Abstract: A vapor compression system (200; 400; 600; 700; 800; 900; 1000) comprises a plurality of valves (260, 262, 264; 260) controllable to define a first mode flowpath and a second mode flowpath. The first mode flowpath is sequentially through: a compressor (22); a first heat exchanger (30); a first nozzle (228; 624); and a separator (48), and then branching into: a first branch returning to the compressor; and a second branch passing through an expansion device (70) and a second heat exchanger (64) to the rejoin the flowpath between the first heat exchanger and the separator. The second mode flowpath is sequentially through: the compressor; the second heat exchanger; a second nozzle (248; 625); and the separator, and then branching into: a first branch returning to the compressor; and a second branch passing through the expansion device and first heat exchanger to the rejoin the flowpath between the first heat exchanger and the separator.

Abstract: An LCM placement device for placement of an LCM onto a test bed in a test cell is provided. The LCM placement device minimizes or prevents damage and degradation of the test bed during placement of the LCM. The device includes a funnel-shaped feeder, a cylindrical shaft, an inverted funnel-shaped dispenser, and an energy-absorbing disc coupled to the inverted funnel-shaped dispenser by legs. Processes for placement of an LCM onto a test bed in a test cell are also provided.

Abstract: An aspirator assembly for an inflatable device may have an inner housing disposed about an axis with an outlet formed through the inner housing. An outer housing may also be disposed about the axis with a surface of the outer housing covering the outlet. The outer housing may be translatable relative to the inner housing to expose the outlet in response to a gas pressure within the aspirator assembly being above a threshold.

Abstract: An ejector, or arrangement having the ejector, has a compact structure requiring little installation space, permitting a sufficient pumping action, and, in case of an error, the error can be unambiguously detected and diagnosed as the source of the problem, which ejector for insertion into a receptacle, has a base element with a throat that fluid-connects a first opening and a second opening to each other, whereby the throat has a narrowest part that is fluid-connected to an associated third opening, and whereby the throat widens, at least in sections, towards the first and second openings, wherein, as a functional component, the ejector can be inserted into and/or positioned in a mating receptacle in the correct orientation so as to fulfill its function as a jet pump in an arrangement.

Abstract: A jet and venturi tube arrangement is provided for a fuel delivery module. The arrangement includes a venturi tube 14 having an opening 15, an internal wall 24 and a central axis C. A jet 10? is provided that has an exit 22. The jet 10? is constructed and arranged to spray a stream 12 of fuel from the exit 22 into the opening 15 of the venturi tube 14 substantially along the central axis C. The jet 10? has surface features 20, near the exit, constructed and arranged to divert a portion 12? of the stream 12 of fuel so that the portion 12? contacts the internal wall 24 of the venturi tube 14 thereby limiting back flow of fuel through the opening of the venturi tube.

Abstract: A fast reactor 1 includes: a reactor vessel 7 accommodating therein a core 2 and a primary coolant 21; a core support 13 supporting the core 2 from below; and a bulkhead 6 disposed on the core support 13, the bulkhead 6 extending upward and surrounding the core 2 from a lateral side. Between an inner surface of the reactor vessel 7 and the bulkhead 6, there is disposed an intermediate heat exchanger 15 configured to cool the primary coolant 21, and an electromagnetic pump 14 configured to pressurize the cooled primary coolant 21. A neutron shield 8 supported by an upper supporting plate 29 from above is disposed below the electromagnetic pump 14. The upper supporting plate 29 has an opening 29a. Between an outlet 14b of the electromagnetic pump 14 and the upper supporting plate 29, there is disposed a coolant guide mechanism 17 configured to guide the pressurized primary coolant 21 from the electromagnetic pump 14 to the neutron shield through the opening 29a of the upper supporting plate 29.

Abstract: A pneumatic vacuum generator includes at least one venturi nozzle having a flow cross section which deviates for a circularity. The venturi nozzle may thus have a substantial rectangular or non-circular flow cross section like for example an oval flow cross section or an elliptical flow cross section. At least two plates are disposed in parallel relationship and joined in sandwich construction, with one of the plates constructed to accommodate the venturi nozzle.

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: Disclosed herein is a vacuum ejector pump. The pump is operated by compressed air which is supplied to or discharged from the pump at high speed, thus creating negative pressure in an outer surrounding space. The ejector pump includes a frame having an air inlet pipe, a disc, and an air outlet pipe which are sequentially arranged to be spaced apart from each other. The parts are coupled into a single structure via a spacer. A nozzle is mounted to pass through the center of the disc, and a flexible valve member is mounted to the spacer A nozzle body is accommodated in a cylindrical casing having a hole at a position corresponding to the valve member, and defines a chamber inside the spacer. A locking structure is provided on the casing and the nozzle body so as to prevent the casing, which accommodates the nozzle body, from rotating.

Abstract: Low pressure off gases such as from dry gas seals may be recompressed to a higher pressure using multiple tandem supersonic ejectors in which upstream ejectors operate at a higher nozzle exit Mach number than down stream ejectors and all ejectors are operated at exit Mach numbers greater than 1.

Abstract: An infusion status indicator disposed in the medical infusion line includes a housing with an opening through which the status of the infusion may be determined. A flexible membrane is located at the opening to indicate the status of fluid in the cavity. A recessed flexible membrane indicates insufficient flow of medical fluid into the cavity from the fluid supply, a level flexible membrane indicates correct flow of fluid through the indicator, and a concave flexible membrane indicates an insufficient flow of medical fluid out of the cavity, possibly indicating an occlusion of the fluid line downstream of the indicator. Check valves may be included upstream and downstream of the cavity so that a bolus of fluid may be forced out of the cavity to the patient by pressing the flexible membrane into the cavity.

Abstract: According to the invention, a vacuum pump is disclosed comprising a screw-rotor pump having a compression section (8) and an expansion section (7), and wherein a discharge (10) from the compression section communicates with at least one ejector (1) for discharge of compressed gas through the ejector, and wherein the expansion section (7) is connectable via a first valve means (5), to a drive-gas source (P) for operating the screw,-rotor pump and the ejector in parallel. Also, a method for providing sub-pressure to an industrial process is disclosed wherein at least one ejector (1) is used initially to reduce the pressure to a predetermined lower level, from where the pressure is further reduced by means of a screw-rotor pump (7, 8) that is arranged to operate through, and in parallel with the ejector.

Abstract: An ejector which is operative for generating a sub-pressure, has a rotationally symmetric ejector body arranged to be mounted in the mouth of a seat having a circular internal section, whereby in a mounted position an inlet end of the ejector body is inserted in the seat and an outlet end thereof projects outside the mouth of the seat. The ejector body has on its exterior a region of defined axial length with a radius that is growing towards the inlet end, the region being situated between inlet and outlet ends, as well as a shoulder having an abutment surface facing the region, the shoulder being arranged on the ejector body near the outlet end thereof. The ejector is arranged for supporting a cylindrical clamping sleeve for a limited axial displacement about the ejector body, between the shoulder and the region.

Abstract: A vapor jet vacuum pump includes a housing having an inlet port and a foreline conduit, a vapor jet assembly within the housing, a vapor source for supplying a vapor to the vapor jet assembly, and at least one ejector stage. The ejector stage includes an ejector nozzle mounted in the foreline conduit and a fluid inlet located external to the housing and coupled by an ejector conduit to the ejector nozzle. The fluid inlet may be an air inlet for drawing in air at atmospheric pressure. The ejector stage may be driven by a backing pump coupled to the foreline conduit.

Abstract: A pneumatic driving device and the associated method for micro fluids, wherein the pneumatic driving device for micro fluids is constructed by connecting a fluid pipe with a structure that is formed by two gas stream inlets, a gas stream fender, a gas stream flow path and a gas stream outlet. The suction, exclusion and stagnation for the micro fluids inside the fluid pipes can be accomplished by adjusting the flow rates of the gas streams into the device at the two gas stream inlets. In the invention several pneumatic driving devices are connected to form a single recursive pneumatic driving device by the concept of recursion, and the micro fluids inside several fluid pipes can be controlled to mix or to separate through the recursive pneumatic driving device by adjusting the flow rates of the gas streams into the device at different gas stream inlets.

Abstract: The invention concerns a device for compressing gas using thermal energy. In a subsonic embodiment the heat gas passes through a convergent pipe C1 where it is provided with operating velocity, a convergent pipe C2 where it is simultaneously maintained at high speed and cooled by evaporation of liquid sprayed by nozzles R with adjustable position distributed in C2. In a supersonic embodiment. the gas reaches sonic velocity at the throat of C2 and supersonic velocity in a divergent DG, then compressed in a convergent CG1 and simultaneously cooled by evaporation of sprayed liquid. In both embodiments, the gas is finally compressed in a subsonic divergent DG1. Pipes with variable geometry enable to modify the cross-sections of the throats of the device.

Abstract: An fluid handling device (10) having an elongate tubular body which defines a through bore (20) between an inlet end (13) and an outlet end (14) of the body. The device also includes first and second annular chambers (30,38), each of which extends substantially concentrically around the bore (20), the first chamber (30) being in communication with the bore (20) via a first set of passages (48) spaced circumferentially around the bore (20), and the second chamber (38) being in communication with the bore (20) via a second set of passages (49) spaced circumferentially around the bore (20). The passages (48,49) of each set communicate with the bore (20) at a respective axial location (45,46) intermediate the ends (13,14) of the bore (20), with the location (46) for the second set (49) being between the location (45) for the first set (48) and the outlet end (14) of the housing, and each passage of each set (48,49) having an opening into the bore (20) which faces towards the outlet end (14) of the body.

Abstract: A supersonic device including an elongated mixer-diffuser housing having first and second drive nozzles arranged axially and tandemly therein. The first and second drives nozzles are arranged in first and second cylinder parts, respectively, of the mixer-diffuser housing. A conical first mixer part is disposed between the first and second cylinder parts and defines a first mixing zone therein. The second drive nozzle further comprises a generally conical displacement body, preferably configured as a supersonic cone or wedge, which extends into the conical first mixer part.

Abstract: An apparatus for drawing off dust-laden gases, especially in the art of dental technique, has a ring channel (15) which can be loaded with compressed air. The airstream which is provided by a compressed-air nozzle (26) performs an arcuate movement in the ring channel (15), whereby dust-laden gases are drawn in through an annular slit (22) and conveyed to an outlet channel (13). The apparatus is suitable for drawing off gases from containers. The apparatus serves for drawing off dust-laden air which is released when mixing solid substances, for example dental investment material, in a container (10).

Abstract: A jet pipe comprises a housing having a suction inlet for the medium to be taken in and an outlet, a conical tubular portion following the suction inlet towards the outlet and a section adjacent to the suction inlet provided with discharge openings arranged peripherally around the tubular interior for a discharge of a highly pressurized medium. When such jet pipes are used for processing contaminated soil, the wear of the individual parts of the jet pipe causes high expenses and non-productive time. In order to reduce wear and non-productive time, the section comprising the outlet openings is formed as a replaceable ring.

Abstract: This invention relates generally to pumps, and more particularly, to a new concept in pumps where the principle of operation is based on the change in momentum of a curved, fluid jet curtain, with the pump itself containing no moving parts.

Abstract: A jet pump is provided for pumping a secondary fluid through a duct by injecting a primary fluid into the duct in the form of sheet-like jets lying in a plane parallel to the direction of flow of secondary fluid through the duct.

Abstract: An axially symmetric jet difuser ejector having attached primary injection nozzles without protruding outside the ejecting structure and being spaced around the ejector inlet. The primary nozzles have been specially designed to optimize the conveyance of fluids therethrough and the flow of ingested fluids therearound. The diffuser jet nozzle is provided with a strainer to prevent clogging of the narrow diffuser jet slots.

Abstract: A process and device for compressing a fluid by releasing a working fluid that includes an initial pocket wherein the working fluid circulates, a second pocket in which the fluid to be compressed circulates, a third pocket wherein the mixture of the working fluid circulates along with the fluid to be compressed, with the mixture being supplied from a mixing pocket that is connected to the third pocket as well as to the first and second pockets. The mixing pocket has a ring-like configuration and the first and second pockets are connected to the mixing pocket through passages that are adapted to introduce the working fluid and fluid to be compressed substantially tangentially. The device is adaptable to compress or pump an effluent which is of an oil type nature.

Abstract: An arrangement for elevating liquids with the aid of wind has an upper delivery pipe with an upper end connected to a pumping-out device, a lower supply pipe introducable into a water source and having an upper end connected with a constriction of a Venturi pipe, and a downwardly convex pipe connecting an outlet diffuser of the Venturi pipe with the lower end of the delivery pipe.

Abstract: A Jet pump for transporting fluid by drawing in the fluid through utilization of a jet stream under high pressure includes a path for transporting the fluid, a plurality of nozzles surrounding the path for supplying high pressure fluid and a plurality of outlets surrounding the nozzles for supplying low pressure fluid.

Abstract: There is disclosed a unitary vacuum transducer or pump capable of obtaining a high degree of vacuum using standard shop compressed air fed to a single inlet in the transducer from a single source of compressed air, each venturi tube having compressed air supply means associated with said inlet and terminating in a jet-producing nozzle. The transducer comprises two or more venturi tubes arranged in series with the entrance section of one venturi tube being connected to the exit section of another smaller venturi tube the entrance section of which is connected to the exit section of a yet smaller venturi tube or to the orifice of a vessel containing air or other gas to be rarefied.

Abstract: A low cost liquid proportioning and mixing device of high accuracy dispensing a solution or mixture involving volume, pressure and flow rates and including a multi-stage jet proportioning and mixing device in which any variation occurring in the designed ratio of the mixture is confined essentially to the first proportioning stage operating at a low solution ratio below 1 to 5 with the pressure of free flowing solute entering the zone of confluence for each stage and the pressure of the mixture leaving the zone of confluence being essentially equal and the outflow area of any final discharge opening is possibly less but not greater than the flow area of the conduit opening from the zone of confluence of the final stage with or without a conduit used between them, the final proportion of the solution being the multiplicand of the solution proportion of the individual stages.

Abstract: Two circular rows of through channels in the walls of the pump mixing chamber serve to admit the conveying fluid into said chamber. The axes of the channels in one row are inclined to the cross-sectional plane of the mixing chamber and to the plane passing through its longitudinal axis, thus forming a vortex stage. The axes of the channels in the other row are inclined only to the cross-sectional plane of the mixing chamber, thus forming an injecting stage. The distance between the stages is selected so as to arrange the points of intersection of the channel axes of the vortex stage and the point of intersection of the channel axes of the injecting stage in one and the same plane which is perpendicular to the longitudinal axis of the mixing chamber.This pump can be used in devices for sucking in, conveying and placing loose materials, for lifting slurry in rotary drilling of wells with the well face cleaned by the indirect flushing method and in the devices for the preparation of clayey suspension.

Abstract: A method and system for increasing cooling of an enclosure is provided. The component enclosure includes one or more sidewalls defining a volume, the sidewalls are configured to substantially surround a heat generating component positioned within the volume. The component enclosure further includes a synthetic jet assembly positioned adjacent at least one of the sidewalls. The synthetic jet assembly includes at least one synthetic jet ejector having a jet port. The jet port is aligned at least one of perpendicularly, parallelly, and obliquely with a surface of the at least one sidewall. The synthetic jet assembly is configured to direct a jet of fluid through the port at least one of substantially parallel to the surface, perpendicularly onto the surface, and obliquely toward the surface.