Abstract: A filter assembly comprises a filter head, a port, a fitting, and a diffuser. The port extends from a portion of the filter head and defines a channel for fluid to flow into or out of the filter head. The fitting first end is attachable to the port and the fitting second end is attachable to a filtration system component. The diffuser is positionable within the channel of the port and comprises an inner surface and an outer surface. The inner surface defines an inner conical hollow region that extends at a nonzero angle between the inner conical hollow region first end and the inner conical hollow region second end such that a first inner diameter of the diffuser at the inner conical hollow region first end is smaller than a second inner diameter of the diffuser at the inner conical hollow region second end.

Abstract: Aspirators for inflating devices such as (but not limited to) aircraft evacuation slides and rafts are detailed. Housings of the aspirators may be made of wound filaments of composite materials, reducing their weight as compared to conventional metal structures. Such actions as reconfiguring and repositioning jet nozzles within the housings also contribute to enhancing performance of the aspirators.

Abstract: A boiling water nuclear reactor (BWR) multi-stage jet pump mixer assembly according to a non-limiting embodiment of the present invention may include at least one nozzle disposed above a first throat structure which is arranged within a second throat structure. The multi-stage jet pump mixer assembly is configured such that when a drive flow is discharged from the nozzle into the first throat structure, a first suction stage occurs in that a first entrained flow is drawn into the first entrainment entrance and forms a mixed flow. The mixed flow exiting the first throat structure then induces a second entrained flow into the second entrainment entrance during a second suction stage. By employing a multi-stage approach, jet pump efficiency may be improved.

Abstract: A dielectric element barrier discharge pump for accelerating a fluid flow. In one embodiment the pump has a first dielectric layer having a first electrode embedded therein and a second dielectric layer having a second electrode embedded therein. The first and second dielectric layers are further supported apart from one another to form an air gap therebetween. A third electrode is disposed at least partially in the air gap upstream of the first and second electrodes, relative to a direction of flow of the fluid flow. A high voltage supplies a high voltage signal to the third electrode. The electrodes cooperate to generate opposing asymmetric plasma fields in the gap that create an induced air flow within the gap. The induced air flow operates to accelerate the fluid flow as the fluid flow moves through the gap.

Abstract: The automatically deformable nozzle regulator described herein is for use in a venturi pump. The automatically deformable nozzle regulator automatically adjusts its output area as needed to provide an increased suction force at a venturi pump inlet. The nozzle regulator includes an outer tubular cylinder and an inner tubular cylinder, concentrically arranged, and an inlet section join the two cylinders at one end. The nozzle regulator is constructed of a flexible material, such that when a constricting force is applied an output area of the nozzle regulator is decreased. Fluid backpressure at the nozzle regulator caused by obstructions at the pump inlet or the head at the outlet cause backpressure and the resultant constricting force. Because the nozzle is deformable, the output area is reduced, thereby increasing suction force at the inlet to remove the obstruction and increased velocity at the outlet to increase the head at the outlet.

Abstract: The invention relates to a device for guiding powdery fluidic media, in particular powder paint, including a receptacle which is provided with an inner chamber for the media which is to be guided, and from where the medium is suctioned via a connection channel which can be closed by a valve body. The connection channel and the valve body comprise, respectively, an upper end area. Said upper end areas are formed in such a manner that an annular Venturi nozzle is formed therebetween which is used as a pump. The valve body is inserted in a sealed manner in the end region of the connecting channel by means of a sealing section when in the closed position thereof and comprises a conveyor gas channel which can impinged upon by conveyor gas, through which the conveyor gas can be guided to the connection channel in the vicinity of the sealing section, essentially, in the direction of flow of the medium.

Abstract: An ejector tube (5) of an ejector pump has an inlet area (4), a mixing area (7) and an outlet end (8) via which the medium to be delivered exits the ejector tube (5). A conduit section (10) adjoins the outlet end (8), the conduit section (10) is connected to the outlet end (8) of the ejector tube (5) so as to form a single piece.

Abstract: A nozzle (41) is made of a sintered metal, and a pressure increasing portion (a mixing portion (42) and a diffuser (43)) is manufactured by plastic-forming a metal pipe. Accordingly, the nozzle (41) can be manufactured in a short time while high accuracy in machining is maintained. Thus, the cost of manufacturing an ejector (40) can be reduced.

Abstract: A nozzle (41) is made of a sintered metal, and a pressure increasing portion (a mixing portion (42) and a diffuser (43)) is manufactured by plastic-forming a metal pipe. Accordingly, the nozzle (41) can be manufactured in a short time while high accuracy in machining is maintained. Thus, the cost of manufacturing an ejector (40) can be reduced.

Abstract: A jet pump for a nuclear reactor includes a riser and an inlet mixer having a set of nozzles and a mixing section for receiving coolant flow from the nozzles and suction flow from an annular space between the reactor vessel and the shroud core. To minimize or eliminate electrostatic deposition of charged particulates carried by the coolant on interior wall surface of the inlet-mixer of the jet pump, and also to inhibit stress corrosion cracking, the interior wall surfaces of the nozzles and mixing section are coated with a ceramic oxide such as TiO2 and Ta2O5 to thicknesses of about 0.5-1.5 microns.

Abstract: A suction jet pump provided for the conveyance of fuel in a fuel tank has a separate nozzle insert with a nozzle duct. The nozzle insert can be produced both from plastic by the injection-molding method or from metal. By virtue of the smaller component size in the case of plastic or due to the choice of metal as material for the nozzle insert, the nozzle duct can be provided with a particularly small diameter. The suction jet pump has a particularly low propellant consumption.

Abstract: In the field of jet technology a nozzle of a liquid-gas jet apparatus for feed of an active liquid medium has a central channel and a peripheral annular channel and the total surface area of the outlet cross-section of the nozzle channels is determined from the following formula: S=S&mgr;(1+{square root over ((Skc/S&mgr;)3)}), where S—is the total surface area of the outlet cross-section of the nozzle; S&mgr;—is the surface area of the outlet cross-section of the central channel of the nozzle; and Skc—is the surface area of the minimal cross-section of the mixing chamber. A liquid-gas jet apparatus with the above-mentioned features has a higher efficiency and an improved reliability.

Abstract: The interior surface of a mixing chamber of a liquid-gas ejector in the field of jet technology is made of a material having a critical surface wetting tension which does not exceed 75 dyne/cm. A liquid-gas ejector realized in accordance with the invention exhibits an improved efficiency.

Abstract: The invention pertains to the field of jet technology and essentially relates to a nozzle for discharge of an ejecting liquid medium. The nozzle constitutes a collection of shaped channels. The central channel is coaxial to the mixing chamber, the other channels are uniformly allocated around and encircle the central channel. The total surface area of the outlet cross-section of the nozzle is determined from the following formula: S=S&mgr;[1+4{square root over ((SKC+L /S&mgr;+L ))}3], where S—the total cross-sectional area of the outlet section of the nozzle; S&mgr;—cross-sectional area of the outlet section of the nozzle's central channel; SKC—cross-sectional area of the minimal section of the mixing chamber. A liquid-gas jet apparatus with the above-mentioned characteristics has an improved operational reliability.

Abstract: A venturi type pumping device including a body having a tubular through bore between a bore inlet end and a bore outlet end, a restriction in the bore acting to produce a reduction in pressure downstream from the restriction, a delivery device for the delivery from a delivery outlet of a pressurized stream of liquid substantially axially aligned with the bore and upstream from the bore inlet end, a bore extension member which terminates upstream from and encloses the delivery outlet, and a mounting device provided on the body for sealing engagement of the bore extension member to the body.

Abstract: In a hydraulically powered pump for excavating and transporting slurries in hich it is immersed, the improvement of a gravel and cobble eductor including an expandable mixing section, comprising: a primary flow conduit that terminates in a nozzle that creates a water jet internal to a tubular mixing section of the pump when water pressure is applied from a primary supply flow; a tubular mixing section having a center line in alignment with the nozzle that creates a water jet; a mixing section/exit diffuser column that envelopes the flexible liner; and a secondary inlet conduit that forms an opening at a bas portion of the column and adjacent to the nozzle and water jet to receive water saturated gravel as a secondary flow that mixes with the primary flow inside of the mixing section to form a combined total flow that exits the mixing section and decelerates in the exit diffuser.

Abstract: A jet barrel and hose fitting insert are provided for a jet pump that supplies coating powder to a spray gun. The insert reduces the likelihood of impact fusion in the barrel and fitting. The insert comprises a cylindrical portion of small outside diameter in alignment with a cylindrical portion of large outside diameter with a longitudinal bore through both portions. The insert is retained in a hose fitting which fastens into the jet pump. The upstream end of the insert is positioned to receive the jet flow and to close a supplementary air chamber in the pump.

Abstract: A non-metallic diffuser for use in a gas flow amplifier. The non-metallic diffuser is molded from a conductive moldable resin into a truncated cone. Embedded within the outer circumferential periphery of the diffuser, located near the inlet port, are nuts for connecting the non-metallic diffuser to the housing. To allow for precise alignment of the diffuser to the housing, an extended key is projected outward from the inside edge of the inlet port of the diffuser. A handle is molded with the diffuser for ease of handling and transporting.

Abstract: A shallow well centrifugal pump having a casing forming a fluid flow cavity and having a fluid intake end with a threadless bore and a suction inlet communicating with the cavity through the bore, and a diffuser disposed in the casing cavity and spaced from the casing intake end. The diffuser has a threadless opening defined therein leading to an impeller. A venturi nozzle assembly is supported in the casing cavity between the casing intake end and the diffuser. The assembly has threadless opposite end portions disposed in slidably removable slip fitted relation within the casing intake end and diffuser in the respective threadless bore and opening therein. Endless sealing elements preferably in the form of O-rings are fitted about the respective threadless opposite end portions of the venturi nozzle assembly for providing hermetic seals between the assembly opposite end portions and the casing intake end and the diffuser.

Abstract: Compressed air driven vacuum pump assembly wherein the energy contained in compressed air is used to create a vacuum flow within a housing unit. Preferably, the modular housing unit includes a series of axially aligned air nozzles to provide a substantially straight air flow path through the housing unit. A series of axially aligned vacuum structures provide a vacuum flow path that is substantially parallel to the air flow path. The capacity of the vacuum pump is increased by elongating and enlarging the air and vacuum flow paths by means of the addition of modular housing units. The vacuum pump assembly includes an external muffler to dampen the air flow as it exits the housing unit.

Abstract: A jet pump system including a pump body having a nozzle carrier, a pump housing, and a cross-over housing connected in axially alignment. A flow discharge housing extends from the cross-over housing up to near the nozzle carrier. An injector nozzle having a cylindrical injection bore is axially directed into the discharge housing. A mixing tube is carried by the discharge housing which has a mixing bore in alignment with the injector bore. A funnel shaped flow intake throat merges through a mixing throat into the mixing bore. The cross-over housing is formed with large flow windows for discharge of the pumped mixed fluid through equally large windows, formed in a tubing seating sub into the annulus between the tubing and casing of a well. The assembly is equipped to be pumped down into operating position and pumped back to the earth's surface.

Abstract: A gas jet pump having a housing and a mixing nozzle holder which, in the area of their flange connection, form a mounting for a mixing nozzle. The mounting comprises on the one hand a clamping groove formed by both flanges in their parting plane, and on the other hand an annular groove in the periphery of the mixing nozzle and a ring made of elastic material located in both grooves. This secures both the axial position of the mixing nozzle relative to the housing and also the sealing.

Abstract: An improved multiple jet eductor assembly is described consisting of two parts:(1) a manifold ring with a pressurized water inlet and a plurality, preferably four, of radially-spaced, forwardly- and convergingly-directed jet nozzles, and(2) a tube having a bell end, near the bell end at a fixed axial distance therefrom a number of peripheral bosses radially disposed, equal in number to the plurality of nozzles, each boss containing a forwardly- and convergingly- directed porthole adapted to snugly receive a corresponding one of the jet nozzles.The eductor is assembled by forced simple coaxial translational motion of part 1 over the bell end of part 2, the nozzles engaging and entering the portholes with transitory snake-like flexure to reach a "home position" whereat the nozzles revert to their original, free of stress or distortion, molded, straight configuration, utilizing the unique memory property of viscoelastic materials, and securing part 1 to part 2 proximally in the "home position".

Abstract: A jet pump has a nozzle assembly within a pump body to direct power fluid into a venturi assembly for mixing with well fluid to be pumped. The nozzle assembly has a nozzle shell removably mounted in the pump body and a nozzle tip mounted securely to the nozzle shell. The nozzle tip has one end portion mounted within an opening of the nozzle shell and is secured to the nozzle shell by a bonding material.

Abstract: A jet pump has a nozzle for a power fluid, a Venturi for the power fluid and a well fluid, and a passage for the well fluid radially outside the Venturi and into the discharge of the nozzle. The power fluid aspirates the well fluid and the combined stream enters the Venturi. The Venturi is ceramic for erosion control. A shell sheaths the ceramic throughout its length and loads the ceramic compressively to provide a compressive preload on it. This preload opposes radial, outward acting stress in the Venturi arising from a greater fluid pressure within the Venturi than the fluid pressure outside it. The preload also produces a friction lock to keep the Venturi from sliding out of the shell because of an axial pressure differential.

Abstract: A removably insertable liner of elastically deformable material sized to be disposed within and in interfacially engaged relation with the inner surface of a rigid venturi element.