Abstract: An apparatus includes an inflow control device that is disposed in a well and is adapted to receive a flow. The inflow control device includes a chamber, an outlet and at least one inlet. The chamber has a first end, a second end, and a cross-section of the chamber decreases along a length of the chamber. The outlet is disposed at the second end of chamber. The inlet has a cross-sectional dimension and is adapted to, in response to the received flow, inject a flow into the chamber near the first end of the chamber such that a fluid flow is produced inside the chamber that rotates and translates in a direction along the length of the chamber toward the outlet.

Abstract: A subterranean well stimulation and cleaning tool comprising an upper chamber, a splitter, at least two diffuser legs having proximal ends in fluid communication with the upper chamber and distal ends in fluid communication with a lower chamber, and a laterally disposed crossover channel connecting the at least two diffuser legs between the proximal and distal ends, whereby fluid pulses are generated inside the upper chamber from a substantially constant fluid flow received into the tool from the well surface and are alternately directed through the at least two diffuser legs and into the lower chamber, where the fluid pulses are intensified prior to discharging them from the tool through a nose block or other device disposed downstream of the tool.

Abstract: An airflow system is provided that utilizes a vortex generator to efficiently draw ambient air into one or more automotive heat exchangers. Due to the use of the vortex generator, the air intake may be much smaller than that used in a conventional system and may have a significantly different aspect ratio from that of the heat exchanger, thus providing additional vehicle design flexibility. The vortex generator may use a single outlet or multiple outlets, and may be coupled directly or via a transition duct(s) to the heat exchanger(s).

Abstract: A washing machine of the present invention comprises: a casing; a tub disposed inside the casing, for accommodating water; a drum rotatably provided inside the tub, for accommodating laundry therein; a gasket interposed between the casing and the tub, for preventing the water inside the tub from leaking between the tub and the casing; a gasket nozzle provided at the gasket, for circulating the water and spraying into the drum; a spiral nozzle provided at the gasket, for converting the water into a spiral flow and spraying into the drum; and a turbo wash button for setting or canceling a turbo wash for spraying water through the gasket nozzle when the drum is rotated or for spraying water through the spiral nozzle when the drum is rotated.

Abstract: An apparatus is described for controlling flow of fluid in a tubular positioned in a wellbore extending through a subterranean formation. A flow control system is placed in fluid communication with a main tubular. The flow control system has a flow ratio control system and a pathway dependent resistance system. The flow ratio control system has a first and second passageway, the production fluid flowing into the passageways with the ratio of fluid flow through the passageways related to the characteristic of the fluid flow. The pathway dependent resistance system includes a vortex chamber with a first and second inlet and an outlet, the first inlet of the pathway dependent resistance system in fluid communication with the first passageway of the fluid ratio control system and the second inlet in fluid communication with the second passageway of the fluid ratio control system.

Abstract: Apparatus and methods for controlling the flow of fluid, such as formation fluid, through an oilfield tubular positioned in a wellbore extending through a subterranean formation. Fluid flow is autonomously controlled in response to change in a fluid flow characteristic, such as density or viscosity. In one embodiment, a fluid diverter is movable between an open and closed position in response to fluid density change and operable to restrict fluid flow through a valve assembly inlet. The diverter can be pivotable, rotatable or otherwise movable in response to the fluid density change. In one embodiment, the diverter is operable to control a fluid flow ratio through two valve inlets. The fluid flow ratio is used to operate a valve member to restrict fluid flow through the valve.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: A Joule-Thompson or other throttling valve comprises an outlet channel (7) in which swirl imparting means (10) impose a swirling motion to the cooled fluid stream discharged by the valve, thereby inducing liquid droplets to swirl towards the outer periphery (7A) of the fluid outlet channel (7) and to coalesce into enlarged liquid droplets (17) which can be separated easily from a gaseous or other carrier fluid.

Abstract: An arrangement for a control valve for controlling pressure and flow rate of a fluid, the fluid flowing via an inlet into the control valve being brought to rotate about a main flow axis before the fluid, at least with reduced pressure or speed energy, flows via an outlet opening from the control valve and where at least one inlet port communicating with the inlet being provided tangentially in relation to an inlet portion of the speed reduction chamber located in the control valve, and where the speed reduction chamber, provided substantially concentric with the main flow axis, is divergent over at least the first portion of the main flow direction.

Abstract: A connector for a flow managing device in fluid communication with an outlet conduit is disclosed. The connector can comprise a receiving member, an engaging member, and an adapter. The receiving member can be secured to the adapter, which can be secured to a side wall of a basin near an outlet coupled to the outlet conduit. The adapter can comprise a curvature plate having a curvature that complements a curvature of the side wall. The adapter can further comprise an adapter bore through the curvature plate and an adapter conduit extending from the curvature plate and at least partially overlapping the adapter bore. The flow managing apparatus can be secured to the engaging member, which can be engaged with the receiving member. Fluid from the basin can flow through the flow managing device, the engaging member, the receiving member, and the adapter and into the outlet conduit.

Abstract: A fluid flow control device disposable in a bore can include channels that can direct fluid flow based on one or more properties of the fluid more robustly. The channels may include a side channel between two other channels. The side channel can allow fluid flow to affect fluid flowing in one of the channels. Devices according to some aspects can differentiate between fluids having close, but different, properties and direct the fluid accordingly. Examples of fluid properties based on which the device can direct fluid include fluid density, fluid velocity, fluid viscosity, and Reynolds number of the fluid flow.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: The invention relates to a method of using new flushing ports (1A, 1B) when cleaning a piston accumulator (7). Dirty hydraulic oil is returned out via the main port (2) and a return passage (9) until a cleanness grade has been reached. Clean hydraulic oil is forced into the piston accumulator (7) via the axial bores (3A, B) of the flushing ports (1A, B) and further in sloping bores (3C, D), bringing the hydraulic oil into the volume (8) in an upward, tangential direction below the piston (5), into a flushing circulation. By reducing the gas pressure on the gas side (4) of the piston (5) in relation to flushing pressure input from a valve (6), a volume (8) is created on the oil side between the piston (5) and the end bottom (3). The return passage (9) is closed and the piston (5) is brought into its upper position, so that an internal cylinder wall (10) is cleaned.

Abstract: According to an embodiment, an exit assembly comprises: a first fluid inlet; a first fluid outlet; and at least one fluid director, wherein the fluid enters the exit assembly in one direction, in another direction, or combinations thereof, and wherein the at least one fluid director induces flow of the fluid rotationally about the assembly when the fluid enters in the one direction and impedes flow of the fluid rotationally about the assembly when the fluid enters in the another direction. In another embodiment, the exit assembly includes two or more fluid inlets. According to another embodiment, a flow rate restrictor comprises: a fluid switch; and the exit assembly. According to another embodiment, the flow rate restrictor is for use in a subterranean formation.

Abstract: A connector assembly for a flow restricting apparatus is disclosed. The flow restricting apparatus comprises an outlet configured to be in fluid communication with an outlet conduit. The connector assembly comprises a first member configured to be engaged with the flow restricting apparatus at least partially about the outlet. The first member comprises a first face, a second face, and a bore defined through the first member. The connector assembly comprises a second member comprising a first side, a second side, a bore defined through the second member, at least one projection extending outwardly from the first side of the second member, and sealing means for sealing positioned intermediate the first member and the second member. The at least one projection forms a receiving portion configured to receive a portion of the first member.

Abstract: Regulated pneumatic gas is supplied through a gas supply tube (14) which is welded to a pilot valve housing (18) which accommodates a solenoid valve (16). When the solenoid valve is electrically activated and opened, the pneumatic gas flows through a bifurcated channel (22) which is welded to the pilot valve housing and to a fuel valve mechanism (24A) and to an oxidizer valve mechanism (24B). The force of the pneumatic gas causes pistons (38A, 38B) to actuate respective poppets (36A, 36B). Movement of the poppets results in the dispensing of fuel propellant from a fuel outlet chamber (44A) and the dispensing of oxidizer from an oxidizer outlet chamber (44B). The fuel valve mechanism and oxidizer valve mechanism are positioned and oriented such that the exiting fuel and oxidizer are mixed in a vortex rocket engine.

Abstract: A vortex brake (4) for a liquid drainage system has a vortex chamber (5), an inlet section (6) and an outlet (12), wherein liquid can flow into the inlet section (6), through this into the vortex chamber (5), through this and out through the outlet (12). The vortex chamber (5) has a side wall (9), following a conical face, and a base wall (11). The conical face has a cone axis (10), and the outlet (12) is located at an apex of the conical face. The inlet section (6) has side walls (14) and a bottom wall (15) that extend mutually in parallel in a direction of flow (16) in the inlet section (6), and a ceiling. Said ceiling having a converging ceiling portion, which extends between a first and a second end of the ceiling portion, and which, in said direction of flow, extends converging towards the bottom wall (15).

Abstract: A device for directing the flow of a fluid comprises: a pressure pocket; a first fluid passageway; a pressure source; and a pressure switch, wherein the first fluid passageway operationally connects at least the pressure pocket and the pressure source, and wherein the pressure switch is positioned adjacent to the pressure source. According to an embodiment, depending on at least one of the properties of the fluid, the fluid that flows into the pressure pocket changes. In one embodiment, the change is the fluid increasingly flows into the pressure pocket. In another embodiment, the change is the fluid decreasingly flows into the pressure pocket. According to another embodiment, a flow rate regulator comprises: the device for directing the flow of a fluid; a second fluid passageway; a third fluid passageway; and a fourth fluid passageway.

Abstract: A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. The flow path includes a switch, such as a bi-stable fluidic switch, for reversing the direction of the flow in the vortex chamber. The flow path may include multiple vortex chambers, and the device may include multiple flow paths. A hardened insert in the outlet of the vortex chamber resists erosion. This device generates backpressures of short duration and slower frequencies approaching the resonant frequency of the drill string, which maximizes axial motion in the drill sting and weight on the bit. Additionally, fluid pulses produced by the tool enhance debris removal ahead of the bit.

Abstract: A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. The flow path includes a switch, such as a bi-stable fluidic switch, for reversing the direction of the flow in the vortex chamber. The flow path may include multiple vortex chambers, and the device may include multiple flow paths. A hardened insert in the outlet of the vortex chamber resists erosion. This device generates backpressures of short duration and slower frequencies approaching the resonant frequency of the drill string, which maximizes axial motion in the drill sting and weight on the bit. Additionally, fluid pulses produced by the tool enhance debris removal ahead of the bit.

Abstract: A vortex-controlled variable flow resistance device ideal for use in a backpressure tool for advancing drill string in extended reach downhole operations. The characteristics of the pressure waves generated by the device are controlled by the growth and decay of vortices in the vortex chamber(s) of a flow path. The flow path includes a switch, such as a bi-stable fluidic switch, for reversing the direction of the flow in the vortex chamber. The flow path may include multiple vortex chambers, and the device may include multiple flow paths. A hardened insert in the outlet of the vortex chamber resists erosion. This device generates backpressures of short duration and slower frequencies approaching the resonant frequency of the drill string, which maximizes axial motion in the drill sting and weight on the bit. Additionally, fluid pulses produced by the tool enhance debris removal ahead of the bit.

Abstract: Loss reduction apparatus for a fluid transfer system includes a fluid device. The fluid device defines a first fluid path along which a greater part of a fluid flows in a first condition, and a second fluid path along which a greater part of the fluid flows in a second condition. The apparatus is arranged so that when a leak occurs at a location in the system, the leak causes a relative reduction in fluid pressure at the location, which moves the device from the first condition to the second condition.

Abstract: A coupling is provided preferably for a vortex valve for use on an outlet pipe in a sewerage system. The coupling comprises an outer component for insertion into a bore of a pipe, and an inner component which is inserted into the outer component, ramp means being provided between the two components, whereby the outer component is expanded to seal against the bore when the inner component is inserted into the outer component so as to engage the second ramp portion. The ramp means comprise first and second portions of different inclinations. The vortex valve has a circumferential inlet which is adjustable.

Abstract: An accumulator provided with a flow damper inside, the flow damper including a cylindrical vortex chamber, a small flow pipe connected to a peripheral portion of the vortex chamber along a tangential direction thereto, a large flow pipe connected to the peripheral portion while forming a predetermined angle with the small flow pipe, and an outlet pipe connected to an outlet formed at a central part of the vortex chamber, in which a first junction of the large flow pipe and the vortex chamber of the flow damper is located outside an extension line of an inner surface, at the side of the large flow pipe, of the small flow pipe.

Abstract: A flow control system comprises includes a fluidic control device having a main fluid path for a flow of fluid through the device, and a control fluid path for a control flow of fluid through the device. At least part of the control fluid path coincides with at least part of the main fluid path to control the flow of fluid out of the fluidic control device. A valve is associated with the control fluid path. The valve is movable between an open condition to allow fluid to flow along the control fluid path to effect the aforesaid control of the fluid flow out of the fluidic control device, and a closed condition to inhibit or prevent fluid flow along the control fluid path.

Abstract: An improved fluidic insert, that operates on a pressurized liquid flowing through the insert to generate a jet of liquid that flows from said insert and into the surrounding gaseous environment to form a spray of liquid droplets, includes: (a) a member having top, front and rear outer surfaces, (b) a fluidic circuit located within this top surface and having an inlet, an outlet and a channel whose floor and sidewalls connect the inlet and outlet, and a barrier located proximate the outlet that rises from the channel floor and is configured such that: (i) it divides the channel in the region of the barrier into what are herein denoted as two power nozzles, and (ii) each of these nozzles has a downstream portion that is configured so as to cause the liquid flowing from the nozzles to generate flow vortices behind the barrier that are swept out of the outlet in such a manner as to control the lateral rate of spread of liquid droplets from the insert.

Abstract: An object of the present invention is to provide an accumulator including a flow damper which is capable of performing a control so that a vortex may not be formed in a vortex chamber at the time of a large flow injection without requiring huge labors and fabrication costs. The flow damper is configured of a colliding jet controller (a bevel or a projection) for controlling a colliding jet composed of a jet from a large flow pipe and a jet from a small flow pipe flowing into a vortex chamber at the time of a large flow injection so that the colliding jet may proceed directly to an outlet without forming a vortex in the vortex chamber. The colliding jet controller is provided at a junction of an inner surface of the small flow pipe and an inner surface of the vortex chamber.

Abstract: A valve assembly (10) comprises a vortex chamber (14) with an axial outlet port (20), a main inlet port (16) for a fluid to be controlled, and a substantially tangential inlet port (25); the fluid enters through an inlet chamber (13) in which is a mechanical valve (26) movable so as to obstruct fluid flow into the vortex chamber (14). A duct (24) links the inlet chamber (13) to the tangential inlet port (25) of the vortex chamber. The position of the mechanical valve (26) affects the flow of fluid through the duct (24), so the vortex chamber (14) amplifies the effect of the mechanical valve. Further movement of the valve (26) closes off flow altogether (40). The assembly may include a weir (36) in the outlet, to separate gas and liquid phases.

Abstract: A valve system (10) controls the fluid flow between an inlet (12) and an outlet (14). The system (10) splits the flow into two parallel flow ducts (15, 16) and recombines the flows through opposed tangential inlets (18) and (19) of a fluidic vortex valve (20) which has an axial outlet (22). An adjustable valve (24) controls the flow through one of the parallel flow ducts (15), controlling the strength of the vortex generated within the vortex valve (20). Hence a small valve (24) can control and adjust the flows in both ducts (15 and 16).

Abstract: The torsion generator includes casing (1), in which at least one canal (2) is formed, whose inlet is located near to the casing (1) periphery. The longitudinal axis of the canal (2) passes on the logarithmical curve, wherein the mathematical sequence of the construction of the coordinates is different for each section of the curve. The outlet of the canal (2) communicates with the camera (3), formed inside the casing (1) and is connected with an outgoing pipeline (4). The inlet of the canal (2) is located tangentially, and the outlet—axially to the casing (1).

Abstract: A flow conditioning apparatus, a separation system which includes the flow conditioning apparatus and cooperating downstream separation equipment, and a method of using the system are described. The system separates liquid components of differing densities from a fluid mixture. The flow conditioning apparatus includes an inlet, an outlet, and a swirl chamber extending along a swirl axis. The inlet and outlet cooperate with the swirl chamber to create a swirling of a fluid mixture passing through the swirl chamber to ideally induce coalescence of liquid droplets. The inlet and the outlet typically direct fluid to flow in a circumferential direction relative to the swirl axis to create a helical flow. The flow of the fluid mixture through the apparatus encounters a minimum of fluid shear and associated droplet dispersion.

Abstract: A system for separating a liquid and a gas including a separation vessel (30) with an inlet (28) for a gas/liquid mixture. Outlets (40, 42) for the fluids are disposed at different heights in the vessel. The outlets are controlled by turn-up vortex amplifiers (fluidic valves TuVAs) that include a supply port (40, 42), a control port (36, 38) and an outlet port (48, 50). The control port is supplied from the vessel at an intermediate level between the outlets, so that a change of flow in the control port alters resistence to flow through the valve.

Abstract: A vortex valve flow control includes a housing defining a vortex chamber having an inlet for introducing a liquid into the vortex chamber in a manner to promote swirl and an outlet in one axial end of the vortex chamber. The peripheral wall of the of the vortex chamber, which is situated between the two end walls and surrounds the longitudinal axis of the vortex chamber, has a cylindrical cross-section. The distance between the end walls of the vortex chamber is no more larger than the diameter of the vortex chamber. A mounting device mounts a vortex valve flow control in a drainage gully whereby the outlet of the vortex valve communicates with the outlet from the gully. The mounting device includes a first element being securable to an end wall about the outlet opening and a second element mountable in or adjacent the outlet opening of the gully.

Abstract: A fluidic oscillator includes a member having an oscillation inducing chamber, at least one source of fluid under pressure, at least a pair of power nozzles connected to the at least one source of fluid under pressure for projecting at least a pair of fluid jets into the oscillation chamber, and at least one outlet from the oscillation chamber for issuing a pulsating or oscillating jet of fluid to a point of utilization or ambient. A common fluid manifold connected to said at least a pair of power nozzles. The shape of the power nozzle manifold forms one of the walls of the interaction or oscillation chamber. In some of the fluidic circuits, the length can be matched to fit existing housings. The power nozzle can have offsets which produce yaw angles in a liquid spray fan angle to the left or right depending on the direction desired.

Abstract: A flow control device for providing variable resistance to liquid flow through a flow passageway. A cylindrical housing communicates with the passageway. The housing has a sidewall, and an inlet and an outlet each disposed at two ends. A vortex generator is located within the housing, and has a base spaced from the inlet end of the housing and an annular flow guide radially spaced from the housing sidewall. The flow guide includes a number of slots. Liquid enters the housing through the inlet and is directed outside the vortex generator and through the slots. This creates a vortex flow path within the generator as the liquid flows to the housing outlet, so that as the pressure of the liquid at the inlet increases the flow factor of the device decreases to reduce the liquid flow rate through the device at higher inlet pressures.

Abstract: The device comprises a housing (1) with a curved side wall, said housing forming a vortex chamber and having an inlet opening (2) and an outlet opening (3), means (15) being provided at the inlet opening (2) for fastening a flow controlling element (7), and which device comprises a discharge pipe (5) connected with the outlet opening (3) of the vortex chamber. In the discharge pipe (5) a by-pass is provided which may be closed by means of a closing member (11) and which has a flow capacity so dimensioned that it does not at expected maximum liquid pressure substantially exceed the flow capacity of the vortex chamber.

Abstract: A biological fluid transport device comprises a cutwater at the junction of at least two blood flow paths. The cutwater is substantially straight, substantially vertical, or both. At least one of the fluid paths may be tubular, and in some embodiments all of the fluid paths are tubular. The shear sensitive fluid may be, without limitation, blood, blood-based combinations, cell culture media, cell suspensions, proteins, and microcapsule suspensions. The device may be part of an extracorporeal circuit (e.g., blood during heart-lung bypass procedures or blood processing), but it need not be. Preferred embodiments of the device include, without limitation, kinetic pumps, mass transfer devices, filters, reservoirs, and heat exchangers.

Abstract: An integral, semi-integral, or modular apparatus for inducing pressure drop between upstream and downstream of the apparatus for exhaustion of flue gas as through the exhaust piping of a cyclone separator, smoke stack of boilers, or other exhaust piping is presented. The invented 1st apparatus comprises 1st plenum confinement means having a 1st and 2nd CO(circular opening) on upper and lower side thereof respectively, a 1st circular OC(outer cylinder) inserted downward through the 1st CO and secured, and a 1st circular IC (inner cylinder) inserted upward through the 2nd CO and secured, whereby pressurized gas retained in the 1st plenum confinement means is injected to make a 1st annular jet through a 1st annular passage defined by outer surface of the 1st IC and inner surface of the 1st OC so that the flue gas flow inside of the 1st IC is easily sucked up toward downstream of the 1st apparatus due to the pressure drop caused by high kinetic energy of the vertical velocity component of the 1st annular jet.

Abstract: A vortex valve (40) includes a housing defining a votex chamber(44), the housing having an inlet (46) through which liquid may enter the vortex chamber (44)in a manner to promote swirl within the vortex chamber (44) and an outlet (30) at one axial end of the vortex chamber (44). A wall of the housing is provided with an opening which is normally closed by a closure, this closure (6) being operable between the closed position and an open position in which livid may enter the vortex chamber (44) by-passing the inlet (46). The vortex valve is free from a spring device capable of urging the closure (6) from the open position to the close position. The vortex valve (40) may be provided at the outlet of a gully and is useful in enabling a blockage, which may occur at the inlet (46) of the vortex valve (40), to be by-passed, thereby draining any accumulated liquid in the gully. The blockage may then be removed when the gully is relatively dry.

Abstract: A valve and method for adjusting the flow of a valve and for forming a turbulence in the flow. The flow is led tangentially from the inlet passage (2) into the space inside the valve body (1) in such a way that a turbulent flow is formed inside the valve body, outside the closure member. The flow volume is adjusted before the flow is brought into turbulence.

Abstract: A vortex chamber fluid pulser selectively produces pressure pulses in fluid flowing therethrough by the alternating insertion and retraction of a flow-disrupting tab into and out of an annular vortex chamber having an inlet and a pair of opposed axial outlets. Insertion of the tab disrupts the normally radial flow of fluid through the chamber and outlets causing the flow to become vortical; retraction of the tab causes a second pressure pulse as the flow returns to radial, sending a sequence of pressure pulses capable of carrying encoded signals to a transducer remotely located in the fluid.

Abstract: A fluid transfer system that combines a vortex diode with a jet ejector to transfer liquid from one tank to a second tank by a gas pressurization method having no moving mechanical parts in the fluid system. The vortex diode is a device that has a high resistance to flow in one direction and a low resistance to flow in the other.

Abstract: The invention is directed to a flow controlling device for a discharge system, such as a drainage system, having a first vortex chamber with an inlet and an outlet and a second bigger vortex chamber with a peripheral inlet and a central outlet axial in relation to a vortex in the second chamber. The second vortex chamber is connected at its inlet to the outlet of the first vortex chamber. The first vortex chamber is symmetrical with respect to a median plane perpendicular to a vortex axis (A), the direction of both the inlet and the outlet of this chamber being parallel with the median plane. The first vortex chamber is asymmetric with respect to a plane parallel with the inlet direction and perpendicular to the median plane. The vortex axis (A) of the first vortex chamber being perpendicular to a tangent of the second vortex chamber at the peripheral inlet and the ratio between the diameters of the first vortex chamber and the second vortex chamber is less than 0.43:1.

Abstract: A drilling bit having an irrigation system which uses an irrigating fluid. The bit comprises a hollow drill head 14 housing at least one fluidic oscillator 23, 23' which includes an accelerator nozzle 26, 26' supplied by said fluid and opening into a cavity 46, 46' in which a dividing element 34, 34' is mounted which is provided with a ridge 36, 36' located slightly downstream from the nozzle. Said dividing element defines in said cavity two passages 42, 44, 42', 44' towards which the fluid is alternately directed in pulsed jets. Said passages are linked respectively to two series of channels 16 to 22 which open onto the outer surface of the head 14 through a plurality of outlet openings 21 which are oriented so that the pulsed jets they give out are directed to selected portions of the head that need to be cleaned, cooled or lubricated.

Abstract: A miniature non-return valve comprises a circular recess with an inlet at its center, an annular groove coaxial with the recess and communicating with the recess at a number of points within the groove, and an outlet duct communicating with the groove. Fluid entering the inlet passes through the recess, the annular groove and the outlet duct substantially unimpeded, whereas fluid entering the outlet duct forms a vortex in the recess so that flow of that fluid to the inlet is inhibited. Control fluid may be fed into the recess to initiate or enhance formation of the vortex. The inlet and the circular recess may be provided in first and second substrates, respectively, and the annular groove and the outlet duct may be provided in a third substrate, all by a micromachining process, the substrates being bonded together in a stack. The substrates may be formed of silicon.

Abstract: A vortex flow regulator used in sewer catch basins to prevent overflow of the system from storm water runoff and to standardize the production of regulators. The hollow body of these flow regulators within a given range of regulators by the present construction have been found suitable for different size discharge orifice requirements. A flow regulator has been provided that is adapted to standardization of parts when built with only its discharge orifice needing change. The structure lends itself to mass production of flow regulators. Simple means for attachment of flow regulators within basin drain pipes has been provided.

Abstract: An electro-fluid converter for controlling a fluid actuating an adjusting element, such as a main control slider of a servo valve, comprises at least one displaceable throttle arranged in a fluid-rich circuit. The throttle has at least one throttle element with a central inlet passage and a plurality of flow-mechanical identical base elements arranged around the central inlet passage in a star-like manner. Each of the base elements includes a bipolar wall stream element connected with the inlet passage and a whirling chamber element connected with the wall stream element, each of the wall stream elements being thermoelectrically controllable.

Abstract: A vortex chamber valve for controlling fluid flow in a pipe system comprising a housing forming a vortex chamber having a curved sidewall, an inlet opening, and an outlet opening; an inlet valve disposed at an upstream side of the vortex chamber inlet opening having a main section and an edge section, wherein the edge section has a deflecting surface protruding away from the main section and towards the upstream side of the inlet valve, the edge section of the inlet valve covers a part of the inlet opening, so that, when upstream fluid levels rise at least up to the deflecting surface, the deflecting surface acts on the inflowing fluid to cause contraction in the inlet opening of the cross-sectional area of the inflowing fluid.

Abstract: A fluid friction controller that includes an outer member having a first friction control surface and an inner member having a second friction control surface. The control surfaces coact to define an elongated orifice that diverges from its entrance toward its exit. The length of the orifice is related to the angle of divergence so that the flow of a fluid passing therethrough remains attached to the control surfaces and the dynamic pressure in the flow does not exceed the static pressure at any point along the length of the orifice.

Abstract: The present invention provides a method for transferring agglomerative short fibers such as natural fibers, ceramic fibers or metals, by means of a Coanda spiral flow produced by feeding a pressurized fluid. In this fluid-transfer, short fibers can be smoothly transferred with an orientation while causing swelling and dissociation of agglomerates thereof. The defects inevitable in the conventional transfer under turbulent flow conditions such as adherence of fibers to the inner wall of the pipe, agglomeration and breakage of whiskers are completely solved. High-speed oriented-transfer at a speed of several to 100 m/second is possible by means of the Coanda spiral flow.