Abstract: A fluid stream pulse damper having a fluid conduit defining a fluid path and a fluid flow direction. The conduit has an inlet end and an outlet end. A damper body in the conduit intersects the fluid path. An energy absorber attached to the damper body operates in resistance to fluid flowing in the conduit.

Abstract: When a fluid passes through a conventional elbow, turbulence is created in the fluid flow. The fluid may not stabilize and return to a laminar flow until 40-50 pipe diameters downstream. Turbulence in a piping system can cause a variety of problems such as measurement error, noise, vibration, and/or erosion. The flow diffuser of the present invention may be configured as a 90° elbow for use in a piping system to reduce turbulence and/or pulsation as the fluid passes through the improved elbow. The elbow can restore substantially laminar flow in a space of about four pipe diameters, with nominal pressure drop.

Abstract: A compressor includes a discharge chamber into which pressurized refrigerant gas is intermittently discharged. The pressurized refrigerant gas in the discharge chamber is sent to an external refrigerant circuit. A chamber for accommodating a resonance suppressing adapter is located between a discharge muffler and the external refrigerant circuit. The adapter includes a float valve and a spring. The float valve can move between a position connecting the accommodation chamber to the muffler and a position disconnecting the accommodation chamber from the muffler. The spring urges the float valve to its closed position. The force of the spring is determined such that the discharge pulse frequency of the refrigerant gas does not coincide with the natural resonance frequency of the external refrigerant circuit or at least such that the amplitude of pressure variations of the refrigerant gas is reduced.

Abstract: A homogenization valve includes a housing and stacked valve members within the housing. The valve members have central holes therethrough defining a high pressure volume. Each valve member includes a valve seat defining, with a valve surface, gaps through which fluid is expressed radially from an inside high pressure volume to the outer low pressure volume. An actuator closes one end of the central volume and acts on the valve members to control the width of the gaps. A pressure barrier is positioned within the central volume to reduce the force from the central volume acting on the actuator.

Abstract: A common rail system having a regulated prefeed pump, which pumps a fuel flow from a fuel tank to a high-pressure pump. The fuel flow is split with the aid of a valve assembly into a lubricant flow and a high-pressure feed flow that is pumped into a high-pressure reservoir, and acted upon by high pressure. The prefeed pump has a substantially linear characteristic feed curve with a certain slope. To improve the regulating performance, the valve assembly for the lubricant flow includes a valve whose characteristic feed curve initially rises in a first portion (I) with the rpm of the prefeed pump with the same slope as the characteristic feed curve of the prefeed pump. Then in a second portion (II) rises substantially linearly, with a lesser slope than the characteristic feed curve of the prefeed pump, and in a third portion (III) finally drops again.

Abstract: When a fluid passes through a conventional elbow or valve in a piping system, turbulence is created in the fluid flow. The fluid may not stabilize and return to a laminar flow until 40-50 pipe diameters downstream. Turbulence in a piping system can cause a variety of problems such as noise, vibration, and/or erosion. Turbulence also creates a pressure drop which is undesirable. The flow diffuser of the present invention may be configured as a 90° elbow for use in a piping system to reduce turbulence and pressure drops as the fluid passes through the improved elbow. The elbow of the present invention included an elongate tapered discharge nozzle. The elbow can restore substantially laminar flow in a space of about four pipe diameters.

Abstract: An ultra-lean dilution apparatus is provided for proportioning minute quantities of a first fluid, such as a concentrated cleaning solution, for mixing into a second fluid, such as tap water, which provides improved performance and which can be manufactured by assembling several molded components with little or no machining. The dilution apparatus (20) provides a selective pressure drop in a conduit (22) by including a plurality of dilution disks (50a-50f), each dilution disk (50a-50f) having a tortuous path (52a-52f) of sufficient cross-sectional area to be resistant to clogging and having a sufficient number of sharp turns to create a desired pressure drop. While each disk (50a-50f) produces a predetermined drop, the serial configuration of the tortuous paths of the plurality of dilution disks is additive to produce a range of dilution suitable for the chemicals used.

Abstract: A homogenization valve includes a housing and stacked valve members within the housing. The valve members have central holes therethrough defining a low pressure volume. Each valve member includes a valve seat defining with a valve surface, gaps through which fluid is expressed radially from an outside high pressure volume to the central low pressure volume. The actuator acts on the valve members to control the width of the gaps. A counterbalancing mechanism reduces the amount of actuator force required to maintain a predetermined homogenization pressure.

Abstract: In a drainage system for a conduit having a conduit inflow and a conduit outflow, the intention is that at least one drainage obstacle which can be moved in the direction of flow (X) is provided for limiting, directing, regulating or influencing a stream of water.

Abstract: A device for limiting the flow rate of a liquid generally includes a tubular and rotation-symmetrical housing with an inlet opening and an outlet opening for the liquid. A substantially rotation-symmetrical first body is guided for axial displacement and urged toward the inlet opening by a spring. The first body includes a widest peripheral part located at a distance from an inner wall of the housing. An annular second body is disposed in a stationary position on the inner wall of the housing. As liquid flow increases through the device, the first body moves toward the second body while reducing a passage size of a gap defined between the first body and the second body.

Abstract: A cap assembly for providing continuous drip to a faucet exposed to freezing temperatures such as a faucet located outside a house. The cap assembly includes a cap member adapted to be mounted over the end of a faucet, which cap member includes a cylindrical wall portion and a closed end portion having an opening therein. The cap assembly includes an internal annular ridge which is adapted to receive a flow disc within the ridge, which flow disc includes an opening which is non-aligned with the opening in the closed end portion of the cap in order to create a dripping action. A rubber washer is positioned in sealing engagement with the internal annular ridge and the flow disc. A filter member is located within the rubber washer such that, upon mounting of the cap assembly over the end portion of a faucet, a continuous dripping flow through the cap assembly may be provided in order to prevent water within the faucet or within piping leading to the faucet from freezing.

Abstract: A laminar flow element for use in thermal mass flow sensors and flow controllers is designed to provide a high degree of precision. The precision laminar flow element includes a laminar flow element having a generally pointed entry end for maintaining a pure laminar flow path around the laminar flow element. The generally pointed entry end serves to direct an incoming gas flow stream equally about an outer surface of the laminar flow element. In this way, the laminar flow path is uniform so as to maintain a desired flow accuracy. The laminar flow element provides a plurality of standoff pins protruding from the outer surface of the laminar flow element to maintain a substantially equal radial clearance around the outer surface. By maintaining a substantially equal radial clearance from one laminar flow element to another, the laminar flow element is highly interchangeable.

Abstract: An I-type counterflow absorber for directly connecting with a piping system to absorb the impact force and noise resulting from water hammering in the piping system. It includes an outer tube, an inner tube, a valve seat, a valve and an annular piston board. The outer tube includes a front tube and a rear tube. The valve seat is located between the front tube and the rear tube and has a funnel groove and a passage formed therein. The inner tube is located in the rear tube and has one end engaging with one side of the funnel groove. The valve includes a valve engageable with another side of the funnel groove. The piston board is located between the inner tube and the rear tube for separating the space between the inner tube and outer tube in a buffer zone and an air chamber filled with air.

Abstract: A rotary noise attenuating valve is provided which utilizes noise attenuation technology previously utilized with linear valves. The arrangement includes an impedance assembly in which the area with the impedance assembly which is accessed by the flow downstream of a rotary closure element flow is varied upon opening of the rotary closure element, with an interface assembly disposed between the rotary closure element and the impedance assembly. As a result, benefits previously realized only in linear valves are attainable utilizing a rotary valve, while the benefits attendant to rotary valves (such as greater capacity, variable .DELTA.p and/or minimum .DELTA.p under max flow) are also attainable. Attenuator assemblies are also provided in which the attenuator or impedance structure is mounted within the valve, either downstream of the closure member, or mounted to the closure member.

Abstract: A throttle element for installation in a fuel carrying conduit, which is embodied as a screwed in insert with a head that constitutes an annular gap in relation to a cylindrical circumference wall of the conduit and this annular gap is disposed as a filter upstream of the throttle of the throttle element.

Abstract: The invention is a water flow limiting device that is placed into a housing. The flow device has a baffle plate which has one or more inlet passages and an outlet passage that has a predetermined diameter. The device also has a cylinder plate with one or more drain passages. The cylinder plate is connected to the baffle plate to form a distribution chamber. The distribution chamber receives the water from the outlet passage and empties it through the drain passages. The flow device also has a baffle device that is attached to the cylinder plate and accurately regulates the amount of water flowing from the distribution chamber into the drain passages. The baffle device may be a needle point screw, a rounded screw, a flat screw, or a combination screw and moveable orifice plate.

Abstract: An homogenization valve design yields improved homogenization efficiency. The length of the valve surface relative to the valve seat or land is controlled so that the overlap is limited. This allows convergence between turbulent mixing layers and a homogenization zone. Preferably some overlap is provided, however, to contribute to the stability of the valves and avoid destructive chattering.

Abstract: A variable flow restricting device comprises a part (12) having a groove (14) provided in a face (18) thereof and a through-passage (20) communicating with the groove. The device further comprises a covering structure (22) for engaging the face (18) to cover the groove (14) and thereby define a flow path which extends from the through-passage (20) in communication therewith. Covering of the groove is facilitated by a structure (26) for providing relative displacement between the part (12) and the covering structure (22) for causing resilient deformation of the covering structure and/or the part (12) to provide adjustably variable covering of the groove. The flow path extends from the through-passage (20) to an extent which is adjustably variable according to relative displacement of the part (12) and the covering structure.

Abstract: A suction for the combustion air of a heater, in particular a motor vehicle heater, has a variable cross-section of flow. The object of the invention is to improve the operation of the device that modifies the cross-section of flow and to allow it to be more rationally produced. In addition, it should allow the suction air to be filtered in association with said means without extending the axial length of the heater. For that purpose, the suction pipe is designed as an axially closed tube with radial openings whose cross-sections may be changed by a coaxial, rotary ring set on the outside of the pipe and provided with radial openings. A hood may be axially drawn over the ring on the housing of the heater. Suction air may be filtered in said hood, either by centrifugaton in spiral channels arranged in the hood or by using a ring-shaped filter through which the suction air flows in the radial direction.

Abstract: A fluid flow metering device is provided which includes a body and a plurality of flow restriction plates. The body has a duct, within which the flow restriction plates are disposed in a spaced apart manner. Each flow restriction plate includes an orifice disposed adjacent the interior wall surface of the duct and misaligned with orifices in adjacent plates. A side-to-side flow pattern is created by the position of orifices relative to the interior wall surface and the misalignment between orifices in adjacent plates which inhibits the accumulation of foreign debris within the duct.

Abstract: An improved control valve to control very low rates of flow having a valve body housing a throttle mechanism. The throttle mechanism comprising a bore and throttle plunger, having a helical exterior groove, sized with an annular passage therebetween. The size of the cylindrical passage is selected and held within limits so that media of a chosen viscosity maintains fully developed laminar conditions as it enters and exits the valve, by keeping the Reynolds Number under 4000. The flow rate is controlled by varying the distance that the throttle plunger extends into the bore. Because the valve operates under constant laminar conditions this varying distance yields linear results between the length of engagement of the throttle plunger in the bore and the flow rate resulting in an increased accuracy control valve.

Abstract: An homogenization valve design yields improved homogenization efficiency. The length of the valve surface relative to the valve seat or land is controlled so that the overlap is limited. This allows convergence between turbulent mixing layers and a homogenization zone. Preferably some overlap is provided, however, to contribute to the stability of the valves and avoid destructive chattering.

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 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 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 wide range laminar flow element for use in differential pressure and thermal mass flowmeters is disclosed. The flow element comprises multiple rectangular channels in a single rectangular plate. The flow element contains tabs which can be selectively removed to alter the effective diameter of the flow channel. Alternatively, the laminar flow elements can be stacked to provide a larger effective diameter of the flow channel.

Abstract: A variable restrictor valve for use in an intermittent dispensing system having a recirculation loop. The restrictor valve establishes a more linear relationship between the amount of adjustment made thereto and the resulting pressure drop over the restrictor valve in the recirculation loop. A first embodiment of the restrictor valve changes the length of the flow path created by a helical groove to thereby adjust the flow resistance through the valve. A second embodiment uses a valve member in the form of a perforated cylindrical tube which is adjustable to present a varying number of perforations as the inlet to the tube and thereby allow adjustment of the flow resistance. A third embodiment utilizes a helical spring as a valve member in which adjustable spacing between the coils of the spring provides adjustability of the flow rate through the spring.

Abstract: A mixer for viscous liquids having an inlet for connection to a pressurized source of the liquids and an outlet for the mixed liquids. A series of chambers are arranged between the inlet and the outlet, these chambers being separated by several convergent/divergent surfaces providing narrow openings between said chambers. The openings are in the form of slits defined by the inner edges of dies which also form the convergent/divergent surfaces upstream and downstream of the slits. The chambers include parallel sided portions which allow for quiescent flow of liquid through these portions. At least some of the dies are movable to adjust the width of the slits. Preferably, the dies and chambers are annular and concentric, and the liquids pass radially inwardly through the narrow openings during mixing and are subjected to increasing stress as they progress through the slits.

Abstract: In order to discipate energy from a high pressure fluid without causing damage and environmental nuisanse an energy loss device is used. This device includes energy loss paths including void areas arranged to draw energy from the high pressure fluid as it passes through the path. These paths may also include turns and other features to enhance energy loss.

Abstract: A fuel injection nozzle has a tubular body adapted to receive fuel from a fuel line. A restriction member received at the inlet end of the tubular member limits the flow of fuel into the nozzle and is adjustable between minimum and maximum flow rates. The restriction member has an upstream member with a maximum flow orifice through which fuel entering the nozzle passes. A downstream restriction member nests within the upstream member such that a wall of the downstream member is in circumjacent, sliding relationship to a corresponding wall in the upstream member. The downstream member has a minimum flow orifice for establishing the minimum fuel flow into the nozzle and orifices in the wall portion which are blocked by the wall portion of the upstream member in the minimum flow position of the members and are subject to progressive unblocking to thereby establish a flow rate through the nozzle above the minimum.

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 fluid pressure regulator includes a diaphragm operated leakport controlling low liquid or fluid flow rates. A precisely formed leakage unit spaced from the leakport establishes continuous flow from the input to the output. The leakage unit includes a separate orifice unit having an integral molded body and internal precision orifice establishing the continuous flow. A multiple mold core unit for molding an integral body and orifice including a pair of aligned mold cores have opposed planar surfaces located at the orifice plane. A small gap is held between the opposed end surfaces. The orifice unit is molded as a single plastic element without flash at the orifice. The orifice has a diameter in the range of about 0.001 to 0.030 inches, and may be used in various applications requiring precise low flows. The orifice unit may include an elongated tubular body with an internal orifice molded as single integral members.

Abstract: A device and method for creating favorable conditions for achieving adjustable laminar fluid flow is described. In the practical example of a thermal mass flow meter the laminar flow element contains a porous, open celled, flexible material such as stainless steel mesh. The mesh creates a labyrinthine flow path, for the creation of laminar fluid flow, within the laminar flow element. Means for compressing or elongating the steel mesh renders the laminar flow element adjustable over an extended fluid flow range, and provides optimal fluid dynamics.

Abstract: One piece, in-line, water pressure compensating with self-regulation emitter, consisting of one regulator cylinder permanently embodied inside a water conduit on which conduit holes have been opened, at the point where the emitter is embodied, so that the water drips out onto the soil. The emitter self-regulates to provide a constant emission of water. This self-regulation is accomplished by a flexible part of the emitter body, which deforms in response to pressure variations within the water conduit.

Abstract: The invention relates to a flow limiter for hydraulic fluid, comprising at least one passage (14) of reduced cross-section for the hydraulic fluid, the passage (14) being formed between two contiguous pieces (12, 22) each having at lest one planar face (10, 20), at least one of the two pieces (12, 22) comprising a recessed impression (14) on at least one of its faces (10, 20), the passage (14) of reduced cross section being defined within the space situated between the recessed impression (14) formed on a planar face (10) on one of the pieces and the planar face (20) of the other piece (22), the length of the passage (14) of reduced cross section being adjustable by varying the relative position of the two pieces (12, 22). According to the invention, a pierced hole (18) is made in one piece (12) at one end of the passage (14) of reduced cross section and in that a pierced hole (24) is made in the other piece (22) at the other end of the passage (14) of reduced cross section.

Abstract: A process for the continuous production of an irrigating tube having trickling elements embedded between an inner tube and an outer tube; provides that, after extrusion of an inner tube and subsequent cooling of the tube, the latter is perforated at regular intervals to produce inlet orifices, that the tube is subsequently heated up again, at least in the region of the perforations, and that thereafter a trickling element is pressed into the surface of the inner tube in each case at the heated-up perforation points and is thereby connected to the inner tube. The inner tube and trickling elements are subsequently surrounded by an outer tube, in which outer outlet orifices are made at the points of the trickling elements.

Abstract: The invention provides a flow control system well suited for use in intravenous fluid delivery systems comprising a flow restrictor wafer having one or more flow limiting flow restrictor paths formed thereon. The system provides fixed flow rate control. The system also provides means for selectively orienting at least two flow restrictor paths relative to the main fluid passage to varying the flow rate.

Abstract: A variable flow restrictor valve is disclosed that is adapted to be inserted in a fluid line to provide first and second alternative flow paths therethrough in accordance with the pressure differential between inlet and outlet ends of the valve. The assembly is characterized by use of a moveable orifice tube which defines one of the alternative paths and an intermediate part of a valve housing defines a flow path which forms another alternative flow path having flow therethrough regulated by a stop disk and a valve disk both of which are fixed to the orifice tube on either side of the intermediate part to position the valve disk to either close or open the another alternative flow path in accordance with the aforesaid pressure differential.

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: The invention provides a flow control system well suited for use in intravenous fluid delivery systems comprising a flow restrictor wafer having one or more flow limiting flow restrictor paths formed thereon. The system provides fixed flow rate control. The system also provides means for selectively orienting at least two flow restrictor paths relative to the main fluid passage to varying the flow rate.

Abstract: Elastic anti-vibration isolation apparatus with integrated hydraulic damping, consisting of a thick conical membrane of elastomer compound bonded to internal and external rigid frames, and crimped in a casing containing a damping liquid, characterized by the fact that the rigid partition which separates the variable volume chamber from the expansion space has a passage for the damping liquid realized in one or two parts, the dimensions of which can be adjusted by grinding or lathe-working at least one of the components, base or cover, of the rigid partition, or by the insertion of shims between the constituent parts, thereby making it possible, using a set of similar components, to realize a range of elastic mountings with damping characteristics adapted to desired utilization frequencies.

Abstract: A fluid controller has a disk-shaped body member with a positioning mechanism and lip mechanism. The controller is unitary and when positioned in a fluid flow in a first position enables fluid to flow through an axial bore in the disk-shaped member and around the disk member and in a second position enables fluid flow only through the axial bore.

Abstract: The invention provides a flow control system well suited for use in intravenous fluid delivery systems comprising a flow restrictor wafer having one or more flow limiting flow restrictor paths formed thereon. The system provides fixed flow rate control. The system also provides means for selectively orienting at least two flow restrictor paths relative to the main fluid passage to varying the flow rate.

Abstract: A fluid controller has a disk-shaped body member with a positioning mechanism and lip mechanism. The controller is unitary and when positioned in a fluid flow in a first position enables fluid to flow through an axial bore in the disk-shaped member and around the disk member and in a second position enables fluid flow only through the axial bore.

Abstract: A cylindrical, or part cylindrical, diaphragm for a drip emitter is disclosed, the diaphragm having a depressed labyrinthine path in the outer face thereof. The path is constituted by a groove, there being one or more holes in the diaphragm which place one end of the groove in communication with the interior of the diaphragm. The diaphragm has a thinner area which forms a distortable membrane. The other end of the groove communicates with the space which lies radially outwardly of the membrane. The diaphragm is placed in a cylindrical holder which has a hole in the walling thereof. Said membrane extends over the hole in the holder.

Abstract: Programmable pressure reducing apparatus for throttling fluids under high energy in which standardized parts can be stacked and nested to achieve a wide range of restriction and expansion points interposed in tortuous fluid flow paths which divide and recombine the fluid a plurality of times to dissipate high energy without incurring cavitation.

Abstract: A volume governor for flowing media under static pressure formed as a throttle member and including a segmented cone with the angle of cone of about 90.degree. and made of plastics, a bore formed at an open apex is closed with a plug. The plug is made of elastic material with high damping properties. The bottom of the cone is closed with a perforated bottom plate.

Abstract: The invention contemplates a valve construction which provides a radially stacked succession of mutually fitted concentric annuli fitted to an inner tubular member which is open at one end for accommodating inlet fluid flow and which is adapted along its bore and at the opposite end to guide a poppet member that is axially positionable in the bore. The tubular member has a circumferentially and axially distributed plurality of like radial passages adapted to be opened and closed in accordance with the guided position of the poppet member. Progressively increasing pluralities of such radial passages characterize each successive annulus, and all annuli are circumferentially channeled to define a manifolded relation between the plural passage discharges from one annulus and the plural passage inlets of the next annulus. Outlet or downstream flow from the valve is taken from a circumferential manifold around the outermost multiple-ported annulus.

Abstract: A variable infusion device for administering liquids parenterally to a patient is formed of inexpensive plastic members. The device includes an elongated passage defined between two members of the device which are bonded to one another. A third member is movable relative to the first and second members to change the length of the elongated passage through which liquid flows thereby changing the flow rate of the liquid through the device. The liquid flow rates to the patient can be incrementally adjusted over a wide range of flow rates. Settings also include a flow rate for merely keeping the patient's vein open.

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.