Abstract: A dual priming system connected with a centrifugal pump to evacuate gas therefrom includes a positive displacement pump fluidly connectable with the centrifugal pump and a venturi fluidly connectable with the centrifugal pump in parallel with the positive displacement pump. The dual priming system is operational in a first mode, wherein the positive displacement pump is inactive and the venturi is activated, and a second mode, wherein the positive displacement pump is activated and the venturi is activated.

Abstract: An anti-icing system for a gas turbine system includes multiple nozzles arranged in a grid and configured to inject fluid within an air intake system of the gas turbine system upstream of a filter to keep ice from forming on the filter. Each nozzle of the multiple nozzles includes multiple orifices for injecting the fluid via jets. The anti-icing system also includes a nozzle head coupled to a nozzle of the multiple nozzles. The nozzle head is disposed over the multiple orifices and is configured to rotate relative to the nozzle. The nozzle head includes at least one outlet for injecting the fluid from the jets via at least one jet.

Abstract: An inlet system for a gas turbine includes an inlet air duct; a silencer disposed in the inlet air duct, the silencer including a plurality of panels with spaces between the panels; and a conduit with orifices disposed to inject inlet bleed heat into each of the spaces. A method of conditioning inlet air for a gas turbine includes flowing air through spaces between panels of a silencer in an inlet air duct of the gas turbine, and injecting inlet bleed heat through orifices and into each of the spaces.

Abstract: A fuel tank for a motor vehicle, comprising at least one fuel delivery pump arranged in the fuel tank inside a surge tank provided therein, at least one suction jet pump fed from the feed of the fuel delivery pump for filling the surge tank or for draining at least one further volume arranged inside the fuel tank or formed by the fuel tank into the surge tank or into the volume of the fuel tank in which the surge tank is arranged. The fuel tank according to the invention is characterized in that at least one suction jet pump is connected, in that it takes fuel alternately, depending on the tank fill level, from several volumes arranged or formed inside the fuel tank or it can be operated intermittently depending on the tank fill level.

Abstract: A fuel pump module includes a reservoir and a jet pump. The reservoir includes first and second prime sockets and the jet pump includes a first tube defining a first nozzle and a second tube defining a second nozzle. The first tube has a lower end disposed in the first prime socket and an upper end configured to engage a first line routed to a first position outside of the reservoir in a fuel tank. The second tube has a lower end disposed in the second prime socket and an upper end configured to engage a second line routed to a second position outside of the reservoir in the fuel tank.

Abstract: A selectively operable vacuum source is disclosed. In one example, vacuum source supplies as much air to an engine as is drawn by the vacuum source from a vacuum reservoir. The approach may provide vacuum to a vehicle vacuum system efficiently and with less weight than other vacuum sources.

Abstract: A first and a second rotary pumps are provided in a first pump casing of a pump body, which is inserted into a cylindrical recessed portion of a housing 101. A first outlet port is opened at a first space formed between a bottom surface of the cylindrical recessed portion and an axial forward end surface of the first pump casing, so that discharge pressure of working fluid of the first pump is supplied to the first space. A second outlet port is opened at a second space formed between an axial backward end surface of the first pump casing and an axial forward end surface of a second pump casing, so that discharge pressure of working fluid of the second pump is supplied to the second space.

Abstract: A fuel supply unit includes a fuel reservoir (22) for holding fuel. A fuel pump (18) is in the reservoir for pumping fuel from the reservoir. A jet pump assembly (16) is within the reservoir for drawing fuel from a fuel tank into the reservoir. A seal structure (24) has a flange (28) with a living hinge (31). The seal structure is operatively coupled with a housing of the jet pump assembly and disposed between the housing and a portion of the reservoir, with a portion of the flange being pivoted about the living hinge such that the portion of the flange engages an interior surface of the reservoir, providing a seal between the housing of the jet pump assembly and the interior surface of the reservoir.

Abstract: A pump unit (12) includes a pump housing (14), a pump cover (16), and an impeller (18) between the pump housing and pump cover. The pump housing and pump cover define a first channel (32) and a second channel (34) each having an inlet and an outlet. The impeller has first vanes (36) cooperating with the first channel and second vanes (38) cooperating with the second channel. The outlet of the second channel is constructed and arranged to provide fuel to an engine upon rotation of the impeller. A jet pump (38) is fluidly connected with the outlet of the first channel such that as the impeller rotates, the jet pump causes fuel to be drawn into the reservoir (37). Connecting structure (44, 44?) fluidly connects the first and second channels such that upon rotation of the impeller, fuel in the second channel flows into the first channel to prime the first channel.

Abstract: An improved jet well pump includes a centrifugal pump assembly that is a stamping-welding one and a jet pump assembly. The centrifugal pump assembly includes a pump body and a pump cover, an impeller and a shaft that are disposed in the pump body, it also includes a motor arranged outside of the pump body. The impeller is installed on the shaft and driven by the motor. The jet pump assembly includes a jet pump body, a nozzle installed in the jet pump body and a throat member disposed on the upper end of the jet pump body. The centrifugal pump assembly and the jet pump assembly are communicated with each other by means of an inlet pipe and a return pipe. The upper ends of the inlet pipe and the return pipe are connected with an inlet and an outlet that are arranged on the axial surface of the pump body respectively, and the lower ends are connected with the throat member and the jet pump body respectively.

Abstract: A pump assembly comprises a centrifugal pump configured to pump a multiphase fluid, a suction conduit in fluid communication with the centrifugal pump, and a discharge conduit in fluid communication with the centrifugal pump. The pump further comprises an eductor comprising one or more motive nozzles disposed within the suction conduit. Wherein the one or more motive nozzles are configured to introduce a motive fluid into the suction conduit and toward the centrifugal pump along a suction direction roughly co-directional with the suction conduit toward the centrifugal pump. A method and a pump assembly for pumping a multiphase fluid are also presented.

Abstract: A seafloor pump assembly is installed within a caisson that has an upper end for receiving a flow of fluid containing gas and liquid. The pump assembly is enclosed within a shroud that has an upper end that seals around the pump assembly and a lower end that is below the motor and is open. An eduction tube has an upper end above the shroud within the upper portion of the caisson and a lower end in fluid communication with an interior portion of the shroud. The eduction tube causes gas that separates from the liquid and collects in the upper portion of the caisson to be drawn into the pump and mixed with the liquid as the liquid is being pumped.

Abstract: A subsea rotary gas separator system has a separator located adjacent the discharge of the pump for separating gas from the high pressure liquid stream exiting the pump. Some of the high pressure liquid is recycled back to the inlet of the pump to maintain a liquid-rich inlet stream for the pump.

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: A combination water pump/air compressor system for performing two separate functions with one unit by providing compressed air and water. The combination water pump/air compressor system includes a piping configuration including a main pipe capable of carrying a combined compressed air and water, and also including valve members being connected to the main pipe; and also including a water and air pressure accumulator assembly being connected to one of the valve members and being adapted to be connected to water and air sources for providing compressed water to the main pipe; and further includes an air injector being connected to the main pipe for creating air bubbles in the water in the main pipe; and also includes a water and air mixer assembly being connected to the main pipe for pressurizing the spongy liquid/gas mixture; and further includes a water and air separator assembly also being connected to the main pipe for separating compressed air from compressed water.

Abstract: A fuel supplying apparatus for use with a main fuel tank and an engine includes a fuel discharge pipe for supplying fuel to the engine, a sub-tank disposed in the main fuel tank, a fuel pump for pressurizing fuel and a jet pump. The jet pump includes a throat and a nozzle projecting into the throat from the bottom wall of the sub-tank. The throat has a fuel inlet opening disposed outside the sub-tank and a fuel discharge opening disposed in the sub-tank. When pressured fuel is injected into the inlet opening of the throat, the fuel in the main tank is sucked to the sub-tank.

Abstract: In a housing of a pump apparatus having a flow control valve to discharge a part of excess fluid in a deviated slanting way to a bypass pass 11, a pair of suction paths 19, 19? is formed opposite to end portions 119, 119? of the bypass path 11 to send operation fluid to suction ports of the pump apparatus. A dividing wall is equipped at opening portions of said pair of suction paths 19, 19? to distribute the operation fluid to each of suction paths 19, 19?. A cross sectional area of one of said opening portions in a side of a direction of said deviated slanting way is smaller than a cross sectional area of the other of said opening portions in an opposite side of the deviated slanting way to relatively restrict a flow of said operation fluid in said one of opening portions.

Abstract: Apparatus for delivering a water treatment chemical to a water intake in a water system is disclosed. The water system has a water inlet and a pump for withdrawing water from a natural body of water, such as an underground aquifer, a river, a lake or the like. In a water system that draws water from a body of water that is inhabited by zebra mussels, the apparatus is operable, when water is being drawn into the system, to deliver a zebra mussel control agent to the inlet of the system to eliminate zebra mussels, if present, from the water system and to prevent the infestation of the water system by zebra mussels. In a water system that draws water from an underground aquifer, the apparatus is operable, when the system is drawing water, to deliver a water treatment chemical to or near the water inlet for the system and to cause thorough mixing of the water treatment chemical with the water, before it reaches a reservoir in the system, whereby undesired impurities are controlled or removed from the water.

Abstract: A clog resistant pump for washwater employs two water flow circuits. The first powered by a conventional motor-driven pump uses filtered washwater and drives a jet-pump discharging unfiltered washwater from the washing machine. The intake or discharged water from the jet-pump is used to operate a self-cleaning filter providing water for the first circuit of the motor-driven pump. The position of the filter in the stream of wastewater and adjustment of the filter apertures in size and area reduce clogging yet allow sufficiently filtered water to permit a conventional high efficiency motor-driven pump to be used in the first stage.

Abstract: A siphon jet is attached to a dry hydrant which is in communication with a body of water to increase the flow of fluid to the dry hydrant and assist in overcoming the effects of atmospheric pressure and gravity in drawing the water. A pressurized fluid source can add fluid to the siphon assembly and this forces water from the body up the hydrant pipe. Also, the fluid from the pressurized fluid source can be added forward of a valve to fill the hydrant pipe which thus minimizes the duration of priming operations.

Abstract: In a fuel supply system for a vehicle, provided with a fuel tank having a bottom wall having an upward convex portion dividing an interior space of the fuel tank into a first chamber and a second chamber, a discharge rate of an electric fuel pump is controlled properly to reduce power consumption and fuel consumption. A fuel level monitoring means compares an output D.sub.m of a fuel meter unit 13 representing a level of fuel in the fuel tank with a set threshold fuel level L.sub.j, i.e., a minimum fuel level that requires the operation of a jet pump which pumps fuel from the second chamber into the first chamber. A power supply control means controls power supply to the fuel pump to supply power necessary for driving the fuel pump for operation at a discharge rate equal to the sum of the fuel consumption of the engine and a minimum required flow rate necessary for maintaining the performance of the fuel supply system when D.sub.m .gtoreq.L.sub.j or for operation at a maximum discharge rate when D.sub.

Abstract: An inlet air heating system for a gas turbine comprising a main air inlet; ducting leading from the main inlet to an inlet of the gas turbine; a manifold located adjacent the inlet for feeding intermediate temperature air into the ducting; a conduit connected to the inlet air manifold, the conduit having an ambient air inlet and connected to a compressor bleed air conduit, downstream of the ambient air inlet; and one or more eductors in the conduit through which the bleed air flows to entrain the ambient air into the conduit through the ambient air inlet and to mix the bleed air and ambient air for introduction into the ducting through the manifold.

Abstract: A self priming pump having a pump housing including a suction passage and a discharge passage. A pump chamber with an inlet and an outlet is also provided in the pump housing. A pump impeller is arranged in the pump chamber and has a suction opening opposed to the inlet of the pump chamber. A working fluid chamber is provided in the pump housing and is connected to the outlet of the pump chamber and to the discharge passage of the pump housing. A jet pump diffuser is provided directly upstream of the pump impeller. The jet pump diffuser has an inlet which is in communication with the suction passage of the pump housing and cooperates with the outlet of a jet pump drive nozzle within the suction passage. The inlet of the drive nozzle is connected to a supply passage which is connected to a supply passage which is connected to the working fluid chamber. A bypass line leads from the suction passage to the outlet of the diffuser while bypassing the inlet thereof.

Abstract: A pump (10) for providing water from a source to a remote location includes a casing (11) which receives the water through an inlet port (22) which is provided to the remote location through a discharge port (20). An impeller (30) in the casing (11) is rotated by a motor (23). A diffuser (35) is positioned adjacent to the impeller (30) and has a shoulder (42) facing the inlet port (22). A nozzle (44) is mounted in the inlet port (22) to receive low pressure water from the source which is transmitted to a venturi tube (43) positioned between the diffuser shoulder (42) and the front wall (16) of the casing (11). The venturi tube (43) directs water to the impeller (30) and diffuser (35) which provide water at high pressure, upon demand, through the discharge port (20) and also recirculates high pressure water in the casing (11) to the venturi tube (43) through openings (51) in the wall thereof.

Abstract: In an aircraft deicer comprising a reservoir and a pump connected to the reservoir through a first conduit, the pump operating to circulate a fluid contained within the reservoir throughout at least a portion of the deicer, the improvement comprising: a jet pump located in the first conduit between the reservoir and the pump for increasing the pressure of the fluid within the first conduit between the jet pump and the pump; the jet pump comprising a tubular body portion having an inlet end and a discharge end and a nozzle located within the body portion between the inlet end and the discharge end; and a second conduit extending from a discharge end of the pump to the nozzle; whereby fluid from the discharge end of the pump is injected into the fluid flowing from the reservoir through the jet pump.

Abstract: The well water removal and treatment system of the present invention includes a pumping and well water withdrawl loop consisting of an above ground pump, a pressurized water drive line from the pump outlet to a well water ejector, a water return line from the well water ejector to an aeration and precipitation tank, an inlet line from the aeration and precipitation tank to the pump and a venturi nozzle air mixing manifold fluidically connected between the high pressure drive water line and the lower pressure water delivery line to mix air into the water during the entire pump cycle. The water delivery line from the pumping and withdrawal loop has a flow control regulator therein that controls the water flow therethrough in proportion to the water pressure in the pumping and withdrawal loop above a preselected minimum control level.

Abstract: A hydraulic fluid pump for aircraft turbine engine fuel delivery systems comprises a housing having a pump drive shaft mounted for rotation therewithin. A centrifugal pump stage includes an impeller coupled to the drive shaft and having a circumferential array of radially extending passages with inlet ends adjacent to the shaft and outlet ends at the periphery of the impeller. An inducer stage includes a spiral inducer coupled to the shaft to rotate coaxially with the impeller and having an outlet end adjacent to the inlet end of the impeller passages. An injector stage includes a passage in the housing for feeding fluid to the inlet end of the inducer, and a circumferential array of nozzle orifices in the housing aligned with the injector passage and receiving fluid from a collection cavity that surrounds the periphery of the impeller.

Abstract: A jet pump having a rotatable venturi cartridge to permit any of several different sized venturi tubes to be aligned with a nozzle in the pump casing. A knob is provided on the pump casing to permit convenient rotation of the venturi cartridge. Printed indicia on the knob align with an indicator arrow to visually indicate the setting of the knob.

Abstract: A rotary hydraulic vane pump includes a rotor mounted within a housing, with a plurality of vanes individually slidably disposed in corresponding slots in the rotor periphery. A cam ring surrounds the rotor within the housing and has a radially inwardly facing vane track defining as least one arcuate fuel pressure cavity between the rotor and the cam ring. A fuel inlet in the housing includes a primary inlet port opening into the cavity at the leading circumferential edge of the cavity with respect to the direction of rotation of the rotor within the housing. A pump outlet includes an outlet port that opens into the cavity adjacent to the trailing circumferential edge of the cavity. A secondary inlet port opens into the cavity circumferentially between the primary inlet port and the outlet port, and is directly connected to the pump outlet port such that fluid, at outlet pressure is available at the secondary inlet port.

Abstract: An ejector in the fuel tank for transferring liquid fuel from the fuel tank to a fuel chamber in the fuel tank. The ejector comprises a housing with an inlet opening from the fuel tank laterally into the housing. An inlet channel for surplus engine fuel communicates into the ejector housing through a nozzle orifice outlet. An evacuation channel from the ejector housing has an inlet that is aligned with the nozzle orifice. The conicity of the ejector housing and of the inlet channel in the vicinity of the nozzle orifice is disclosed. The evacuation channel has an outlet that extends essentially tangentially into the free space inside the fuel chamber around the outside of a fuel pump therein.

Abstract: A vacuum device comprising a by-pass fan pump, a conduit connecting the inlet of the pump to a member in which pressure is to be reduced and a flow passage formation enabling a stream of air to enter the pump and to by-pass the member. In a preferred embodiment the inlet to the by-pass fan pump is connected to the outlet of a Venturi pump and the member is connected to the exhaust inlet of the Venturi pump. The device is directed particularly to the replacement of air by preserving gases in the packaging of foodstuffs.

Abstract: A jet pump macerator pump sewage handling system which provides a unique waste control system for use in mobile units such as passenger trains and ships in which multiple toilets are connected to a transfer manifold pipe which communicates with a non-clogging jet pump which is formed with a venturi and through which liquid material is driven by a macerator pump. Waste material from the toilets is drawn by the jet pump through the transfer manifold pipe and discharged into the retention tank. The macerator pump withdraws material from the retention tank, grinds it and discharges it back into the retention tank. The macerator pump has a self-cleaning feature in that it reverses and cleans itself whenever a loss in discharge pressure due to excessive solids loading is sensed. The transfer manifold pipe is virtually free from clogging due to the action of an air induction valve which keeps waste material in the manifold pipe moving without allowing it to accumulate.

Abstract: A fuel system bubble dissipation device wherein fuel is delivered through a fuel line from a fuel tank to an engine. The device includes an ejector having a casing with a fuel flow passage connected into the fuel line and a nozzle extending into said fuel flow passage. The nozzle is supplied with pressurized fuel to induce a higher pressure in the fuel flowing through the ejector. A bubble accumulation chamber is associated with the fuel line and the ejector to provide a reservoir for fuel for passage to the ejector and hold an air bubble separated from and above the fuel and a bubble evacuation passage connects the upper end of the bubble accumulation chamber to the fuel flow passage of the ejector whereby air and vapor can be drawn from the upper end of the bubble accumulation chamber and mixed with fuel flowing through the ejector. The bubble evacuation passage is of a size to control the rate at which air and vapor are drawn from the bubble accumulation chamber.

Abstract: A pump assembly for limited production wells comprises an electric motor driven centrifugal pump having a controlled amount of recirculation through a jet pump. The recirculated fluid is the power fluid for the jet pump, which aspirates production fluid. The combined output of the jet pump is discharged to the centrifugal pump inlet. An electrically actuated valve in the recirculation path controls the amount of recirculation, permitting low well flow rates to be compensated for by high recirculation rates, and variation of the valve position is accomplished from the well head by the imposition of a DC signal on the AC power line for the pump motor.

Abstract: A centrifugal pump for pumping fuel to a gas turbine engine is equipped with a start injector and a run injector. The pump has a single fuel output nozzle from which fuel goes to the engine. It also has several other nozzles from which fuel goes to the start injector. The flow through the injector draws fuel from the engine fuel supply and raises the pressure on a pump inlet, thereby raising the pressure in the pump outlet nozzle. The run injector receives bypass fuel flow from the engine and uses it to draw in engine fuel which is supplied together with the bypass fuel to a pump inlet nozzle. The run injector increases the fuel pressure in that inlet. The start injector operates during starting and the run injector is inoperative at that time. When the engine speed reaches a minimum level for sustained engine operation, the start injector is inoperative and the run injector is operating.

Abstract: A centrifugal pump for producing a vacuum, the pump recirculating fluid through a vacuum chamber into which a vacuum line opens, the flow of water across the chamber carrying air or gas therewith to produce the required vacuum.

Abstract: This pitot pump is provided with pressure balancing for minimizing thrust loads on its bearings. The pump has a housing containing a rotatable casing mounted on a shaft. A fixed pitot tube is mounted in the casing for withdrawing pressurized fluid as the casing rotates and discharging the fluid through an axial outlet passage extending through one end wall of the casing. Fluid is introduced to the casing through the same end wall by way of an annular inlet passage coaxial with the outlet passage. The fluid flows from this inlet passage to the interior of the casing through a plurality of radiating passages in the end wall of the casing. When such a pump is used with a pressurized inlet fluid, an axial thrust on the casing bearings would result if it were not for the thrust balancing means. This comprises an axial balancing chamber between a portion of the end wall opposite the fluid inlet and a portion of the pitot tube.

Abstract: In a gas turbine engine an auxiliary airflow is provided to power accessories. This auxiliary airflow is obtained from a bleed aperture which is constructed immediately downstream of a diffuser vane in a cusp which is formed in the trailing edge of the vane to provide inertial separation. This high energy air from the diffuser is used as the primary airflow in an ejector to draw ambient air into the auxiliary airflow to lower the temperature of the bleed air. The ejector is constructed to automatically adjust the amount of ambient air according to the energy of the bleed airflow by means of a piston actuated spike mounted for sliding movement in the primary nozzle. The spike varies the volume of flow through the primary nozzle according to the pressure exerted by the airflow on the piston.

Abstract: An inlet line connected to the inlet of a hydraulic pump includes a jet pump having a Venturi nozzle though which the aspired liquid is passed, and into which a coaxial jet of liquid under higher pressure is introduced to raise, by jet-pump action, the pressure of the liquid at the pump inlet.