Abstract: A valve for downhole use has the ability to throttle between fully open and closed and is fully variable in positions in between. The valve is preferably responsive to flowing fluid viscosity and uses a three dimensional flow through restrictor in combination with a relatively movable cover. At a given flow, a higher viscosity fluid will create a greater relative movement and make it possible for flowing fluid to bypass more of the flow through member. In a particular application involving production from a zone, an array of such valves can allow more production where the viscosity is higher and less production where the viscosity drops due to, for example, water production.

Abstract: A water saving device for use at or near a water outlet has a first water flow regulating element; a second water flow regulating element disposed downstream of the first regulating element; and a chamber formed between the first and second regulating elements. All of one or more water flow regulating parts of the second regulating element are made from substantially solid material.

Abstract: An injection device such as a syringe, which has a helical flow path for a solution in which the solvent and solute have been introduced. The helical flow path is formed by a helically configured member which has general overall configuration of a helical coil spring. Individual coils may be formed to have a groove located along the length of the helix. When compressed, the novel member effectively takes on a cylindrical outer configuration. Because the groove is covered and sealed by the surface of the next turn of the helix when compressed, an enclosed helical flow path is formed in the compressed member. The invention may be an injection device using the novel flow path forming member or alternatively, the flow path forming member itself.

Abstract: A device for delivering gas is disclosed. The device may include a chamber and a guide. The chamber may include a set of input openings for receiving the gas and an output opening for providing the gas. The set of input openings may include a first hole and a second hole. The chamber may receive a first portion of the gas through the first hole and a second portion of the gas through the second hole. The guide may include a guiding unit. The guiding unit may be disposed inside the chamber. The guiding unit may contact the first portion of the gas before the first portion of the gas contacts the second portion of the gas and may contact the second portion of the gas before the second portion of the gas contacts the first portion of the gas.

Abstract: A choke assembly. In some embodiments, the choke assembly includes a choke element having a fluid flow passage therethrough. The choke element includes a cage having a plurality of apertures therethrough for the passage of fluid and a plug moveable with respect to the cage. The plug has an end surface that defines a boundary of the fluid flow passage through the choke and is moveable to open or close each of the apertures through the cage, whereby the flow of fluid through the cage is controlled. The apertures in the cage are disposed in a first portion and a second portion separated by a land. Each of the first and second portions has a least one aperture therein. The plug may be positioned with its end surface disposed to intersect the land, such that each aperture is fully open or fully closed to the flow of fluid.

Abstract: A fluid flow regulator (20) comprising: a fluid inlet port (34) and a fluid outlet port (54); at least one open-faced flow control channel (60) defined by a planar bottom (62) and two sidewalls (64) that communicates with the outlet port (54) at a junction (66) and has a cross-section that decreases with distance from the junction; an elastic diaphragm (40); a support shelf (58) on which the diaphragm (40) seats and which supports the diaphragm (40) along a planar contour parallel to the bottom of each of the at least one channel (60); wherein to regulate fluid flow, with increasing inlet fluid pressure the diaphragm (40) covers portions of the open face that are farther from the junction (66) in a region where the cross-section decreases with distance from the junction (66).

Abstract: A hydraulic restrictor comprising: a passage along which hydraulic fluid flows; a member which extends along the passage, the member restricting the flow along the passage; and structure for selectively securing the member at a plurality of different positions along the passage thereby to enable variation in the restriction on flow along the passage, the securing structure securing the member at each position by securing the member against the side wall of the passage.

Abstract: Trim disk assemblies for use in fluid flow control devices include a first disk and a second disk. An elongated void is formed in a surface of each of the first disk and the second disk. The second disk is aligned with the first disk to provide fluid communication between the void of the first disk and the void of the second disk, the void of the first disk being offset or staggered from the void of the second disk. The void of the first disk and the void of the second disk at least partially define a fluid passageway having a cross-sectional area characterized by increases and decreases in cross-sectional area, which define an expansion/contraction mechanism of the fluid passageway.

Abstract: A method of blocking a water out zone in a production well includes the steps of connecting a throttle unit to a dump bailer, wherein the throttle unit is internally defined a flowing space, which can be adjusted in size to thereby control a flow rate of cement for blocking the water out zone; loading the cement into the dump bailer; slowly lowering down the loaded dump bailer to the water out zone in the production well; opening an outlet of the dump bailer under control, so that the cement flows from the dump bailer into the throttle unit and is released at a flow rate preset by adjusting the size of the flowing space; allowing the released cement to load up in the water out zone and slowly permeate into a gravel layer in the production well before becoming cured to block the water out zone.

Abstract: A choke that is usable with a well includes an inlet port and an outlet port. The choke also includes pressure drop stages between the inlet port and the outlet port. Each of the pressure drop stages is adapted to create part of an overall pressure differential between the inlet and outlet ports.

Abstract: A drip emitter is provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. Water enters the emitter through a first inlet and proceeds into a first chamber. When the water pressure is above a predetermined level, a one-directional valve opens to allow fluid flow past the first chamber, through a tortuous path flow channel, and through an emitter outlet. A second inlet is used to compensate for water pressure fluctuations in the supply tube to maintain output flow at a relatively constant rate. Water enters the second inlet and presses a flexible diaphragm toward a water metering surface to provide pressure-dependent control of the output flow. A copper member is mounted to the emitter over the emitter outlet to prevent plant root intrusion into the emitter outlet.

Abstract: A pulsation attenuator for a fluidic system with a fluidic pump. The pulsation attenuator includes a fluidic channel, a first fluidic device adapted to attenuate pulsations, and a second fluidic device adapted to attenuate pulsations. Preferably, the first fluidic device includes a first fluidic resistor and a first fluidic capacitor, and the second fluidic device includes a second fluidic resistor and a second fluidic capacitor. Preferably, the first fluidic resistor and second fluidic resistor are resistive channels. Preferably, the first fluidic capacitor and second fluidic capacitor include a membrane that expands and accumulates fluid and then contracts and reintroduces the accumulated fluid into the fluidic channel.

Abstract: A flow regulator (50) having a controller housing (1) which has a central body (3) in a passage channel (2) is provided, with the central body (3) being bounded by an annular throttle body (4) made from an elastic material that delimits a control gap (6) between itself and an adjacent peripheral lateral surface (5) which is provided with control recesses (7, 7?) that are spaced apart from one another in the circumferential direction and are oriented in the flow direction (Pf1, Pf2), with the passage cross-section of the control gap (6) being variable via the throttle body (4) deforming under the pressure difference created as the flow passes through.

Abstract: An annular choke mechanism is incorporated into a flow path within the outer housing of the sleeve valve to the interior flow ports of the sliding sleeve member. As the sliding sleeve member is moved axially within the housing, the lateral fluid ports of the sliding sleeve member are aligned within particular bore portions so that the size of the annular space between the fluid ports in the housing and the fluid ports in the sleeve is varied. The annular flow area through the annular space governs the rate of fluid flow through the valve.

Abstract: The invention relates to a sanitary component, namely a stream regulator or stream former for flowing fluid media, consisting of property-defining components in a sandwich-like arrangement in the direction of flow which comprise at least one screen attachment, one diffuser plate assembly as well as a shell body having segments of stream-forming openings extending across its cross-sectional surface. The property-defining components are exchangeable and combinable so as to realize adaptability to different user and user requirements. A locking means is provided e.g. on the inner circumference of the shell body for this purpose as is a corresponding counter-locking means on the outer circumference of the diffuser plate assembly. The diffuser plate assembly exhibits, at least on its exterior, a flow rate class-specifying optical code and the shell body exhibits a stream type-specifying, namely laminar or aerated, optical code.

Abstract: The invention relates to an improved homogenization valve, and more particularly, but not exclusively, to a homogenization valve for use in homogenizing emulsion explosives. The homogenization device comprises a body having a flow passage therethrough, opposing first and second homogenization members located in the flow passage; the homogenization members having opposing homogenization surfaces that form a flow restriction of the flow passage therebetween. At least one of the homogenization surfaces has a flow resistance being suitable to cause at least part of the flow passing through the flow restriction to be diverged in a non-linear path across the homogenization surface.

Abstract: A flow regulator (10) having a regulator housing (1) which is provided with a control device (8a) having a central body (3a) in a passage channel (2). An annular throttle body (4a) produced from an elastic material bounds the central body (3a) and defines a control gap (6a) between the throttle body (4a) and an adjacent peripheral surface (5a) that is provided with control recesses (7a) that are oriented in a flow direction (Pf1, Pf2). The passage cross-section of the control gap can be varied by the throttle body which is deformed by the pressure difference caused during throughflow. In the present flow regulator (10), there are two control devices (8a, 8b) arranged one behind the other the longitudinal direction of the passage channel (2), with the two control devices (8a, 8b) being configured for different throughputs and/or pressure ranges.

Abstract: A regulator for a clutch includes a regulator housing, first and second plates in the regulator housing, and a support plate attached to the regulator housing. The first plate may be convex in a direction opposite the second plate. The first plate may include at least one oil passage hole. The first plate may be thinner than the second plate. A first damping member may be provided between the regulator housing and the first plate, and a second damping member may be provided between the second plate and the support plate.

Abstract: An annular elastomer is provided in a housing orifice that does not require a large force for deformation. This makes possible a solenoid-type actuator that provides a large displacement of the elastomer, thus allowing higher and lower rates of gas flow through a gas line.

Abstract: A choke that is usable with a well includes an inlet port and an outlet port. The choke also includes pressure drop stages between the inlet port and the outlet port. Each of the pressure drop stages is adapted to create part of an overall pressure differential between the inlet and outlet ports.

Abstract: A flow regulator (50) having a controller housing (1) which has a central body (3) in a passage channel (2) is provided, with the central body (3) being bounded by an annular throttle body (4) made from an elastic material that delimits a control gap (6) between itself and an adjacent peripheral lateral surface (5) which is provided with control recesses (7, 7?) that are spaced apart from one another in the circumferential direction and are oriented in the flow direction (Pf1, Pf2), with the passage cross-section of the control gap (6) being variable via the throttle body (4) deforming under the pressure difference created as the flow passes through.

Abstract: A flow regulator (10) having a regulator housing (1) which is provided with a control device (8a) having a central body (3a) in a passage channel (2). An annular throttle body (4a) produced from an elastic material bounds the central body (3a) and defines a control gap (6a) between the throttle body (4a) and an adjacent peripheral surface (5a) that is provided with control recesses (7a) that are oriented in a flow direction (Pf1, Pf2). The passage cross-section of the control gap can be varied by the throttle body which is deformed by the pressure difference caused during throughflow. In the present flow regulator (10), there are two control devices (8a, 8b) arranged one behind the other the longitudinal direction of the passage channel (2), with the two control devices (8a, 8b) being configured for different throughputs and/or pressure ranges.

Abstract: The present invention provides a device for reducing the amount of water or other fluid discharged at a tap (4), which device comprises a body member (1) having an inlet adapted to be connected to a supply of water or other fluid, dual outlets through which the fluid is to be discharged to the locus, one fluid path between said inlet and said outlet is controlled by a flow/pressure responsive valve mechanism (10) located in the inner fluid path (9) between said inlet and outlet.

Abstract: A fluid flow control valve comprises a plurality of vortex, fluid pressure reduction chambers 1, each vortex chamber having an inlet in the form of a curved flowpath 2 having an inlet orifice 3 of defined cross sectional area which decreases along the length of the inlet flowpath to a minimum point at a throat 4 close to which it opens into the vortex chamber 1. The fluid flow within the vortex chamber takes a generally spiral flow path having both radial and axial components from the throat 4 towards an outlet 5 positioned substantially axially at an end of the vortex chamber, the curvature of the inlet flowpath being such that the direction of the flow therein is in substantially the same direction as the radial component of the flow within the vortex chamber.

Abstract: A water saving device for use at or near a water outlet has a first water flow regulating element; a second water flow regulating element disposed downstream of the first regulating element; and a chamber formed between the first and second regulating elements. All of one or more water flow regulating parts of the second regulating element are made from substantially solid material.

Abstract: An accumulator comprises a housing connected to a hydraulic system, an elastomeric bladder separating a gas compartment from a fluid compartment, and an anti-extrusion device. A method for operating an accumulator comprises connecting the accumulator to a hydraulic system, injecting an inert gas into a gas compartment to a precharge pressure, moving an anti-extrusion device to prevent a bladder from extruding into the hydraulic system, running the accumulator and the hydraulic system downhole, moving the anti-extrusion device to allow fluid communication between the hydraulic system and a fluid compartment, generating pressure fluctuations within the hydraulic system, and expanding or contracting the bladder in response to the pressure fluctuations without moving the anti-extrusion device.

Abstract: A medical apparatus flow restrictor includes a housing having an inlet and an outlet, and a fluid flow path defined through the housing between the inlet and outlet. At least one pair of opposed restriction surfaces are provided in contact with each other within the housing between the inlet and the outlet. The restriction surfaces are disposed in the flow path such that fluid delivered to the inlet passes between the opposed restriction surfaces prior to flowing from the outlet. At least one of the restriction surfaces comprises a pattern of fluid passages formed into the surface, the passages having a size and shape and cooperating with the opposed restriction surface such that a desired flow rate of fluid is achieved through the restrictor.

Abstract: Fluid pressure reduction devices for use in gas and liquid handling systems are disclosed. An example fluid pressure reduction device includes a plurality of cylinders, each having an inner diameter surface and an outer diameter surface and a plurality of apertures that extend from the inner diameter surface to the outer diameter surface. The cylinders are arranged in a nested configuration so that a substantial portion of the inner diameter surface of one of the plurality of cylinders is in contact with a substantial portion of the outer diameter surface of another one of the cylinders. Portions of the apertures of one of the cylinders overlap at least portions of the apertures of another one of the cylinders to form a process fluid flow path.

Abstract: A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Abstract: A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Abstract: A reverse osmosis water filtering system includes a reverse osmosis membrane having first output port for permeate water, second output port for concentrate water, and intake port for receiving filtered water, a filtering assembly providing filtered water to the membrane, and a flow restrictor restricting a flow of concentrate water from the membrane to a water source, the flow restrictor including a housing defining an elongated conduit having a tapering conical wall defining a first screw thread and a water-channel thread extending therealong including generally between a first opening into a distal region of the conduit for receiving a flow of liquid and a second opening into a proximal region of the conduit, and an axially elongated plug received into the conduit, a surface of the plug opposed to the tapering conical wall defining a second screw thread and a tapering surface, the second screw thread disposed in threaded engagement with the first screw thread defined by the conical wall of the housing, opp

Abstract: An adjustable high pressure, low flow metering valve provides a sleeve extending about a restrictor shaft, the sleeve having a narrow helical groove formed in the inside diameter. A restrictor shaft within the sleeve encloses the groove and forms a sealed helical flow channel. The length of the flow channel is varied by withdrawing the restrictor shaft in the sleeve, whereby only a selected axial extent of the groove is enclosed by the sleeve to form a confined flow path. The shaft is provided with a threaded engagement in the body of the metering valve, so that rotation of an adjustment knob provides extremely fine control of the length of the flow path, and thus highly accurate selection of the flow resistance.

Abstract: A one-piece manifold for a reverse osmosis system includes a filter configured to receive water from a water port and a membrane configured to receive filtered water via a first conduit. The membrane is also configured to send permeate water to a reverse osmosis tank. The manifold also includes a flow restrictor configured to receive concentrate water from the membrane via a second conduit and to pass the concentrate water to a drain port.

Abstract: A rotary ball valve assembly for a rotary ball valve comprises a rotary closure element and an impedance assembly. The closure element is rotatable about a rotational axis, and has a through-bore defining a flow inlet and a flow outlet. The impedance assembly is positioned, at least in part, within the bore of the closure element. The impedance assembly includes a plurality of flow passages therethrough. An inlet and/or outlet of two or more of the flow passages is elongate and arcuate so that, in use, as the closure element rotates, the arcuate elongate inlet and/or outlet of each flow passage which is exposed is fully or substantially fully opened.

Abstract: A dripper apparatus for a water spigot includes a coupler having a threaded female member for connecting to a water spigot. A generally cylindrical elongate member has a longitudinal portion in fluid communication with the female member. The longitudinal portion has an upper portion that defines a seat within the female member. A flow controller sits on the seat. A filter screen upstream the flow controller collects particles in water flowing therethrough so that the controller does not become clogged. The flow controller includes a housing that is provided with an upper inlet for receiving a first flow rate of water from a water spigot. The housing also includes a cavity therewithin and the cavity is in fluid contact with the upper inlet. A flexible membrane is housed within the cavity and floats when water enters the cavity via the upper inlet. The upper inlet is slotted at the top thereof for further filtering water flowing therethrough.

Abstract: A bi-directional flow-control device includes a housing defining a flow passage and first and second orifices installed in the passage, each orifice being tubular and having a seat, each seat having a plurality of circumferentially spaced flow-control channels, the seat of the second orifice being axially spaced from and facing the seat of the first orifice. A resiliently deformable diaphragm is disposed between the seats, whereby flow through the passage in a first direction urges the diaphragm against the seat of the first orifice and flow through the passage in an opposite second direction urges the diaphragm against the seat of the second orifice. The diaphragm in each case deforms into the channels in the seat to varying degrees as a function of pressure differential such that in either flow direction the flow is regulated to a substantially constant volumetric flow rate over a range of pressure differentials.

Abstract: A flow regulator (1) having a regulator housing (2) in which, in a flow channel, an annular flow restrictor (5) made of elastic material is provided that is pushed onto a fastening post (4) and encircles this post. The post (4) has at least two fastening webs (6), oriented opposite a direction in which the elastic material is pushed on, whose free ends engage the flow restrictor (5) from behind in a securing manner. The flow restrictor (5) limits, between itself and at least one fixed part of the housing, a control gap whose flow cross-section can be modified by the flow restrictor (5), which deforms under the pressure difference that arises during flow. In the flow regulator according to the present invention the fastening webs (6) are fashioned as resilient webs that can be flexibly inwardly deflected. The flow regulator (1) according to the present invention can be manufactured economically and with a low cost, and is distinguished by its high degree of functional reliability.

Abstract: A method and apparatus for receiving a flow of fluid and restricting the flow through a device are described. The apparatus includes an insert having a shaped surface including at least one through-hole located off-center. The shaped surface may be a bell-shaped curve in cross-section. The method includes supplying a flow of fluid to one side of the apparatus, redirecting a portion of the flow of the fluid onto itself, and directing the flow to the at least one through-hole.

Abstract: A method and apparatus for receiving a flow of fluid and restricting the flow through a device are described. The apparatus includes an insert having a shaped surface including at least one through-hole located off-center. The shaped surface may be a bell-shaped curve in cross-section. The method includes supplying a flow of fluid to one side of the apparatus, redirecting a portion of the flow of the fluid onto itself, and directing the flow to the at least one through-hole.

Abstract: A flow regulator (1) having a regulator housing (2) in which, in a flow channel, an annular flow restrictor (5) made of elastic material is provided that is pushed onto a fastening post (4) and encircles this post. The post (4) has at least two fastening webs (6), oriented opposite a direction in which the elastic material is pushed on, whose free ends engage the flow restrictor (5) from behind in a securing manner. The flow restrictor (5) limits, between itself and at least one fixed part of the housing, a control gap whose flow cross-section can be modified by the flow restrictor (5), which deforms under the pressure difference that arises during flow. In the flow regulator according to the present invention the fastening webs (6) are fashioned as resilient webs that can be flexibly inwardly deflected. The flow regulator (1) according to the present invention can be manufactured economically and with a low cost, and is distinguished by its high degree of functional reliability.

Abstract: A valve or ball reversal orifice provides provide a first flow restriction to a material flowing through the ball reversal orifice and a second flow restriction when the material reverses flow direction. The valve includes a housing having at least first and second walls that define a cavity therein. The cavity is configured such that a cross-sectional area of the cavity taken perpendicular to a longitudinal axis of the cavity decreases from the second wall to the first wall. A first port is provided in the first wall for allowing material to enter or exit a cavity, and a second port is provided in the second wall for allowing material to enter or exit the cavity. A flow restrictor, such as a ball, disposed in the cavity and is movable between a relatively large portion of said cavity and a relatively small portion of said cavity to provide different flow restriction depending on the direction of material flow through the cavity.

Abstract: A device for controlling liquid flow in a conduit which is of a hat-like configuration defined by a cylindrical base part having a flange part at one end and a closure part at another end joined thereto by an integral spring which bends to permit through-flow of liquid through a peripheral gap between the body part and the closure part. The gap is of a stepwise progression including either an abrupt or curved step. The gap has a medial gap portion and opposite gap portion ends which are relatively sized to effect the stepwise progression.

Abstract: A choke valve for an automatic transmission is formed from a valve hole having a circular section that runs through a valve body in its thickness direction and a columnar valve main body that is fitted in the valve hole. The valve main body has a pair of annular channels formed on the outer periphery of the valve main body at opposite ends and a small diameter section formed between the two annular channels, the small diameter section together with the valve hole forming a choke. An inlet port and an outlet port formed between two separator plates and oil channels formed on opposite faces of the valve body communicate with the pair of annular channels, respectively. Thus, the structure of the choke valve for an automatic transmission is simplified, thereby reducing the cost.

Abstract: An extensional flow mixer especially for viscous liquids has a housing with an end inlet connectable to a pressurized source of the liquids, and an outlet at an opposite end of the housing. A mandrel located in the cavity has protrusions with sloping side surfaces, the outer edges of which cooperate with the internal surface of the cavity to divide the cavity into a series of chambers separated by slits, such that liquid passes successively through all the chambers and slits in moving from the inlet to the outlet. The slits have cross-sectional areas which decrease in the liquid flow direction. The mandrel sides have helical grooves forming passageways with the housing wall which allow liquid to be distributed evenly around the edges of the mandrel to the inlet end or upstream chamber. The mandrel may rotate to provide additional shear mixing.

Abstract: An extension flow mixer especially for viscous liquids has a housing (10) with an end inlet (12a, 14a) connectable to a pressurized source of the liquid, and an outlet (119) at an opposite end of the housing (10). A mandrel (30) located in the cavity has protrusions (20′, 32′) with sloping side surface, the outer edges of which cooperate with the internal surface (114a) of the cavity to divide the cavity into a series of chambers separated by slits, such that liquid passes successively through all the chambers and slits in moving from the inlet (12a, 14a) to the outlet (119). The slits have cross-sectional areas which decrease in the liquid flow direction. The mandrel (30) sides have helical grooves (134) forming passageways with the housing wall (114a) which allow liquid to be distributed evenly around the edges of the mandrel (30) to the inlet end or upstream chamber. The mandrel (30) may rotate to provide additional shear mixing.

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 valve or ball reversal orifice provides provide a first flow restriction to a material flowing through the ball reversal orifice and a second flow restriction when the material reverses flow direction. The valve includes a housing having at least first and second walls that define a cavity therein. The cavity is configured such that a cross-sectional area of the cavity taken perpendicular to a longitudinal axis of the cavity decreases from the second wall to the first wall. A first port is provided in the first wall for allowing material to enter or exit a cavity, and a second port is provided in the second wall for allowing material to enter or exit the cavity. A flow restrictor, such as a ball, disposed in the cavity and is movable between a relatively large portion of said cavity and a relatively small portion of said cavity to provide different flow restriction depending on the direction of material flow through the cavity.

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: An apparatus for providing a variable pitch thread includes a hollow cylindrical element configured to provide a plurality of parallel, radially projecting ridges extending circumferentially around the cylindrical element and spaced apart with a given step as measured parallel to a central axis of the cylindrical element. The cylindrical element also featuring a slit extending substantially parallel to the central axis along the length of the cylinder. An actuation mechanism is configured to selectively generate controlled relative displacement between the opposing edges on opposing sides of the slit so as to vary a helical angle of the projecting ridges relative to the central axis. The actuation mechanism is preferably configured to relatively displace the opposing edges such that the plurality of projecting ridges together form alternatively a helical pattern and a pattern of substantially closed rings.

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.