used in a fluid delivery system. The flow controller includes a slider that travels along a channel defined by an elastomeric membrane and a variable size groove formed in a rigid component. The slider includes a projecting ball that presses the membrane against the groove. At one end the groove has a maximum cross-sectional area for a maximum flow position and at another end, the groove has no cross-sectional area for a flow stop position. The slider and the pumping segment have respective click stops to impart sensory feedback to the operator when manually operated. A ramped thumb indentation is provided on the exterior of the slider to facilitate sliding movement.

Abstract: Flow restrictor apparatus utilizes a pair of relatively movable disks. One disk includes an output bore communicating with a groove cut into one face of the disk. The groove is generally circular in configuration. The other disk includes an input bore which communicates with the groove in the opposite disk when the two disks are assembled together. Varying the location of the input bore relative to the groove varies the flow of fluid through the apparatus. A pair of O-rings seal the groove and the two disk elements. A second embodiment utilizes a metering disk disposed between two fixed disks. The fixed disks include aligned bores for input and output, and the metering disk includes aligned grooves on the surfaces which face the fixed disks and a bore through the metering disk joining the aligned grooves.

Abstract: A ball valve disclosed herein is low cost and offers a fast and reliable valve operation. Furthermore, the actuating force the ball valve requires, when it is shut off, is small. The ball valve is capable of fine adjustment of the flow. The ball valve comprises a valve casing defining a flow path of a fluid, a valve seat disposed in the midway of the flow path, a valve element which is in engagement with the valve seat or out of engagement with the valve seat, to shut off the flow path or to regulate the flow rate in the flow path, a control rod inserted into the valve casing and movable upward and downward, and a connecting rod, one end of which is rotatably supported at the inner end of the control rod, and the other end of which is connected to the valve element. The valve element comprises a communication path which communicates with both the upstream side of the flow path and the downstream side of the flow path and an on-off means for opening or closing the communication path.

Abstract: A method for remotely controlling flow of gaseous fuel to a burner having an electrically operated electromagnetically actuated modulating valve. The electromagnetic actuator comprises a coil having about one thousand turns of fine wire disposed proximate an annular permanent magnet. Either the magnet or coil may be attached to a moveable valve member which has a resilient poppet biased to close on a valve seat to shut off gas flow. Upon energization of the coil, a magnetomotive force is generated and moves the poppet off the seat to permit flow. Increased current flow in the coil proportionately increases opening of the poppet and movement of a metering member which throttles flow. When the poppet is fully open, flow is reduced to minimum metered level. A single user operated, remotely located potentiometer can be used to effect the proportional control of flow to the burner. In the preferred embodiment the metering member is cylindrical with a varying area grove or recess.

Abstract: A valve which is formed by a face of a valve body and the outlet area of an opening in a counterpart is disclosed. An extension dipping into the opening to ensure smooth evolution of the beginning of opening operation is known. The opening behavior achieved in this manner is not sufficient for all applications. In order to further smooth the evolution of the beginning of the opening operation, a clearance fit is provided between the extension and the opening which is interrupted by a countersink in the extension or in the opening. The countersink is formed and placed in such a manner that it comprises the counterpart of the clearance fit and at least one inclined control edge and, thereby, an adjustable choke which can be controlled in series with the valve. The countersink can take the form of a groove. Valve arrangements for compressed-air systems in motor vehicles represent a special area of application for the invention.

Abstract: A control valve assembly is disclosed having a housing defining at least one valve chamber having an elongated cylinder. A piston is partially disposed within said valve chamber and the valve assembly allows for reciprocating movement of the piston within said valve chamber. A metering device is provided for precise positioning of the piston within the valve chamber.

Abstract: For a shaft seal for a pump, a barrier fluid flow and pressure control method, system, and apparatus providing a manifold having oppositely axially arranged flow and pressure control valves, the control valves having open-ended valve cylinders reciprocally adjustable within flow channels of the manifold, the valve cylinders having elongate flow orifices selectively positionable within the flow channel with said orifice in selective registry with a respective outlet. The extent of registry of the elongate orifice with the respective outlet controls the rate of flow through the valve. The pressure control valve sets the barrier fluid pressure while the flow control valve sets a minimum flow required for the barrier fluid operation.

Abstract: In a preferred embodiment, a fluid flow valve, including: an elongate body having an axially extending cavity defined therethrough and having fluid inlet and outlet ports; a hollow seat assembly disposed in the body for the passage therethrough of a fluid; a shaped first aperture defined through a wall portion of the seat assembly; and a plug selectively axially moveable in the hollow seat assembly and along the shaped first aperture such that the fluid flows into the hollow seat assembly, upwards past the plug into the first aperture, through the first aperture, downwards past the plug, and out of the hollow seat assembly, the position of the plug along the aperture determining rate of flow of the fluid through the valve.

Abstract: Volume ratio and capacity are controlled by slides which are rail guided. The slides are pressure-balanced, axillay and radially. The volume ratio slide has a piston balancing arrangement. The capacity slide has suction pressure acting equally on all sides thereof, consequently it requires no piston balancing.

Abstract: A linearly adjustable fluid damper of the sliding plate adjustable orifice type damper system having a fixed plate with a plurality of specifically arranged hexagonal shaped apertures therethrough and a slidable adjustable plate also having a plurality of specifically arranged hexagonal shaped apertures therethrough. The sliding plate is juxtaposed the fixed plate such that the apertures of the sliding plate overlap apertures of the fixed plate with center lines bisecting the top and bottom sides of apertures in both plates coinciding. The area of the resultant hexagonal composite orifice through both plates varies non-linearly from full closed position to full open position throughout movement of the sliding plate, however, the result is that fluid flow from zero to maximum through the resultant orifice is a straight line relationship with linear displacement of the sliding plate.

Abstract: A micro-valve assembly for providing precise regulation of fluid flow between an input port and an output port comprises a valve body configured to installed with the valve assembly and forming therewith a fluid flow chamber between the fluid flow rate control port and the output port, the valve body having an internally threaded cylindrical portion. A rotatable valve adjustment member has an externally threaded cylindrical portion sized to engage the internally threaded cylindrical portion of the valve body. The externally threaded cylindrical portion of the rotatable valve adjustment member has an internally threaded axial bore. The internally threaded bore of the rotatable valve adjustment member has a longitudinal axis and a pitch finer than that of the externally threaded cylindrical portion thereof.

Abstract: A novel metering valve is used to split the streams in which a continuous fluid stream passes unregulated through the valve along a primary flow path. A second stream is formed by passing a small portion of the fluid in the primary flow path through a passage in a valve seat. The fluid passing through the valve seat is precisely metered by a valve stem which engages the valve seat passage to control the amount of fluid diverted from the primary flow path. Both fluid from the unregulated primary flow path and through the metered flow path flow simultaneously from the valve. The metering valve of the invention has particular use in processes for dividing a condensed distillate stream into a product stream and a reflux stream.

Abstract: A throttle valve is provided with a heater for keeping an external surface of a valve disc and an adjacent thereto internal surface of a flange portion at high temperature to prevent deposition of fine particles contained in etching gas, and thereby the said valve may provide smooth and reliable adjustment of the valve opening over the long period of its operation.The valve controls the flow of gas along a pipe by changing the open area of a fluid passage formed therein through the valve disc 2 which is turned by driving shaft 3 from driving means provided in a driving portion 4. The valve disc 2 is heated with a heating rod 6 mounted therein. Plate-like heaters 20.sub.1 and 20.sub.2 are mounted on the flange portion 1b of the valve 1 to heat the flange portion 1b and valve disc 2. The external surface of the valve disc 2 and the internal surface of the flange portion are heated to prevent adhesion of dust particles thereto. Therefore, the valve disc 2 can smoothly move with no obstruction.

Abstract: A fluid control valve for an inline fluid control system comprising a housing having a fluid inlet and a fluid outlet, the housing having a rectangular shaped fluid passage for fluid to flow therethrough, the housing having a first cylindrical passage located therein and a second cylindrical passage located therein with the first cylindrical passage and the second cylindrical passage located in coaxial alignment with each other, the first cylindrical passage having a first diameter and second cylindrical passage having a second diameter with the first diameter larger than the second diameter and a stepped plunger slidably located in the first cylindrical passage and the second cylindrical passage, the plunger slidable with respect to the rectangular shaped fluid passage to permit one to increase or decrease the area for fluid to flow through the fluid passage, the stepped plunger having an enlarged portion to prevent the stepped plunger from being accidentally withdrawn from the housing and a flow control kno

Abstract: A pressure surface forming a boundary of a plenum has an orifice therein through which the flow is channeled. An elastomeric body having a surface with curvature different than that of the pressure surface is squeezed to varying degrees against the pressure surface causing the elastomeric body to contact the pressure surface over an area which increases with increasing squeeze. The orifice is positioned and sized to be wholly within the maximum contact area of the elastomeric body with the pressure surface and to extend outside of the minimum area. At intermediate degrees of squeezing the elastomeric body exposes a finely controlled opening for flow through the orifice.

Abstract: A control valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice is mounted for movement within the slide chamber to seal the flow passageway when the flow orifice is out of register therewith and to connect the inlet and outlet passages in flow communication when registered therewith. One of the inlet passage and the flow orifice has a cross section including a tapered slot portion which terminates in an apex defining an angle of from about 45 to 90 degrees and an associated polygonal base portion or circular arc base portion subtending from 225 to about 270 degrees of arc. The other has a peripheral shape which includes a leading edge disposed substantially perpendicular to the direction of travel of the plug member.

Abstract: A valve for metering a slurry includes a primary flow path for directing a continual flow of slurry through the valve, a valve stem which extends through the primary flow path and engages a passage in a valve seat for metering a portion of slurry passing through the primary flow path out through a second outlet in the valve. A portion of the valve stem which engages the valve seat passage is cut-away and when placed in communication with the primary flow path allows the flushing of accumulated solids through the valve seat passage to avoid persistent plugging of the valve.

Abstract: The drain valve (1) has a valve tube (26) as well as an insert (37) with a float (38) in a valve housing (36). The float (38) is connected with the valve tube (26). In the bottom (49) of the insert (37) openings (39, 41a) are provided, which can be made to index by rotating a punched disk (40). For setting or resetting the flush water quantity, the punched disk (40) can be rotated by raising and turning the valve tube (26). Cogs (43) of the punched disk (40) will then engage in corresponding cutouts (45) at the lower end of the valve tube (26).

Abstract: An apparatus is provided for dispensing a beverage made from a mixture of drink concentrate and water. The apparatus includes a valve assembly for controlling the rate of water and drink concentrate flow. A first conduit delivers water from a water source to the valve assembly. Additionally, the apparatus includes a second conduit for delivering drink concentrate from the drink concentrate source to the valve assembly. The valve assembly includes a flow control valve having a housing including a cavity, a fluid inlet and a fluid outlet. A cylindrical valve body is received in the cavity and includes a stepped arrangement of flow apertures radially arrayed about the valve body. Each flow aperture is spaced from an adjacent flow aperture by at least a 45.degree. arc. Additionally, each flow aperture has a diameter of between 1/20 and 1/40 of an inch. The valve assembly functions to provide a water to drink concentrate ratio of between 120:1-135:1.

Abstract: A pneumatic calibration system and the pump therefore, the system comprising a first fluid containing chamber for attachment to a device to be tested, a valve coupled to the first chamber to remove the fluid from the first chamber and a pump structure for providing a predetermined pressure to the fluid in the first chamber. The pump comprises a first piston disposed and moveable within first chamber to vary the volume of first chamber, a second piston, a second fluid containing chamber communicating between the first piston and the second piston, the second piston providing a predetermined pressure to the fluid in the second chamber and an expanding sleeve valve communicating between the first chamber and the second chamber to minimize the pressure differential across the first piston. The position of the first piston is adjustable in the first chamber. The second chamber includes a first portion and a second portion with a sleeve valve disposed therebetween.

Abstract: A flow measuring or flow metering device having a dynamically variable inner diameter. The flow device uses electrorheological fluid to support an inner flexible membrane. The quantity of electrorheological fluid is varied to change the inner diameter of the flexible membrane.

Abstract: Balanced piston fluid valve, wherein annular outer and core inner coaxial valve members are adapted to move to and fro slidably relative to one another and to bar upstream-to-downstream fluid flow when mutually juxtaposed into seated position but adapted to enable such flow when spaced apart in unseated position.

Abstract: A fluid flow regulating valve adapted to prevent the operation of the valve from violent pressure change, namely the hydraulic ram effect, in the fluid, particularly during closing and opening of the valve, the valve comprising a casing that houses a regulating plate slidably mounted within the casing. The plate has a regulating orifice having a variable fluid pass section which decreases from an end to another end of the orifice. The orifice is adapted to be aligned, through its different sections, with inlet and outlet ports provided in the casing, whereby the inlet and outlet ports communicate to each other through the orifice and the fluid flow can be regulated by those different sections of the orifice.

Abstract: A valve assembly includes a housing having at least one valve orifice for fluid flow therethrough, and a valve member which moves between a fully closed position and a fully open position, respectively, closing and opening said valve orifice. The valve orifice has a clearance surface forming an auxiliary valve passageway selectively enabling flow communication therethrough in an intermediate position of the valve member between said fully open and fully closed positions, and in the intermediate position the valve member partially obstructs the valve orifice so that the passageway provides attenuated fluid flow communication through the valve orifice relative to fluid flow communication in the fully open position of the valve member. A manually controlled actuator enables limited displacement of the valve member between the fully closed position and the intermediate position for the attenuated flow communication through the valve orifice.

Abstract: A device of toothbrush capable of automatic supplying with water, which comprises a hollow body being of suitable size and length, the body is provided with a water inlet at one end thereof; a water controller being provided near the middle position of the body to control the flowing of water toward a brush portion of the toothbrush at the front end thereof, when being controlled, clean water can be flushed upwardly from under said brush portion.

Abstract: A flow control valve is disclosed wherein a deformable elastomeric element is positioned at least partially within the flow path of a fluid passing between an inlet and an outlet. By deforming the elastomeric element, the cross-section of the flow path of the fluid is changed, thereby controlling the flow of fluid through the flow control valve. The elastomeric element may be of various standard configurations and is easy and inexpensive to replace in the event of excessive wear.

Abstract: An orifice assembly for use in sealed fluid connection between a gas inlet and gas outlet in a gas flow meter includes a rotor positioned for rotatable movement in fluid connection with both the gas inlet and gas outlet. The rotor includes a plurality of bores in a first circular plate and a matching number of gas passageways in a second circular plate, the passageways being aligned with the bores. The rotor also includes an annular groove separating the first and second circular plates and in fluid communication with the gas inlet for introducing gas into the gas passageways. A plug is adjustably positioned in each bore and axially movable toward the corresponding gas passageway to partially block gas flow from the inlet toward the outlet.

Abstract: A high pressure fluid flow control valve that can accurately regulate the volume of fluid flow through the valve in discrete steps by means of a ratchet mechanism associated with a rotatable shaft. The rotatable shaft has a sealing surface on one end for mating with a sealing surface on the output port to close the output port or open it as the shaft is rotated. The shaft is threadedly engaged with the body portion such that it can be rotated a limited portion during opening the valve so that it cannot be accidentally rotated out of the body portion and the valve disassembled. A bleed valve is associated with the hollow chamber to limit the maximum pressure in the valve chamber.

Abstract: A variable orifice gas modulating valve for use with an atmospheric Bunsen-type burner is disclosed. The variable orifice valve discharges a jet of fuel directly into the burner mixing tube and modulates the gas flow to the burner by changing the cross-sectional area of the gas jet. This is accomplished by a thin moveable sheet interposed between a valve body and a cap, through which pass the upstream and downstream portions of a short gas discharge passageway. The sheet has a hole which is positioned relative to the axis of the gas discharge passageway so as to produce a discharge orifice of variable size. The gas jet has the same velocity at all inputs, and flow rate variation is manifested by variation in the jet cross-sectional flow area.

Abstract: An apparatus and method for cleaning and flushing a conventional garbage disposal unit. A flow restricting valve replaces a conventional valve in the water seal trap in a kitchen drain line. The flow restricting valve is actuated by a pull-push plunger from outside the pipe. To clean the garbage disposal, the valve is closed and water back flows into the disposal unit for cleaning. When the valve is opened the garbage disposal unit can be flushed. Accordingly, the garbage disposal unit is easily cleaned and flushed, eliminating undesirable odors, without the need for a plumber's intervention.

Abstract: A control valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice is mounted for movement, within the slide chamber to seal the flow passageway when the flow orifice is out of registration therewith and to connect the inlet and outlet passages in flow communication when registered therewith. The flow orifice has a cross section including a tapered slot portion which terminates in an apex defining an angle of from about 45 to 90 degrees and a rectangular base portion or a circular arc base portion subtending from 225 to about 270 degrees of arc. This shape provides valves of enhanced rangeability with a unique logarithmic flow characteristic which, for most flow rates, is intermediate to linear and equal percentage flow characteristics.

Abstract: A spool valve has a valve body with an elongated cylindrical bore therein. Fluid passageways extend in a radial direction through the valve body and communicate with the interior bore. A peripheral port edge is defined by the intersection of the bore and the passages. A cylindrical valve spool is slidably mounted in the bore to close and open the passageways with respect to the bore. The valve spool has a cylindrical outer surface and at least one planar circular surface with a peripheral metering edge therebetween. The peripheral metering edge has a plurality of tapered notches therein which are adapted at times to overlap the peripheral port edge to permit fluid flow between the bore and the passages.

Abstract: An improved bulk cement metering apparatus includes a valve housing having a cylindrical inner housing bore. The housing has an inlet opening through a side wall thereof. A housing outlet is defined at an open lower end of the cylindrical valve housing. A cylindrical valve element is concentrically and rotatably received within the housing bore. The valve element is rotatable relative to the valve housing between a first fully closed position and a second fully open position. In the closed position the valve element completely blocks the inlet opening. In the open position the inlet opening is completely open. As the valve element rotates from its closed position to its open position a circumferentially extending cutout means thereof progressively uncovers an increasing upper portion of the inlet opening. This design results in decreased plugging of the metering device at low flow rates.

Abstract: A fluid flow control valve assembly which comprises a valve housing having defined therein a valve chamber defined therein a valve hole, inflow and outflow ports adapted to be communicated with each other through the valve chamber by way of the valve hole; and a valve rod inserted exteriorly of the housing and into the valve chamber and coupled with a handle for turning the valve rod about a longitudinal axis thereof thereby to move the valve rod in a direction coaxial with the longitudinal axis of the valve rod to adjust an opening of the valve hole. The valve rod includes a valve member formed on one end of the valve rod confronting the valve chamber and axially movably inserted in the valve hole, and a shank portion formed on a generally intermediate portion of the valve rod and slidably, but fluid-tightly sealing the valve chamber.

Abstract: The fuel injector has several swirl passages in a fuel swirl and needle guide member that direct swirl fuel onto the frusto-conical surface of a valve seat member that is disposed at the injector's nozzle end. The needle lift is such that with the needle unseated to open the injector to flow, the swirl fuel is throttled as it passes between the rounded tip end of the open needle and the frusto-conical surface of the seat member. The throttling tends to spread the swirl flow so that it is more uniform in the circumferential sense. If the injector is closed before equilibrium flow occurs, a toroidal shaped fuel cloud is created; if the injector is closed after equilibrium flow occurs, an ellipsoidal shaped fuel cloud is created.

Abstract: A gas control valve including a body having a throat formed in a bore, a post slidably received in the bore and including a plug, a pin laterally engaged on an upper portion of the post, and a spring for biasing the post so that the plug can be separated from the throat and so that gas may flow through the throat, and a guide fixed in top of the bore and having two inclined surfaces, the ends of the pin are slidable along the inclined surfaces, the plug can engage with the throat when the knob is pushed toward the body so that gas is prevented from flowing through the throat.

Abstract: An adjustable orifice comprising two half plates movable with respect to one another with adjusting holes for positioning the plates and flanges for holding the half plates in position.

Abstract: An apparatus for processing semiconductor wafers at reduced pressure comprising a vacuum chamber and a pumping system connected with the chamber. The pumping system includes at least a roughing pump, an exhaust pipe connecting the chamber with the roughing pump and a valve inserted in the exhaust pipe for opening and closing gas flow therethrough. The valve comprises: a valve casing having valve inlet and outlet openings connected with the exhaust pipe; a valve seat comprising a gasket surrounding at least one of the openings and having a first surface; and a valve plug having a second surface, the second surface being parallel with the first surface and contacting airtightly with the gasket at a valve closed position, the valve plug being movable substantially in the direction of the first surface for closing and opening the valve, thereby causing the opening for gas flow to be opened or closed gradually by the movement of the second surface of the valve plug.

Abstract: It comprises a metering valve (11) mounted inside a body (12) provided with an inlet (13) and an outlet (14). The inlet for material (13) is formed in a block (15) housed in a cavity of the body (12) and fixed to the latter by screws (16). The body (12) is provided with a cylindrical cavity (18) obturated by a lateral cover (19) fixed to the body (12) by screws (20). The cavity (18) contains a pusher composed of a first part (21) associated with driving means (22) and of a second part (23) associated with a return spring (24). The valve comprises a slide valve (33) comprising an upper surface (34), a plane lower surface (35) and a traversing conduit (36) formed between the upper surface (34) and the lower surface (35). This slide valve (33) is displaced in a sliding manner on a plate (37) provided with two traversing ducts (38) which communicate with the outlet (14) for the metered material.

Abstract: A novel planetary roller type flow control valve, which can precisely control a flow rate and has a small friction, is provided.

Abstract: A rotatable rigid material valve operator is provided having a threaded shank threadedly engaged within a threaded blind bore formed in a valve member constructed of thermo plastic elastomer having an 80-90 "SHORE" scale durometer hardness and snugly slidingly disposed within a valve body bore against rotation relative thereto, the threaded shank being rotatable relative to the valve body against axial displacement relative thereto such that rotation of the threaded shank translates into axial shifting of the valve member within the valve body bore.

Abstract: The disclosed valve may be configured for use as a pressure relief valve, pressure regulator valve or pressure reducing valve. A pair of opposed valve members defines a radial flow path therebetween which extends from the outer radial peripheries of each valve member to an axial bore formed in one of the valve members. The other valve member comprises a substantially pressure balanced piston, the axial movements of which control flow through the valve. A pilot valve for relieving pressure above the piston has its inlet positioned within a cavity formed on the upper surface of the piston.In a second disclosed valve, a pair of opposed valve members defines a radial flow path therebetween which extends from the outer radial peripheries of each valve member to an axial bore formed in one of the valve members. The other valve member is mounted on a stem having an upper end which is urged upwardly by a spring disposed around the stem.

Abstract: The present invention is directed toward an air and liquid product flow control element that can be adjusted to vary the flow of liquid dessert product and ambient air into the freezing chamber of a frozen confectionery dispensing machine. The invention is an air tube with a varied opening on its circumferential skin near one end, and a moveable sleeve that fits around the air tube. The air tube is positioned in the reservoir of liquid dessert product with its varied opening being submersed into the liquid. The air tube connects the freeze chamber with the ambient air above the liquid reservoir and allows liquid to flow through the varied opening into the freeze chamber.The moveable sleeve that fits around the air tube extends from the ambient air above the liquid reservoir, down to the varied opening. By moving the sleeve up and down along the air tube, the sleeve blocks part or all of the varied opening.

Abstract: A pair of plates of a hard material (a socalled ceramic material or the like), intended to form the members for flow control of a faucet of the socalled screw type, and having an extended control field, wherein at least one of the sides which define the passage opening of at least one of the plates of the pair has substantially the shape of an arc of linear spiral (Archimedes' spiral), and the end portion having the smaller width of the passage opening defined by this arc of linear spiral is located near the plate periphery. The stated shape like an arc of linear spiral may be chosen for one side of the passage opening of one plate only, or even for one side of the passage openings of both plates, but in this latter case it is needed that the two spirals have a different slope. By means of this pair of plates it is possible to obtain control angles extending in the field from 1/2 turn and 3/4 of a turn, for example angles of 230.degree. or 270.degree..

Abstract: A device for transforming a laminar fluid flow into drops, especially infusion fluids, comprises an inlet unit tightly placed into an intermediate unit. A cylinder of the inlet unit is, on its outer circumference, provided with a screw-shaped channel extending from a through-hole leading perpendicularly to the cylinder at its first side to the area of passage of the cylinder into a bottom at its second side. A step projecting radially inwards from the cylinder comprises, on its inner circumference, a number of longitudinally running grooves connected to a number of radially running grooves arranged on a flange of the intermediate unit. A levelling nut is screwed on a thread of a socket comprising a sealing screen which, with a transition fit, is placed between the cylinder of the inlet unit and the cylinder of the intermediate unit.

Abstract: A flow regulator for high-pressure fluids at elevated temperatures includes a body having a flow passage extending between inlet and outlet openings. First and second orifice members are arranged in the flow passage so at least one of the orifice members can be moved transversely in relation to the flow passage between one operating position where the two orifice openings are aligned for establishing a maximum flow rate of fluids flowing through the flow passage and at least one other operating position in which the two openings are moderately misaligned with one another for establishing a predetermined reduced flow rate of fluids flowing through the flow passage.

Abstract: A flow selector device whose fluid flow is regulated by the rotational setting of a rotor body in a housing; and although the metering passageways have outlets spaced from the axis of the rotor and its manipulating shank, other passageways are provided in the housing, which channel the fluid then to an outlet in and concentric with the rotor and its flow-rate adjustment shank. One of those other passageways is an annular groove formed into the rotor's manipulating shank, leading to a radial passageway in the shank, thus carrying fluid to the shank outlet channel regardless of the rotational setting of the rotor. Another of those other passageways is in the housing; and its provision is facilitated by forming it to open onto an outer face-portion of the housing, then sealing the outer portion of the passageways by a ball member forced into the outer end of the passageway. The rotor is held axially of the rotor by a snap ring, and by a nylon ring between the snap ring and the housing.

Abstract: A micro-leakage regulating valve, in which a metal block has a through hole and a tapped hole extending from one side of the metal block and communicating with the through hole at the center thereof. The through hole has inserted therethrough a capillary metal tube. At one end of the through hole a sealing member provides a seal between the outer peripheral surface of the capillary metal tube and a surrounding wall surface of the metal block. An adjusting screw is screwed into the tapped hole, to crush the capillary metal tube to a desired degree, setting a desired flow rate.