Abstract: A hydraulic pressure control apparatus for an automatic transmission may include an oil tank, a first hydraulic pump fluid-connected with the oil tank for generating a first hydraulic pressure, a second hydraulic pump fluid-connected with the first hydraulic pump for generating a second hydraulic pressure higher than the first pressure, a torque converter and a lubrication portion fluid-connected to a first low pressure supply line to receive the first hydraulic pressure, a first high pressure supply line fluid-connected to the second hydraulic pump and to a powertrain, a switching valve bifurcated from the first low pressure supply line and fluid-connected to the first hydraulic pump and both the torque converter and the lubrication portion, and a feedback line fluid-connected to the first high pressure supply line to the switching valve so as to selectively open or close the switching valve according to the second hydraulic pressure.

Abstract: A cyclonic elevator tube comprising a manifold which supplies fluid under pressure via an annular transition ring with multiple, circumferentially spaced jet orifices. These orifices are set at inwardly and circumferentially directed compound angles for ejecting vortex jets of pressurized fluid through the elevator, to ultimately cause transportation of fluid material through the tubes. This apparatus comprises: a cylindrical chamber; a plurality of helically shaped venturi tubes spaced around the internal circumference of the chamber; a manifold connected to the inlet ends of the venturi tubes; and a high pressure gas supply connected to the manifold. The helix can be right or left handed and preferably the venturi tubes extend for less than one turn of the helix. The angle that the tangent of the helix makes with the longitudinal axis of the chamber is between 1° and 89°. The internal circumference of the chamber may be larger at the inlet end than at the outlet end.

Abstract: A Pump consisting of a pressure vessel (50), an inlet nozzle (51), an ejector nozzle (52) by which vacuum and pressure are applied, and an outlet nozzle (53). The inlet and outlet nozzles (51, 52) are selectively closed by interconnected knife gate valves, operated in tandem by a pneumatic cylinder whereby when one valve is closed, the other is open an vice-versa. An ejector valve located in the ejector nozzle (52) alternately creates vacuum and generate air flow through the vessel (50). The air from the ejector is introduced into the discharge line after closure of the outlet valve.

Abstract: In order to improve a reciprocating piston compressor for a refrigerant circuit, comprising a crankcase, in which a collecting chamber for lubricant is arranged, a cylinder housing, in which at least one reciprocating piston is movable in an oscillating manner, a valve plate which closes the cylinder housing and in which at least one inlet valve and one outlet valve are arranged, and a cylinder head, in which a suction gas duct which runs to the inlet valve and a compressed gas duct which leads away from the outlet valve are provided, in such a manner that excessive accumulations of lubricant can be avoided, it is suggested that a lubricant suction conduit be provided which has an inlet opening associated with the collecting chamber and an outlet opening associated with the suction gas duct and that the outlet opening be located in an area of the suction gas duct, in which a static pressure, which is lower than a static pressure in the collecting chamber for lubricant, prevails at least temporarily.

Abstract: An ejector pump (100) includes a chamber having a gas mixing portion (108) and a diffuser portion (112). An inlet (10S) conveys a gas stream into the gas mixing portion, and an outlet (114) conveys the gas stream from the diffuser portion. To provide a motive fluid for the pump, a stream of plasma is ejected through a nozzle (116) into the gas mixing portion (108) of the chamber. Reactive species contained within the plasma stream react with a component of the gas stream to provide simultaneous pumping and abatement of the gas stream.

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 jet suction pump (9) has a pump fluid nozzle (13) with a round nozzle opening, a mixing tube (14), a suction opening, a suction line (12) arranged thereon and a canister (8), in which at least a part of the mixing tube (14) is arranged. The base (16) of the canister (8) has a non-planar embodiment (17-19).

Abstract: Vessels (10, 11, 12 and 13) are associated with an inlet manifold (14) passing to inlets (16), each controlled by a knifegate valve (17). The lower ends of the pots (10) and (12), and pots (11) and (13), pass material through respective outlet knifegate valves (22) to respective first (23) and second (24) delivery lines. The respective knifegate valves (17) and outlet knifegate valves (22) of pots (10) and (11) on the one hand and pots (12) and (13) on the other, are operable by respective common pneumatic actuators (25). Each pot has an ejector assembly (26) having an upper chamber (28), an air injector nozzle (30), and an accelerator tube (31) to create the venturi function. An air cycling valve (32) transitions the upper chamber (28) between a depressurized space and a pressurized space. The accelerator tube (31) exhausts to a delivery line (23 or 24). Ejector assembly (26) air is supplied via air control valve (35).

Abstract: A system for pumping multiphase fluids includes a phase separator (14), a gas-gas jet pump (30) and a liquid pump (36). The phase separator (14) receives a LP multiphase fluid and separates a LP gas phase and a LP liquid phase from the LP multiphase fluid. The gas-gas jet pump (30) receives the LP gas phase from the phase separator (14) and a HP gas supply from a sustainable gas source, and has an outlet providing outlet gas at a pressure higher than that of the LP gas phase. The liquid pump (36) receives the LP liquid phase from the phase separator (14), and has an outlet providing outlet liquid at a pressure higher than that of the LP liquid phase.

Abstract: A compressing diaphragm pump having automatic air expelling and pressure abnormal-preventing features for spray use has a hollow tubular air discharge assembly having a plunger body and compressed spring as well as an air passage pierced at the wall of the water exit port and an air discharge orifice pierced of the central top surface of the air discharge assembly for connecting with the plunger body. When air is mixed within the pressurized water, the resilient force of the compressed spring is bigger than the water pressure of the pressurized water. This allows the air mixed in the pressurized water to get into the air passage and pass the plunger opening of the plunger body via through pore, and is dispelled out of the upper hood via the air discharge orifice of the air discharge assembly.

Abstract: The present disclosure relates to a vehicle transmission with jet pump. The jet pump includes a hydraulic control system that has a nozzle fitted between a first and second housing. The nozzle is separable from the first and second housing. The hydraulic control system is configured to produce a jet stream of fluid through a center section of the nozzle.

Abstract: A fuel system that supplies fuel to an engine of a vehicle. The fuel system includes a pump that pumps fuel and a controller that selectively changes operation of the pump between an electronic returnless fuel system mode and a mechanical returnless fuel system mode. In the electronic returnless fuel system mode, the outlet of the pump is varied, and in the mechanical returnless fuel system mode, output of the pump is maintained approximately constant.

Abstract: A water jet type pump is part of a system for generating an ultrahigh vacuum. The pump includes a pump chamber through which an ionic fluid flows at high velocity. The chamber has a first fluid feed for the fluid, the first feed ending in a nozzle with a nozzle opening, and a fluid discharge. A second feed of the pump chamber is connected to a high pressure chamber to be evacuated. Gas is suctioned out of the high vacuum chamber through the second feed by way of the flowing fluid jet, which is used to discharge the gas out of the pump chamber.

Abstract: A method and apparatus for cleaning accumulated silt from the floor of a percolation basin are provided. An underwater terrain vehicle (UTV) moves along the basin floor and carries a series of blades that cut and lift the accumulated silt. An eductor driven vacuum head also carried by the UTV vacuums fragmented silt and transports the entrained fragmented silt through a vacuum hose into a location where the silt particles are separated from the water in which they are entrained. The UTV carries a first sonar for continuously scanning the basin floor and which is utilized to guide the UTV. A second sonar is placed in the basin in a known location and continuously scans and continuously monitors the location of the UTV on the basin floor. An operator remotely guides the UTV from an onshore location.

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 extraction tube has an upper end above the shroud within the upper portion of the caisson and a lower end connected to a jet pump. The extraction tube causes gas that separates from the liquid and collects in the upper portion of the caisson to be drawn into the jet pump and mixed with the liquid as the liquid is being pumped.

Abstract: The present invention removes contaminants from well water without creating the problem of large volumes of waste liquid disposal. It uses double-cone devices as pressure amplifiers which due to their lack of moving parts avoid the risk of additional contamination of the well and provide a prolonged lifetime. For toxic contaminants, a periodic purging of the concentrated contaminants is required. In the case of (sea) salt contamination, there is no waste brine to be continuously handled at all and the system may be run without interruption over an extended period. In this case, the brine is dumped into the well simply by periodically stopping the plant. The brine pours out of the double-cone unit(s) and due to its higher density, sinks down in the well without disturbing the operation of the purification plant.

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 fuel supply system is provided for delivering fuel from a tank to an engine of a motor vehicle through a fuel line. The system is provided with a pressure relief valve to divert fuel from the fuel line during engine shut down conditions when fuel flow to the engine is not desired. The pressure relief valve has a fuel outlet that is provided with backpressure during engine operation. The backpressure enables the pressure relief valve to be set at a lower level because the backpressure is added to set point pressure to determine opening of the pressure relief valve. Lowering the set point of the pressure relief valve allows fuel to be diverted from the engine at a lower fuel line pressure. In one embodiment backpressure is provided by fluid communication from a jet pump supplying fuel from the fuel tank to a fuel system reservoir.

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: The fuel supply apparatus according to the invention is improved in a simple manner in that it is provided with short fuel lines. According to the invention, the drive line of the suction jet pumps is connected to a pressure line downstream of the fuel supply pump and has at least one check valve or a siphon.

Abstract: The filter housing has a filter outlet portion with a central filter outlet passage. The outlet portion includes a terminal end portion defining a filter nozzle. The filter nozzle forms a nozzle passage between the filter nozzle and the pump housing. The nozzle passage communicates with an annular recess formed in the filter outlet portion. The annular recess receives return bypassed hydraulic fluid from a regulator valve for distribution into an inlet stream of fluid flowing through the filter outlet passage. The inlet stream velocity is increased which increases the pressure at the pump inlet. The increased pressure at the pump inlet allows the pump to operate at higher speeds without cavitation.

Abstract: A fuel feed apparatus connects with an injector and a reservoir tank. The reservoir tank is in upstream of the injector for accumulating fuel for the injector. A fuel pump press-feeds fuel in a fuel tank toward the reservoir tank in accordance with pressure in the reservoir tank. A press-feed pipe defines a fuel passage from the fuel pump to the reservoir tank. A branch pipe is provided to the press-feed pipe. The branch pipe defines a return passage that branches from the fuel passage. Fuel discharged from the fuel pump returns into the fuel tank through the return passage. A throttle unit is provided to the branch pipe for reducing a sectional area of the return passage. A relief valve is provided to the branch pipe for communicating the return passage when pressure in the return passage becomes equal to or greater than relief pressure.

Abstract: A fuel supply unit 10 includes a fuel reservoir 22 for holding fuel, a fuel pump 18 within the reservoir for pumping fuel from the reservoir, a jet pump assembly 16 within the reservoir for drawing fuel from a fuel tank into the reservoir, and a gasket 24 operatively coupled with a portion of the jet pump assembly and disposed between the portion of the jet pump assembly and an interior surface of the reservoir so as to decouple the jet pump assembly from the reservoir.

Abstract: A rotary vane pump for delivering a fluid and which has a housing which accommodates a rotatable delivery device (1) and which includes a feed channel (13) for receiving the fluid from a tank or the like. The feed channel communicates with a jet chamber (15) which in turn communicates via one or more suction channels (20) to at least two suction chambers which communicate with the intake region of the pump. An injector device (14) injects a pressurized fluid into the jet chamber to entrain and advance the fluid entering from the feed channel (13), and means are provided for influencing the flow of the fluid so as to achieve essentially the same volume flow into the two suction chambers.

Abstract: A system and method for reducing the collection of debris in a fluid pumping system. The system and method may be used in pools, spas, or other applications in which fluids are circulated through a fluid-containing vessel. The system includes a first pump that circulates fluid. A screen is coupled to the input of the first pump and acts to prevent debris from reaching the first pump. A second pump may be used to remove debris from the screen.

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 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: An apparatus and method are provided for removing accumulated underwater debris from a reservoir for a recirculating water system, such as used for a golf course sprinkler system. An eductor is provided which is driven by a high pressure water pump. The high pressure creates a vacuum which is utilized to actuate a vacuum line. The vacuum line is moved to and fro in the reservoir to entrain the debris from the reservoir in water and to carry the entrained debris to the eductor. The entrained debris is discharged from the eductor into a separator having a permeable membrane which traps the debris and allows the water to return to the reservoir. Various separators are provided. The eductor includes an adjustably mounted nozzle to adapt to different sized debris being removed from the reservoir.

Abstract: A hydraulic flow return system of a transmission pump in which primary and bypass flows of hydraulic fluid are returned to primary and bypass flow channels, respectively, of a booster nozzle situated adjacent the rotating group at the inlet of the pump for delivery a boosted flow of high pressure fluid to the pump as a result of the incoming bypass flow being passed through a flow restrictor before being recombined with the primary flow, the system is improved by incorporating a bypass valve which senses the back pressure in the incoming bypass flow and operates to open an auxiliary bypass channel in the event that the back pressure exceeds a predetermined control value in order to divert a fraction of the bypass flow around the flow restrictor for delivery to the pump until such time as the back pressure falls below the control value.

Abstract: A method and system for dynamically determining a vapor pressure of a fluid passing through a pumping system by diverting a portion of the fluid from the pumping system into a chamber, isolating the diverted fluid from the pumping system, evacuating the chamber and measuring the vapor pressure of the isolated fluid. In another aspect of the invention, a temperature compensation device is included in the chamber to alter the chamber fluid temperature to insure that the chamber fluid temperature is substantially the same as the fluid in the pumping system.

Abstract: A gas compression system including a body of fluid and a down pipe. A first end of the down pipe is positioned to receive a fluid from a source above a surface of the body of fluid and a second end is positioned at a lower level of the body of fluid. A gas inlet is coupled to the down pipe, above the surface of the body of fluid for mixing a gas to be compressed with the fluid from the source to form a mixture. A chamber is positioned at the lower level of the body of fluid and coupled to the second end of the down pipe for receiving the mixture and collecting a compressed gas therefrom. A conduit is coupled to the chamber for transferring the compressed gas therefrom.

Abstract: A rotary vane pump for delivering a fluid and which has a housing which accommodates a rotatable delivery device (1) and which includes a feed channel (13) for receiving the fluid from a tank or the like. The feed channel communicates with a jet chamber (15) which in turn communicates via one or more suction channels (20) to at least two suction chambers which communicate with the intake region of the pump. An injector device (14) injects a pressurized fluid into the jet chamber to entrain and advance the fluid entering from the feed channel (13), and means are provided for influencing the flow of the fluid so as to achieve essentially the same volume flow into the two suction chambers.

Abstract: A pump assembly is provided that includes a gerotor pump and a manifold. An aspirating member is positioned between a pump inlet cavity in the manifold and a fluid reservoir. Fluid flow generated by operation of the pump is diverted by a flow control valve and accelerates as it passes between the aspirating member and the manifold. The resulting decrease in static pressure draws the fluid out of the reservoir where it mixes with the higher velocity fluid. As the combined fluid is slowed, the static pressure increases to “supercharge” the inlet cavity to improve the inlet fill and reduce cavitation. An inlet port in the gerotor pump corresponds to the inlet cavity in the manifold. The timing and geometry of an input port is optimized to prevent noise inducing pressure spikes while maintaining sufficient back pressure in the pump chambers to collapse entrapped vapor bubbles in the fluid.

Abstract: A sliding vane pump comprising a rotor housing having a pumping chamber, a rotor in the pumping chamber having a plurality of radially disposed slots, and a plurality of sliding vanes disposed in the slots configured to extend to follow an inner wall of said pumping chamber.

Abstract: A hydraulic pump comprises a housing, a primary discharge outlet, an auxiliary discharge outlet, a flow control valve, a first fluid passageway within the housing passing fluid from a first discharge port to the primary discharge outlet, a second fluid passageway within the housing passing fluid from a second discharge port to a common port of the flow control valve, a third fluid passageway within the housing passing fluid from a first switched port of the flow control valve to the auxiliary discharge outlet, and a fourth fluid passageway within the housing connecting a second switched port of the flow control valve to the primary discharge outlet. The primary discharge outlet and the auxiliary discharge outlet are each adapted for connection with external lines of a hydraulic system.

Abstract: Any hydraulic flow return system of a transmission pump in which primary and bypass flows of hydraulic fluid are returned to primary and bypass flow channels, respectively, of a booster nozzle situated adjacent the rotating group at the inlet of the pump for delivery a boosted flow of high pressure fluid to the pump is a result of the incoming bypass flow being passed through a flow restrictor before being recombined with the primary flow, the system is improved by incorporating a bypass valve which senses the back pressure in the incoming bypass flow and operates to open an auxiliary bypass channel in the event that the back pressure exceeds a predetermined control value in order to divert a fraction of the bypass flow around the flow restrictor for delivery to the pump until such time as the back pressure falls below the control value.

Abstract: A pump assembly is provided that includes a gerotor pump and a manifold. An aspirating member is positioned between a pump inlet cavity in the manifold and a fluid reservoir. Fluid flow generated by operation of the pump is diverted by a flow control valve and accelerates as it passes between the aspirating member and the manifold. The resulting decrease in static pressure draws the fluid out of the reservoir where it mixes with the higher velocity fluid. As the combined fluid is slowed, the static pressure increases to “supercharge” the inlet cavity to improve the inlet fill and reduce cavitation. An inlet port in the gerotor pump corresponds to the inlet cavity in the manifold. The timing and geometry of an input port is optimized to prevent noise inducing pressure spikes while maintaining sufficient back pressure in the pump chambers to collapse entrapped vapor bubbles in the fluid.

Abstract: A rotary vane pump for delivering a fluid, having a delivery device (1) accommodated in a casing (2), with the casing (2) being closed on the one side by a casing cover (3), and on the other side by a bearing flange (4). A drive shaft (11) extends through the bearing flange (4), the delivery device (1), and optionally the casing (2), and is supported in a passageway formed in the bearing flange (4) and optionally in the casing cover (3). Also, between the delivery device (1) and the inside wall of the bearing flange (4), a side plate (16) is arranged, which supports itself on the inside wall, and centers the delivery device (1) in the casing (2). The side plate (16) is centered on the side facing the bearing flange (4) by a centering collar which extends into the passageway for the drive shaft (11).

Abstract: The present invention provides a device for drawing-off fuel from a motor vehicle tank, the device comprising a drawing-off pump and a fine filter placed upstream from the pump, wherein the drawing-off pump is a brush-less pump.

Abstract: A sliding vane pump comprising a rotor housing having a pumping chamber, a rotor in the pumping chamber having a plurality of radially disposed slots, and a plurality of sliding vanes disposed in the slots configured to extend to follow an inner wall of said pumping chamber.

Abstract: A fluid flow promoter for increasing and accelerating the flow of fluids through channels, and useful in marine propulsion and aeration of liquids includes 1) an outer shell including an inlet end wall, an outlet end wall, and a solid truncated wall, 2) a fluid inlet generally centrally located in the inlet end wall, 3) an inner truncated cone with an inlet corresponding to the outer shell inlet and an outlet corresponding to the outer shell outlet, disposed within the outer shell and comprising end and side walls defining a space between the outer shell and the inner cone, the end and side walls of the inner truncated cone being perforated to permit fluid flow therethrough, and 4) a plurality of secondary fluid inlets disposed in the end or side wall of the outer shell. The apparatus is also useful in increasing the thrust of rockets and other jet exhaust devices, and for moving light gases such as helium in modular helium reactors.

Abstract: In a fuel feed unit (3) for a motor vehicle, a suction jet pump (6) provided for filling a baffle (2) of a fuel tank (1) is manufactured in one piece with a holding part (4) for a fuel pump (5). The holding part (4) is of pot-shaped design for receiving the fuel pump (5) and carries a fuel filter (7) on a vertical wall (8). Fuel thereby passes to the suction jet pump (6) immediately after the fuel pump (5) has been started up.

Abstract: The introduced process essentially includes feeding a gas-liquid flow from a liquid-gas ejector into a hydrodynamic device for adjusting the flow speed, where the gas-liquid flow is exposed to an expansion and hence a subsonic flow regime is provided. The introduced process is implemented by a pumping-ejector unit furnished with a hydrodynamic device for adjusting the flow speed. An inlet of this device is connected to an outlet of a liquid-gas ejector, an outlet of the device is connected to a separator. The hydrodynamic device defines a profiled canal diverging in the flow direction or a collection of divergent canals arranged one after another in series. The described operating process and related pumping-ejector unit ensure a more reliable and efficient operation.

Abstract: The invention relates to the field of jet technology. Essentially a pumping-ejector unit comprises a separator and a liquid-gas ejector. Gas inlet of the ejector is connected to a source of evacuated medium, outlet of the ejector is connected to the separator and nozzle's inlet of the ejector is connected to the discharge side of a pump. The pumping-ejector unit is furnished with a jet pump. Outlet of the jet pump is connected to the suction side of the pump, nozzle's inlet of the jet pump is connected to the discharge side of the pump, evacuated medium inlet of the jet pump is connected to the separator. There is another variant of embodiment of the unit, wherein the nozzle's inlet of the jet pump is connected to a source of ejecting medium. The described pumping-ejector unit exhibits an increased reliability and effectiveness and it has a wider control range of operation modes.

Abstract: One embodiment of the invention encompasses a fluid vacuum system for vacuuming-up discharge fluid from a fluid source without applying a vacuum to the fluid source. The system comprises a discharge conduit, a vacuum source, and a vacuum-breaker. The discharge conduit is in fluid communication with the fluid source. And, the vacuum-breaker connects the discharge conduit to the vacuum source such that the vacuum source applies a vacuum to the discharge fluid without applying a vacuum to the fluid source. Select embodiments are optimized for use with dialysis machines in dialysis clinics. A closed system, preferably a vacuum system, is provided for disposal of noxious odors and fluids.

Abstract: A fuel pump module constructed to be disposed in a vehicle fuel tank has a primary fuel pump with a fuel inlet disposed adjacent the bottom of the module and a fuel outlet which delivers pressurized fuel to an engine and also a jet pump disposed in a recess of the module and closely adjacent the bottom of the fuel tank to draw fuel into the module from the fuel tank in response to fuel flow through the jet pump. Disposing the jet pump in the recess of the module and closely adjacent to the bottom of the fuel tank enables the jet pump to draw substantially all of the fuel from the fuel tank into the module to ensure that the primary fuel pump can deliver an adequate supply of fuel to the engine even during extremely low fuel level conditions in the fuel tank.

Abstract: An apparatus for drawing off fuel for a motor vehicle tank, the apparatus being of the type comprising a secondary reserve (20) suitable for being placed in a main tank (10), main pump (30) suitable for drawing fuel from the reserve (20), and auxiliary pump (40) of the jet pump type suitable for drawing fuel from the main tank and for transferring it to the secondary reserve (20). The body (41) of the jet pump (40) is angularly positioned to be vertical, with its outlet facing upwards.

Abstract: A method and device for quick pressure relief in a hydrogen-cooled generator system. The hydrogen-cooled generator system at least includes a first and second housing part and a hydrogen seal that separates the first housing part from the interior of the second housing part. In the normal state, the first housing part contains a hydrogen atmosphere at overpressure that is separated from the interior of the second housing part by the hydrogen seal. The quick pressure relief method includes the steps of lowering the pressure of the overpressure hydrogen in the first housing part through a quick discharge line upon failure of the hydrogen seal, and exhausting gas from the interior of the second housing part through a bleed line that is connected to the quick discharge line.

Abstract: A gas flow director for exhausting gases from chambers, and useful in the operation of operation of gas turbines, jet engines and rockets, as well as vacuum pumps and gas compressors. The gas flow director includes 1) an outer truncated cone including a closed larger end wall, a generally open smaller end comprising a gas outlet, and a solid truncated wall, 2) a gas inlet generally centrally located in the larger end, and 3) an inner truncated cone disposed within the outer truncated cone and corresponding generally in shape to the outer truncated cone, and including end and side walls generally parallel to the end and side walls, respectively, of the outer truncated cone to define a space therebetween. The end and side walls of the inner truncated cone are perforated to permit gas flow therethrough. The gas flow director also includes 4) a plurality of secondary gas inlets disposed in the side wall of the outer truncated cone, adjacent the end wall, or in the larger end wall adjacent the side wall.

Abstract: Difficulties in adapting centrifugal pumps for use as fuel pumps for turbine powered aircraft are avoided in a system including a centrifugal volute pump (22) on a common shaft (18) with a regenerative pump (24). A pressure responsive throttling valve (46) is connected to the inlet (50) of the regenerative pump (24) so as to cause the regenerative pump (24) to provide fuel at a desired, substantially constant pressure while a check valve (80) is connected to the outlet (72) of the centrifugal volute pump (22) to allow flow from the volute (72) but not the reverse. The outlet side of the check valve (80) can also be selectively connected to the outlet (84) of the regenerative pump (24) so that when the pumps are rotating relatively slowly, the regenerative pump (24) will pump fuel at the desired, substantially constant pressure and, as rotational speed increases, the check valve (80) will open when the centrifugal volute pump (22) is pumping fuel at or about the desired substantially constant pressure.