Abstract: A fluid flow control device for maintaining a substantially constant predetermined rate of flow through a control valve including a fluid flow passage for directing fluid flow through the valve, a resilient fluid flow rate control washer positioned in the fluid flow passage for maintaining a substantially constant predetermined rate of flow through an outlet of the fluid flow passage irrespective of a pressure of the fluid in the passage and fluid flow conditioning washers for conditioning the flow of fluid through the flow rate control washer with the fluid flow conditioning washers being movable with respect to the flow rate control washer for aiding in the conformability of the flow rate control washer. Preferably, at least two fluid flow conditioning washers are positioned upstream of the flow rate control washer and at least one fluid flow conditioning washer is positioned downstream of the flow rate control washer.

Abstract: A noise suppression assembly including a retainer having (1) a retainer body defining a central cavity therein, (2) a base flange extending outwardly from the retainer body, and (3) a fluid channel defined therein. The noise suppression assembly further includes a flow control member having a central passage through which the flow of water advances, the central passage of the flow control member being offset from the fluid channel of the retainer. Moreover, the noise suppression assembly also includes a suppresser having (1) a suppresser body, (2) a bullet secured to the suppresser body, and (3) a hole defined therein through which the flow of water advances, the hole of the suppresser being offset from the central passage of the flow control member, and further the bullet being aligned with the central passage of the flow control member. The base flange of the retainer has a peripheral edge with the fluid channel being spaced apart therefrom.

Abstract: An IV fluid flow control device includes a rigid casing defining a flow passage having a fluid entrance and a fluid exit. A rigid, previous base is affixed inside the flow passage of the casing. A flexible, resilient flow regulator is disposed inside the flow passage of the casing adjacent to and upstream of the base. The flow regulator normally has a smaller cross-section than does the flow passage, leaving open space for fluid to pass. A rigid, previous cap is disposed inside the flow passage of the casing adjacent to and upstream of the flow regulator. The cap is axially movable inside the flow passage of the casing. The flow regulator biases the cap against pressure from fluid entering through the fluid entrance. Increases beyond a threshold level in the pressure from fluid entering through the fluid entrance cause axial compression of the flow regulator, thereby expending the transverse cross-section of the flow regulator, resulting in a reduction of the open space for fluid to pass.

Abstract: A process to access a plate carrier having an orifice plate and carrier plate seal and an orifice fitting. The process includes moving the plate carrier from a pressurized orifice body lower chamber to an orifice body upper chamber. A seal ring is sealed in the upper chamber against the plate carrier to create a fluid type seal between the upper body chamber and the plate carrier. Pressure is bled off in the upper chamber to the atmospheric pressure. An entry plug threadably connected to a retainer is unscrewed and a crank removed to allow access to the orifice plate and to the carrier plate seal. The crank and entry plug are replaced and the upper chamber is repressurized. The seal ring may then be loosened from the plate carrier before returning the plate carrier to the lower body chamber.

Abstract: Disclosed is a means for automatically regulating water pressure in water pipe mainly including a tube connected to and between two sections of water pipes. A plurality of pressure-reduction members and springs are alternately disposed in the tube. The pressure-reduction members have an external diameter slightly smaller than an inner diameter of the tube. Grooves or through holes are formed on a circumferential surface or bottom surface, respectively, of the pressure-reduction members for water to pass through. Whereby, when a small volume of water with low water pressure flows into the tube, the springs are in an extended state, allowing water flowing into the tube to freely pass the grooves around the pressure-reduction members and to enter into the springs via circumferential clearances of the springs, and finally flows out of the tube via the through holes on the lowest pressure-reduction member in the tube.

Abstract: Piping systems adapted for handling fluids such as steam and various process and hydrocarbon gases through a pressure-reducing device at high pressure and velocity conditions can produce severe acoustic vibration and metal fatigue in the system. It has been determined that such vibrations and fatigue are minimized by relating the acoustic power level (PWL) generated in the piping system to being a function of the ratio of downstream pipe inside diameter D.sub.2 to its wall thickness t.sub.2. Additionally, such vibration and metal fatigue can be further minimized by relating the fluid pressure drop .DELTA.p and downstream Mach number M.sub.2 to being a function of the ratio of downstream piping inside diameter D.sub.2 to the pipe wall thickness t.sub.2, as expressed by M.sub.2 .DELTA.p=f (D.sub.2 /t.sub.2). Pressure-reducing piping systems designed according to these criteria exhibit minimal vibrations and metal fatigue failures and have long operating life.

Abstract: The object of the present invention is to provide a device to make flow uniform in a denitrification system, which can achieve a predetermined flow regulation effect with low pressure loss independently of the gas flow rate. According to the present invention, the device installed on the upstream side of a chemical injection means for the denitrification system is composed of at least one perforated plate 11, and the perforated plate 11 can be turned by a rotating shaft 10 or 10a from the closed position where the gas flow path is closed to the open position where the gas flow path is opened or vice versa.

Abstract: An apparatus and method for variably controlling fluid flow in a closed flow line, especially the flow of a pulp suspension through a headbox of a paper-making machine, includes guiding fluid through a cavity of a conduit having at least two different cross-sectional profiles. Fluid flow resistance is adjusted by changing the contour of an edge defined by the conduit and a transition step connecting the two cross-sections.

Abstract: Tubes (12), which can have any variety of cross-section and multiple bends, to be cleaned each have one end portion retained within a fixture (16) by an expanded bladder (42) while pressurized cleaning fluid (52) from conduit (50) passes through the tubes (12). Where no tube (12) is positioned within a particular fixture (16), the cleaning fluid (52) is prevented from moving through the fixture by the expanded bladder (42).

Abstract: A nebulizer is improved by placing a flexible valve in the ambient air inlet tube. Inhalation suction and Venturi effect shut down the flexible valve in proportion to the strength of the inhalation. Thus, the same output flow rate is obtained even with variable strength inhalations. Medications can be properly administered by controlled inhalation flow rates. In an alternate embodiment a metered dose inhaler (MDI) is outfitted with a similar flexible valve. Once again the patient is forced to inhale at a constant flow rate, thus causing the medication to seep deeply into the lungs. In both embodiments the flexible valve is preferably shaped in a duck billed fashion with air flow flowing toward the narrow end of the duck bill.

Abstract: A flow control valve assembly having an outer housing and a valve member mounted within the housing. The valve member defines a flow channel and is composed of a compressible material which remains substantially in a non-compressed condition at fluid supply pressures below a predetermined range. At higher pressures, the valve member is compressed to reduce the flow channel so as to automatically control the flow rate through the valve assembly.

Abstract: An apparatus for metering fluid flow through a pipeline in which a housing is provided for connecting to the pipeline and which defines a chamber through which fluid from said pipeline flows. A mounting surface is formed in the chamber and a carrier assembly is disposed in the chamber for defining an orifice and a second mounting surface which engages the first mounting surface to align the orifice with the pipeline.

Abstract: The Variable Orifice Valve is disclosed and the preferred embodiment of a hydraulically acruated.sub.-- flow control device that permits the calibrated throttling of water used in a Artificial Storage and Recovery (ASR), Dedicated Recharge, Injection, Salt Water Barrier Wells used in aquifer storage.sub.-- or utilized in other industries where fluid flow control is required and desired. Aquifer storage of treated drinking water is the placement of water in aquifers during periods of surplus water for recovery of the water during peak demands or forming a barrier to protect a fresh water aquifer. This invention, when installed in a recharge well, is a device installed below the static water level and at or near the bottom of the drop pipe and near the top of the well screen. The size of the orifice and the liquid flow is varied by the axial positioning or adjustment of a double acting hydraulic actuator connected to valve piston.

Abstract: An improved mechanical system selectively locks the tester valve of an annulus pressure responsive tester valve in position for an indeterminate number of well annulus pressure cycles. The tester valve also features a multi-range metering cartridge which is operable to meter fluid over a wide range of differential pressures. The metering cartridge provides an adjustable resistance flow path which permits fluid flow across the cartridge. The resistance of the flow path is adjustable by selectively diverting the fluid through a series of fluid flow resistors. Resistance may be increased either by adding a number of flow resistors serially or by adding a single flow resistor which itself provides a greater fluid flow resistance.

Abstract: A restrictor for limiting the volume of fluid flowing from an automotive hose into a heat exchanging device in an automotive heating or air-conditioning system is disclosed. The restrictor includes a generally cylindrical, hollow body disposed in the hose and a flow limiting washer disposed in the body. The body includes an annular wall having a stepped region of reduced cross-sectional area which receives a hose clamp therein to prevent sliding and rotation of the restrictor within the hose.

Abstract: An orifice fitting for measurement of fluid flow therethrough. The orifice fitting includes a plate carrier having an orifice plate and carrier plate seals. The plate carrier may be moved between an upper chamber and a lower chamber. The upper chamber includes a pair of opposed seal rings, each of which is independently tightenable against the plate carrier. At least one removable entry plug in the upper chamber allows access to the plate carrier, the plate and the seals without the necessity of interrupting or disabling fluid flow through said lower chamber.

Abstract: A fluid flow control apparatus 10 which uses a plurality of deformable metal springing arms 98, 108 to position a plurality of metal plates 40, 50, 70 within a chamber 34. The metal plates 40, 50, 70 define a plurality of flow paths to vary the amount of flow through the flow control apparatus 10. By changing the size and quantity of the various flow paths F.sub.1, F.sub.2, F.sub.3 and F.sub.4 the flow control apparatus can be tailored to each specific application. The fluid flow control apparatus thus has the durability advantages associated with metal flow controls by using metal spring arms instead of coil springs, and provides the smaller packaging advantages associated with molded rubber flow controls. The apparatus utilizes the deflection of the metal springs instead of the deformation of rubber which will change. The diameter of the apparatus can be as small as 3/8 inch larger than the inlet diameter, and have a length of as little as 3/8 inch.

Abstract: A throttle device for stock suspensions in a paper machine including a feed line, a drain line and a spatially variable cavity connecting the feed line and drain line with each other. The cavities provided with a plurality of nestable walls in which the nesting effects a lengthening of the flow path.

Abstract: A custom profiled flexible conduit system conveys a fluid therethrough between two locations, which may be moving relative to one another. The conduit profile includes a wall with a nonuniform thickness selected to control a diffusion rate of the fluid when conveyed through, or when standing within the conduit. The conduit profile defines a main chamber and optional auxiliary chambers. During a collapse of the conduit, caused by a kink for instance, restricted fluid flow may be sustained through a constricted passageway formed in the main chamber, through the auxiliary chambers, or both. The profile may include a protuberance into the main chamber to maintain flow during collapse. The profile may also be customized to minimize the bend radius before collapse of the conduit, and to promote bending in a particular direction. A method is also provided of conveying fluid between two locations.

Abstract: The invention relates to a device (2) designed and adapted to bring an in per se known mixing body (11) to correspond to a fluid flow area which e.g. is defined by a pipeline (1,3) wherein a two-phase fluid may flow, said fluid being desired to be mixed in connection with sampling (4), and to withdraw the mixing body (11) easily and rapidly in order to release said fluid flow area. For this purpose, the device according to the invention comprises a valve housing (6) formed for fluid-tight connection to said pipeline in an area of two diametrally opposite openings (1', 1") of the pipeline, enclosing said openings. Within the valve housing (6), a sluice body (5) carrying said mixing body (11) has been displaceably arranged. The sluice body (5) and thus the mixing body (11) is displaceable between two main positions. In one main position, the mixing body (11) has been brought to correspond with said fluid flow area.

Abstract: The invention relates to a method in connection with a roof drainage apparatus and a roof drainage apparatus. The invention comprises a trough (2) recessed in a roof structure (1), an opening (3) arranged in the bottom of the trough, a water-outlet tube (4) joined to the opening and a means (5) for changing an open water flow into a closed flow when the water flow is increasing. For intensifying the drainage, an element (6) is positioned in the water-outlet tube (4) at a throat after the opening (3), by means of which element the cross-sectional area of the water-outlet tube (4) is regulated in such a manner that the shape of the cross-section of the water-outlet tube (4) remains substantially unchanged at the regulation.

Abstract: A method for providing resistance to flow through a flow passageway comprises partially blocking flow through an orifice of reduced diameter by masking the orifice with an element formed of porous material retained immediately adjacent to every side of the orifice that is expected to be exposed to higher pressure fluid with a greater surface area of the porous masking element being exposed to fluid in the passageway on the higher pressure side of the orifice than is exposed by the orifice to the lower pressure fluid. The orifice may be formed by direct configuration of the passageway walls or by a body adapted to retain the masking element in the body, the outside of the body being adapted to for secure installation within the flow passageway. Resistors in accordance with the present method may have masking elements on one side for use with one directional pressure differentials or masking elements on both sides for use in applications in which bidirectional pressure differentials are anticipated.

Abstract: A fluid resistor for providing resistance to flow through a flow passageway is formed by cutting channels and open cylindrical recesses on the surface of and flow passage bores through a frusta-conical body to be seated in a tapered passageway section with the larger diameter end generally subject to higher system pressures than the smaller diameter end. The seating of the resistor body in a tapered passageway section seals and encloses the channels and recesses which then with the fluid passageways through the resistor body, comprise a restricted path for flow to proceed past the installed resistor, the recesses forming cylindrical chambers.

Abstract: The Variable Orifice Valve is disclosed and the preferred embodiment of a hydraulically actuated device that permits the calibrated throttling of water used in an Aquifer Storage and Recovery (ASR). ASR is the storage of treated drinking water in an aquifer during periods of surplus water for recovery during peak demands. This device is installed below the static water level and at or near the bottom of the column pipe in the recharge well. The size of the orifice and the flow of water is varied by the axial adjustment of a hydraulic piston. The axial position of the piston is controlled by a hydraulic actuator competed through steel tubing to a hydraulic pump at the well head. The flow is monitored by using a flow meter and pressure gage in the hydraulic fluid passageway. The desired flow is set by adjusting the Variable Orifice Valve hydraulically while monitoring the flow. The operator may adjust the flow of water to any increment within the range of the valve.

Abstract: A solenoid controlled, pilot actuated inlet water valve apparatus has an inlet connected to a residential water source pipe and an outlet connected to an appliance such as a dishwasher or clothes washing machine. The inlet water valve contains a flow control, a noise suppressor, a pilot valve controlled by an electrically operated armature, and a main valve composed of a diaphragm, diaphragm insert, valving surface and bleed passage. The noise suppressor is located downstream of the flow control and reduces water velocity by first radially dispersing incoming water to the periphery of the noise suppressor in a dispersion chamber. Next, water passes through passage holes located around the periphery of the noise suppressor into a recombining chamber with it is directed toward a central exit port. When water moves in the recombining chamber toward the central exit port, the water converges from different directions further reducing water velocity and noise caused by cavitation.

Abstract: A passage choke in particular for the outlet of a plumbing fixture which is installed between the end (9) of the outlet (5) and an aerator (6) or a flow controller, which is provided with a through-flow opening (8) which advantageously has to enlarge it a knockout (12).

Abstract: A device for remotely actuating a piece of equipment by varying the flow conditions of a fluid, possibly incompressible, an comprising an actuating piston, a nozzle-needle assembly. One of the nozzle or the needle is mounted for sliding movement into the piston. An arrangement is provided for returning the slidably mounted nozzle or needle to a predetermined position relatively to the piston.

Abstract: Wind tunnel having a free jet test section for simulating wind direction fluctuations, principally for the investigation of vehicles, equipped with a nozzle which can be rotated when the wind tunnel is operating, in order to alter the wind flow direction, in which arrangement the nozzle comprises a stationary part and a rotatable front part and the nozzle front part is surrounded by a cylinder surface which is sealed off in the manner of a plug in the end wall of the nozzle prechamber in relation to the test chamber; within the nozzle prechamber, which surrounds the nozzle, a compensating flow can take place upon rotation of the nozzle front part, so that the quality of the jet flow of the wind tunnel is, if at all, only barely noticeably impaired by the rotational movement. In order to investigate flow-acoustic problems with a varying wind direction, the wind tunnel can be equipped with sound deadening and sound attenuating devices as well as an absorbing lining.

Abstract: Apparatus for installation in an associated coal pipe for directing pulverized coal to an associated furnace assembly that includes a housing having an inlet, an outlet, and an access port intermediate the inlet and the outlet. The apparatus also includes a generally circular orifice, a tray dimensioned and configured for carrying and engaging the orifice and apparatus. The chamber is generally aligned with the access port and is dimensioned and configured for receiving the tray with the orifice carried thereon. The apparatus in the housing defining a chamber allows sliding movement of the tray with the orifice carried thereon into and out of the chamber through the access port.

Abstract: An improved high volume, straight through, low turbulent flow pressure regulating valve is provided by utilizing a hallow cylindrical valve which is selectively and telescopically disposed over an aligned conforming biscuit around which biscuit and through which valve the fluid flows. The valve does not contact the biscuit so that valve chatter is impossible. Furthermore, the absence of a valve seat or other lip reduces the turbulence introduced into fluid flow within the valve body thereby also increasing flow volume capacity. Movement of the valve is controlled in response to pressure within the valve body by means of rolling diaphragm, which is fluidically communicated to the interior of the valve body. The diaphragm, which acts as a piston, is connected between the valve body and the valve member. Increased pressure within the valve acts against the diaphragm forcing the valve member over the biscuit to reduce flow and pressure. The diaphragm, acting as a piston, acts against a prebiased spring.

Abstract: The water remediation and purification apparatus includes a cavitation nozzle which is operated with a throat size and pressure drop to incur cavitation in the water. The explosive and implosive bubble growth and collapse produces free radicals which interact with contaminants in the water to oxidize the contaminants. The cavitation process is enhanced by (1) a variable throat nozzle, (2) recycling the product back through the nozzle for further oxidation, and (3) programmable control feedback. Subsequent ultraviolet radiation from high energy lamps, ion exchange and/or degassifying treatment can be employed to produce water quality within acceptable levels.

Abstract: The present invention pertains to an apparatus for restricting supercritical fluid. The apparatus comprises an elastic tube through which the supercritical fluid flows. The apparatus also comprises means for adjustably compressing the elastic tube. The comprising means is in contact with the tube. Preferably, there is also means for facilitating flow through the tube. The facilitating means is in communication with the tube in proximity to the compressing means. In a preferred embodiment, the adjustable compressing means includes a first member having a first opening through which the tube extends. The first opening has a threaded portion. There is also a second member having a second opening through which the tube extends. The second member has a threaded shaft for threadingly engaging with the threaded portion of the first opening.

Abstract: A gauge block assembly for use in conjunction with the refilling of high pressure gaseous oxygen cylinders. The gauge block is used in an oxygen transfill header or manifold and includes a gas transfer control unit that allows rapid evacuation of the spent oxygen cylinder but that prevents rapid refilling of the oxygen cylinder with fresh oxygen. The gas transfer control unit includes a valve assembly having a restricted orifice therethrough. During the evacuation process, the check valve opens, bypassing the restricted orifice, to allow rapid evacuation of the oxygen cylinder at a first rate of flow. During the refilling process, the check valve closes. The incoming oxygen must flow through the restricted orifice at a second rate of flow less than the first rate of flow thereby regulating the flow of oxygen.

Abstract: A detergent dispenser that is utilized with solid cast detergent. A single valve is utilized to initiate a flow of a ready to use detergent solution that may be drawn off in container. The valve commences a flow of water that is split in a T-shaped fitting. An appropriate portion is routed to spray on the solid cast detergent and to dissolve the detergent into a concentrated solution. The concentrated solution flows into a conduit where it is mixed with the second portion of the water, diluting the solution to an appropriate concentration for use. A restricter located in the T-shaped fitting acts to split the flow of water appropriately to ensure that the discharge solution is in a ready to use concentration.

Abstract: A flow control device including an elongate body with a central longitudinal flow passage with upstream and downstream ends; an elastic orifice plate with a central orifice extending transverse the flow passage; and, a diffuser part projecting into the flow passage downstream from the plate and upon which a jet of fluid issuing and flowing downstream from the orifice in the plate impinges and is diffused; the diffuser part is placed downstream from the plate a distance so that it serves to diffuse the jet of liquid before its movement downstream in the flow passage generates a minus downstream of the plate.

Abstract: An adjustable orifice fitting carrier assembly for an orifice fitting having a receptacle and being interposed in a pipeline. The carrier assembly includes a carrier body receivable in the receptacle of the fitting to hold a flat, circular orifice disc having a center orifice therethrough, the orifice disc being perpendicular to the flow through the pipeline. A carrier holding plate is receivable in the receptacle and is in communication with the carrier body. An adjustment mechanism is provided to move the carrier body and the orifice disc in a first direction across the diameter of the pipeline while within the orifice fitting. An adjustment mechanism is also provided to move the carrier body and the orifice disc in a second direction across the diameter of the pipeline, perpendicular to the first direction, in order to concentrically align the center orifice with the axis of the pipeline.

Abstract: The water remediation and purification apparatus includes a cavitation nozzle which is operated with a throat size and pressure drop to incur cavitation in the water. The explosive and implosive bubble growth and collapse produces free radicals which interact with contaminants in the water to oxidize the contaminants. The cavitation process is enhanced by (1) a variable throat nozzle, (2) recycling the product back through the nozzle for further oxidation, and (3) programmable control feedback. Subsequent ultraviolet radiation from high energy lamps, ion exchange and/or degassifying treatment can be employed to produce water quality within acceptable levels.

Abstract: A constant-speed exhaust valve device has a valve body of a cylindrical shape opened at both axial ends, and a push means disposed to apply an axial compressive force to the valve body, whereby the exhaust speed of the device can be made steady and manufacturing yield of the device is made excellent.

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: An orifice fitting with an orifice plate centered in the flow passage of an orifice fitting via direct contact between a cradle and the orifice plate. The orifice plate is centered via the use of an orifice plate carrier having two channels on its downstream side and two slots located in the bottom portion of the seat, which is located on the plate carrier's upstream side. The plate fits into the seat and a bottom portion of the plate's peripheral edge protrudes through the slots. A cradle having locating surfaces fits through the channels in the orifice plate carrier and firmly holds the orifice plate against the orifice plate carrier. The cradle can be positioned and then secured in place by two adjustable set screws and a stem piece of the cradle. Once the orifice plate has been centered via the positioning of the cradle, the stem piece of the cradle and the set screws can be welded into the body of the orifice fitting.

Abstract: A drip irrigation emitter includes an elastomeric membrane formed on one side with a recess having a flat bottom to define a thin wall section of substantially smaller thickness than the remainder of the elastomeric membrane, and with a flow-restrictor orifice centrally through the thin wall section and of much smaller cross-sectional area than that of the recess to produce a pressure drop in the fluid flowing therethrough to the emitter outlet opening. The membrane is deformable to enlarge or restrict the flow to the outlet opening in response to changes in the inlet pressure to thereby regulate the flow through the outlet opening.

Abstract: An air injection device including a housing defining an air duct therein and a valve associated with the air duct for controlling the flow of air therethrough from a pressure source (55). The valve has a sheet (59) of flexible material positioned within the air duct, the sheet (59) being mounted on a face (60) of the air duct with the ends of the sheet (59) restricted from moving in a direction substantially orthogonal to the face (60) but free to move in a direction parallel to the face (60). The sheet (59) is operably connected to control, such as a solenoid valve (62), for controlling the contour of the sheet (59), within an air flow passing through the air duct. In one embodiment a second sheet is positioned on the inside top face of the duct opposite the first sheet (59). The air injection device is particularly useful for application with a sheet separator-feeder.

Abstract: A homogenizer comprises a homogenizing valve mounted to a pump block. The pump has multiple plungers housed in a set of pump chambers formed through a surface of the pump block. Sets of suction valves and discharge valves are positioned in valve bores formed through the block intersecting the pump chambers. During homogenization, each plunger reciprocates in a pump chamber to draw fluid through a suction valve and the pump chamber and discharge that fluid through a discharge valve and subsequently to the homogenizing valve. The homogenizer has a plurality of seals located along its fluid flow path and positioned to have a surface exposed directly to the fluid. As such, the homogenizer is characterized by the absence of recessed seals along the fluid flow path and provides an internal geometry in which microorganism growth and fluid residue buildup are minimized.

Abstract: A shaft-mounted piston is reciprocally disposed on the axis of a valve inlet opening such that increased pressure from within the motor casing of a centrifugal compressor causes the piston to move in the direction of the refrigerant flow, against a biasing means, to increase the flow of refrigerant through the opening, and to thereby regulate the pressure drop across said valve to a predetermined level. The shaft has an extended portion projecting through the piston toward the motor casing such that when the compressor is shut down and the pressure is thus greater in the valve than in the motor casing, the piston can move out of the inlet opening to the extended portion of the shaft to thereby allow the unrestricted flow of refrigerant into the motor casing.

Abstract: An assembly for regulating the flow of liquid includes a housing made of a first, second and third housing part. The housing parts being placed immediately following one another in the flow direction. The second of three housing parts constitutes a component of a discharge shutoff valve and a component of a flow regulating valve into which a flow-through conduit is integrated between the discharge shutoff valve and the flow regulating valve immediately following it in the flow direction. The assembly includes no freely moving parts and is distinguished by a compact construction.

Abstract: A variable-geometry duct having at least one moveable side wall, and a bellows interposed between the side wall and a back-up structure. The bellows creates a sealed cavity between the moveable side wall of the duct and the back-up structure. Pressurized fluid in the cavity is controlled so as to maintain a desired pressure differential between it and the pressure of the fluid carried by the conduit for all positions of the moveable side wall.

Abstract: A solid state apparatus for regulating the flow of fluids in general, and natural gas, in particular, is provided. The solid state apparatus includes an actuator made of electrostrictive, magnetostrictive or piezoelectric material. The actuator displaces upon application of an electric field to vary the compression on an elastomer having an orifice, thereby varying the amount of elastomeric material extruded into the orifice. Fluid flow through the regulator is thereby controlled. A system for regulating the flow of gas integrates the regulator with a sensor to detect a gas characteristic, such as gas partial pressure, and send control signals to control the operation of the regulator. The solid-state gas regulator is capable of low cost production and operation and suitable for electronic feedback control.

Abstract: A flow control device for feeding water flow at a constant flow volume regardless of the pressure. The device comprises a conduit body with a coupling end for coupling with a water supply pipe to receive water therefrom and a discharge end for discharging the water therethrough. The conduit body is formed in the coupling end with a concavity having a bottom wall recessed from the coupling end face and a peripheral inner wall. A passage extends through the conduit body to have its one end opened into the bottom wall and the other end leading to a discharge end. Received within the concavity is an elastic valve having a constricted aperture in fluid communication between the water supply pipe and the passage for feeding the water into the passage through the aperture from the water supply pipe.

Abstract: A flow control device for controlling the rate of flow liquid wherein a liquid supply tube is inserted in a liquid supply tube insertion channel extending in the longitudinal direction of the liquid supply tube. A roller is provided for squeezing the liquid supply tube against the bottom of the tube insertion channel. Ridges are provided for squeezing the opposite side edges of the liquid supply tube to a greater degree than the central portion of the liquid supply tube. The bottom of the insertion channel has a first inclined surface inclined with respect to roller bearing grooves for fine adjustment of the rate of liquid flow, and a second inclined surface terminating in the first inclined surface and inclined in the same direction as the first inclined surface but by a greater angle than the first inclined surface for a coarser adjustment of liquid flow through the liquid supply tube.

Abstract: A gauge block assembly for use in conjunction with the refilling of high pressure gaseous oxygen cylinders. The gauge block is used in an oxygen transfill header or manifold and includes a gas transfer control unit that allows rapid evacuation of the spent oxygen cylinder but that prevents rapid refilling of the oxygen cylinder with fresh oxygen. The gas transfer control unit includes a valve assembly having a restricted orifice therethrough. During the evacuation process, the check valve opens, bypassing the restricted orifice, to allow rapid evacuation of the oxygen cylinder at a first rate of flow. During the refilling process, the check valve closes. The incoming oxygen must flow through the restricted orifice at a second rate of flow less than the first rate of flow thereby regulating the flow of oxygen.