Abstract: A pump control system, comprising: a motor (12) configured to drive a pump (14); a pressure relief valve (22) in fluid communication with the pump (14); a torque control valve (32) connected to a swashplate of the pump (14) and in fluid communication with the pressure relief valve (22); a swashplate angle sensor (36) connected to the swashplate (34); and a computer (40) connected to the swashplate angle sensor (36) and the pressure relief valve (22) wherein the computer (40) controls the pressure relief valve (22) based upon swashplate displacement to achieve maximum system pressure. The corresponding method of controlling is also disclosed.

Abstract: The invention relates to a combustion chamber for a turbomachine. The combustion chamber comprises at least one spark plug, at least one fuel injector of a first type of injector that is located facing the spark plug, and at least one fuel injector of a second type. Each fuel injector comprises a mobile sealing member that is configured to open when the fuel pressure exceeds an opening threshold. The opening threshold of the mobile sealing member of the injector of the first type is strictly less than the opening threshold of the mobile sealing member of the injector of the second type.

Abstract: An apparatus, methods and systems for multi-configuration, multi-stage gas-liquid separation are presented. A production string is fitted with a shroud of size similar to the collars. Gaseous fluids intake into the upper portion of the shroud into a first chamber. Tubes or pipes collect the fluids for transport into the lower portion of a receiving chamber. Another plurality of tubes collect fluids in the portion of the receiving chamber above the first set for transport into a third chamber. Separated gases are collected and disposed. One or more receiving chambers are used. A final set of tubes or pipes transport the processed fluid to the bottom portion of a final chamber for delivery into the production string. The final chamber may be fitted with material-packed cylinders for further gas separation prior to delivery. The material-packed cylinders may be used alone as separators, or in combination with the receiving chambers.

Abstract: An adapter for a pool cleaning system is provided. The adapter includes a base member having a top and a bottom surface. The adapter also includes six upper ports coupled to the top surface of the base member, each upper port including an upper aperture extending through the upper port and through the base member. The adapter further includes five lower ports coupled to the bottom surface of the base member, each lower port including a lower aperture extending through the lower port and through the base member. In some embodiments, four of lower ports are in fluid communication four of the upper ports and one of the lower ports is in fluid communication with two of the upper ports.

Abstract: A gas turbine health monitoring fuel system including a fuel splitter, a first and second fuel nozzle, a first and second fuel pump, and a common drive coupled to the first and second fuel pumps. The first and second fuel pumps are downstream from the fuel splitter. The first fuel nozzle is fluidly coupled to the first fuel pump by a first fuel stream. The second fuel nozzle is fluidly coupled to the second fuel pump by a second fuel stream. The common drive is configured to drive the first and second fuel pumps at a same speed. The controller system is configured to determine a first fuel pressure in the first fuel stream, determine a second fuel pressure in the second fuel stream, and identify a difference between the first and second fuel pressures.

Abstract: Disclosed is a hydraulic brake system provided with a high pressure accumulator that reduces a pressure pulsation of brake oil being discharged through operation of a pump. The high pressure accumulator includes a damping member that is provided in a bore communicating with an inlet port and an outlet port of the high pressure accumulator respectively allowing brake oil to be introduced and discharged therethrough, and is provided with a bypass flow passage connecting the inlet port to the outlet port, and a reinforcing member installed at the damping member to improve durability of the damping member.

Abstract: A hydraulic circuit includes: a priority valve including a first position and a second position where: the first position includes a first fluid passage and a fixed bypass orifice connected to the first fluid passage; the second position includes a second fluid passage and a variable bypass orifice connected to the second fluid passage. The hydraulic circuit further includes: a first fluid line fluidly connecting the priority valve and a first machine component; a second fluid line fluidly connecting the priority valve and a second machine component; a check valve placed between the priority valve and the second machine component and fluidly connecting the priority valve and the second machine component; an oil passage on the priority valve fluidly connected to one or more machine components other than the first and second machine components; one or more actuators connected to the priority valve; and a control valve communicatively connected to the one or more actuators connected to the priority valve.

Abstract: A check valve for an aircraft galley plumbing system comprises a valve body including an inlet for a potable water supply line, and first and second outlet ports leading to a distribution manifold. In a preferred embodiment, quick disconnects that include reverse flow inhibitors seal the valve's output ports. A vertical channel extends through the valve body for draining water through the valve, which is coupled to a pressure line connection port that exerts pressure from the aircraft's pressure system. A piston reciprocating across the vertical channel and biased by a spring is in fluid communication with the pressure line connection port, such that when a water pressure is introduced from a water pressure line to the pressure line connection port of sufficient to collapse said spring, the piston blocks said channel, and when the water pressure is insufficient to collapse said spring then the piston retracts to open said channel, allowing fluid to pass thereinthrough.

Abstract: A construction equipment machine has a lower frame and an upper frame rotatably connected, the machine having at least one hydraulic pilot circuit comprising a primary hydraulic pilot line running from the upper frame to the lower frame through a rotary joint for controlling the operation of at least one hydraulic device located on the lower frame, including: a pressure regulating system capable of setting in the pilot circuit a pilot pressure having a value; a hydraulic pressure controlled selecting system which is located on the lower frame and is fed by the primary hydraulic pilot line, at least two independent secondary pilot lines located downstream of the pressure controlled selecting system, and wherein said hydraulic pressure controlled selecting system is capable of selectively and independently supply or not supply pressurized fluid to the independent secondary pilot lines, responsive to the value of the pilot pressure.

Abstract: A variable oil pump capable of rapidly ejecting a required amount of working fluid using an oil pressure of the working fluid generated according to an engine RPM, and improving a lubrication effect to improve engine efficiency. Also described is a variable oil pump, in which a gap is provided between a plunger and a cylinder to easily operate the plunger using an oil pressure output from an oil pump, enabling more rapid supply of a required amount of oil using an oil pressure varied according to variation in an engine RPM. A variable oil pump is described in which the plunger is perpendicularly operated with respect to a flow direction of the working fluid, such that the plunger can be operated in a direction in which a pressure of the working fluid is applied to operate the oil pump.

Abstract: A fuel supply system for a gas turbine engine has a first pump for delivering fuel to a first use on a gas turbine engine, and a second pump for delivering fuel to a second use on the gas turbine engine. A valve allows flow from the first pump to be delivered to the first use, but also routes some flow from the first pump to supplement fuel flow from the second pump until a pressure downstream of the second pump increases. The valve then allows flow from the second pump to flow to the first use to supplement the flow from the first pump.

Abstract: A flow meter trap primer valve assembly for regulating flow includes an inlet for receiving water from a supply, a check valve mounted within an adaptor having an elongate bore forming a jet, and the check valve includes a piston mounted within a cartridge. A biasing element normally urges the piston against a trap seat.

Abstract: An adjustable economizer valve is disclosed that does not overlap the pressure build function, which allows a single valve to be used for both high and low gas use applications. The valve will economize well and reduces system pressure when needed in low use applications. The valve also provides maximum pressure build capacity when needed in high gas use applications. The valve seals off the pressure build outlet from the economizer connection with a seal around a pusher post disposed in the valve body. The pusher post has an internal flow path that is sealed by a floating device that can create a seal from diaphragm pressure and can open when diaphragm pressure is removed. In exemplary, non-limiting, embodiments, the floating device can be a ball or a disc plate.

Abstract: The invention supplies a quantity Q of gas while dividing at flow rate ratio Q1/Q2 from a gas supply facility equipped with a flow controller. A total quantity Q=Q1+Q2 of gas is supplied into a chamber at flow rate Q1 and Q2 through shower plates fixed to ends of branch supply lines by providing open/close valves with a plurality of branch supply lines GL1 and GL2, respectively, to supply the specified quantity of gas from the gas supply facility, and by utilizing bypass line BL1 on the downstream side of the open/close valve OV1 and branched from GL1 ,bypass line BL2 on the downstream side of the open/close valve OV2 and branched from GL2 ,pressure type division quantity controller connected to the bypass line BL1 and the bypass line BL2 ,a sensor measuring pressure inside branch supply line GL1 ,and another sensor measuring pressure inside branch supply line GL2.

Abstract: Disclosed is an automatic pressure reducing valve. A body includes a hollow portion, an inlet portion and an outlet portion for flow of a fluid and has an internal space. A cylinder is installed inside the hollow portion and has at least two holes formed in its wall. An piston is movable along the inner side of the cylinder and adjusts opening rate of the holes according to a fluid pressure difference between an inlet portion and an outlet portion.

Abstract: A fuel divider system includes a housing assembly and a flow passage network having an inlet, a primary outlet, and a secondary outlet. A fuel divider piston is slidably disposed within the housing assembly and movable between a flow biasing position and a flow equalizing position. A control chamber is fluidly coupled to the flow passage network and fluidly communicates with the piston. An inlet chamber, at least partially defined by the piston and the housing assembly, is fluidly coupled to the inlet. At least one channel is provided through the piston and configured to cooperate with the flow passage network to port the FD control chamber to: (i) the fuel pressure at the secondary outlet when the FD piston is in the flow biasing position, and (ii) the fuel pressure within the inlet chamber when the FD piston is in the flow equalizing position.

Abstract: An apparatus includes a valve housing having an inlet port, a first chamber with a first outlet port, and a second chamber with a second outlet port. A first valve opens between the inlet port and the first chamber under a first level of pneumatic pressure at the inlet port. A second valve opens between the first chamber and the second chamber under a second, greater level of pneumatic pressure in the first chamber. A third valve opens between the second chamber and the first chamber under a third level of pneumatic pressure in the second chamber, with the third level being less than the first level.

Abstract: A pressurizing and pressure regulating valve is provided. In one embodiment, the pressurizing and pressure regulating valve includes a sleeve, a first flow passage formed through the sleeve, a second flow passage formed through the sleeve, and a piston slidably disposed in the sleeve. The piston is configured to move between: (i) a pressurizing position wherein the piston impedes fluid flow through the first flow passage, and (ii) a pressure limiting position wherein the piston impedes fluid flow through the second flow passage. A sensing chamber is fluidly coupled to the first flow passage and configured to receive pressurized fluid therefrom. The piston is configured to move from the pressurizing position to the pressure limiting position when the pressure within the sensing chamber exceeds a predetermined minimum pressure.

Abstract: A valve seat 20 is arranged between the supply circuit 8 and a downstream circuit 18. A valve body 21 blocks a fluid flow between the supply circuit 8 and the downstream circuit 18 by contacting the valve seat 20. The valve body 21 connects the supply circuit 8 to the downstream circuit 18 for supplying the fluid to the downstream circuit 18 by separating from the valve seat 20. A through hole 24 extends through the valve body 21 and thus defines a part of the supply circuit 8. The through hole 24 is defined in such a manner that the fluid that has flowed from the through hole 24 proceeds between the valve seat 20 and the valve body 21 and is thus supplied to the downstream circuit 18. The valve body 21 is formed in such a manner that a pressure receiving area at an upstream side of the through hole 24 is smaller than a pressure receiving area at a downstream side of the through hole 24.

Abstract: A diaphragm controlled bypass valve includes a diaphragm valve portion and a needle valve portion. The diaphragm valve portion regulates pressurized gas supplied from a pump to determine whether or not to open or close a needle valve. The needle valve portion includes an inlet port, an outlet port and a flow pathway defined between the inlet and outlet ports. A needle pin is disposed within the flow pathway and is coupled to a diaphragm positioned within the diaphragm valve portion. When the diaphragm is displaced in response to changes in pressure, the needle valve pin is likewise displaced which opens and closes the flow pathway.

Abstract: A flow divider includes a spool for distributing fluid from a supply flow path to priority and surplus flow paths. First and second surplus restrictions vary flow rate in accordance with the movement of the spool and restrict the flow rate to the surplus flow path respectively from first and second supply passages. The second surplus restriction is formed to restrict the flow rate in at least two steps. The spool includes a cross-sectional area changing portion located at a position corresponding to the second surplus restriction. Therefore, the circuit structure is prevented from becoming complicated and the fluid force acting as a spool urging force is suppressed.

Abstract: A hydraulic system including a control valve and a steering control assembly. The steering control assembly includes a steering control unit and a priority flow divider contained in a single unitary casing. The steering control assembly is attached adjacently with and directly to the control valve by means of an interface that fluidly connects the control valve with the steering control assembly.

Abstract: A method and apparatus for cooling a clutch of a motor vehicle by controlling a valve through which a coolant circuit is coupled with a pump circuit. The valve includes a control piston that is movable at least to actuate a connection between the coolant circuit and the pump circuit.

Abstract: A method and apparatus for changing the speed of a drill bit down hole in a fluid-actuated motor, including a positive displacement motor and a hydraulic motor, is disclosed. The apparatus comprises a bypass valve installed in the motor for controlling flow through and around the power section of the motor. When closed, the bypass valve forces all fluid to flow through the power section of the motor, imparting maximum speed to the drill bit. When opened, a portion of the fluid flow is allowed to flow around the power section of the motor, thereby reducing the speed of the drill bit. The bypass valve may be opened or closed mechanically, electrically, hydraulically, pneumatically, or by any other means, including a removable plug.

Abstract: Apparatuses, systems, and methods for controlling the position of the interface between two or more laminar flow stream in a microfluidic device. In one embodiment, an apparatus includes a first fluid reservoir shaving an output, a first pressure sensor connected to the output of the first fluid reservoir, a first actuator connected to the first fluid reservoir, a feedback loop connected between the first pressure sensor and the first actuator, a second fluid reservoir having an output, a second pressure sensor connected to the output of the second fluid reservoir, a second actuator connected to the second fluid reservoir, a feedback loop connected between the second pressure sensor and the second actuator, and a microfluidic device including a first input connected to the output of the first fluid reservoir, a second input connected to the output of the second fluid reservoir, and an output.

Abstract: A stepped down groove 53 is provided around the peripheral surface of a rod portion 43 of a spool 40 which faces a third oil groove 33. Both the axial ends 53a and 53b of the stepped down groove 53 are located axially outside of both the axial ends 33a and 33b of the third oil groove 33 at least while the valve is in pressure-adjusting condition. Also, another stepped down groove 52 is provided around a land 42 which faces a first oil groove 31. Both the axial ends 52a and 52b of the stepped down groove 52 come, respectively, to the right and left sides of the axial end 31b of the first oil groove 31 to which end the spool 40 shifts to increase the opening of the oil groove at least while the valve is in pressure-adjusting condition.

Abstract: An integrated hydraulic control system includes a steering control unit and a priority flow divider integrated into a unitary casing. An interface fluidly couples the casing for the steering control unit and priority flow divider directly to a control valve casing. All hydraulic communication between the steering control unit, the priority flow divider, and the control valve are located inside the casings.

Abstract: The invention relates to a device for adjusting the pressure in the chambers of a hydraulic jack comprising a hollow valve seat extending substantially longitudinally between two end sections, the body of the valve seat being connected to a source of pressurised fluid, each of the end sections of the valve seat being linked to a chamber of the hydraulic jack and adapted to receive a valve allowing to control the refilling with hydraulic fluid of said chamber of the jack, characterised in that a valve return spring is placed inside said valve seat and in that each of the ends of said valve return spring is attached to one of said valves.

Abstract: A valve mechanism to control fluid flow between a fluid pumping device and a system that includes an inlet from the fluid pumping device, a first valve, a second valve, a first outlet fluidly connected to the system, and a second outlet. The first valve prevents backflow of fluid when the fluid pumping device discontinues pumping fluid to the system. The second valve checks fluid flow through the valve to the first outlet when fluid pressure at the inlet is less than a first predetermined pressure. The second valve permits fluid flow from the pump through the valve to the system only when fluid pressure at the inlet is greater than the first predetermined pressure. The second valve prevents fluid pressure in the system from substantially exceeding a second predetermined pressure when the pumping device is not pumping fluid to the system.

Abstract: A diverter valve includes a valve bore having a set of valve seats associated with each fluid outlet port. Each set of valve seats is at least partially separated from one another by a flow channel. The valve seat configuration increases the impact area for the valve element. As a result, the impact force upon seating against the valve seats is reduced. Moreover, by including flow channels between the sets of valve seats, the switching force and performance of the valve element is not adversely affected.

Abstract: A hydraulic valve assembly, for use in a hydrostatic transmission, for controlling fluid transfer between a first, a second and a third line, wherein two of the lines define first and second pressure lines, within a closed-loop circuit. The valve assembly comprises: a valve body having ports in communication with the three lines; a spool bore; a valve spool, adapted for sealing reciprocation within the spool bore, having a first and second end portion, a connecting portion, and a first and second bypass orifice within the valve spool; and dampers for centering the valve spool. This spool is movable from a neutral position occurring when the fluid pressure forces in the first and second pressure lines are substantially similar, to a first or a second position occurring when the fluid pressure force in the first pressure line is greater or less than that in the second pressure line, respectively.

Abstract: A fuel injector for a turbomachine engine, the injector comprising an injector body having pressurized fuel admission means, a first valve mounted downstream from the pressurized fuel admission means and arranged to admit fuel into the injector body, a second valve mounted downstream from the first valve and capable of opening in order to meter at least a fraction of the fuel admitted into the injector body for utilization means for using the fuel, the metered fuel flow rate to the utilization means being a function of flow sections formed through the second valve, the injector further comprising a diaphragm placed between the pressurized fuel admission means and the first valve so as to set the rate at which fuel is admitted into the injector body at a determined value.

Abstract: A double directional check valve and flow restrictor combination including a housing which contains a pair of axially-aligned check valves and a flow restrictor disposed between the check valves. Dry purge air flows into the housing through the flow restrictor, which facilitates smooth and uniform flow of the air, and out of one of the check valves to a dessicant chamber to dry or regenerate dessicant in the chamber. The housing is fitted with flanges or other connection structures for quick, easy and convenient attachment of the housing to a piping network in an air, nitrogen or other process drying system.

Abstract: A delayed triple pressure flow valve for controlling the hydraulic fluid passing to two work stations.

Abstract: A switching device for a machine, especially a digger, has at least one supply connection and one useful connection in addition to at least one hydraulic accumulator. An on-off valve is arranged between the supply connection and the useful connection, and separates the supply connection at least partially from the useful connection in one of its switching positions, in addition to ensuring that the hydraulic accumulator is charged on the fluid side via the supply connection. In another switching position, the supply connection is connected to the useful connection. A substantial improvement relative to conventional switching devices is attained by being able to guarantee an emergency function before the machine is used to perform work.

Abstract: A cooling nozzle in accordance with the invention cools the piston of an internal combustion engine. The nozzle includes a nozzle body with a penetrating part shaped to engage in a bore of the engine and to receive a cooling fluid. The nozzle includes an internal valve consisting of a piston guided and sliding in a guide bore of the nozzle body. The piston includes a head oriented in the upstream direction and bearing against an annular seat. The piston is urged towards the annular seat by a compression coil spring. The cooling nozzle for high-pressure engine cooling circuits and incorporating an internal valve obtained therefore has greater durability.

Abstract: A compressed air control apparatus for compressed air systems of motor vehicles includes a pressure controller (2), an air dryer (4) and a multi circuit protection valve (3). The pressure controller (2) controls the pressure in the compressed air control apparatus. The pressure controller (2) includes an outlet valve (8). The air dryer (4) dries the compressed air flowing through the compressed air control apparatus. The multi circuit protection valve (3) supplies a plurality of circuits (I, II, III, IV, V) with compressed air. The multi circuit protection valve (3) includes a plurality of overflow valves (23), at least one solenoid valve (32) and a regeneration conduit (36). Each of the overflow valves (23) is associated with one of the circuits (I, II, III, IV, or V). The at least one solenoid valve (32) arbitrarily operates the overflow valve (23), and it controls a regeneration phase of the air dryer (4) in which water is removed from the air dryer (4).

Abstract: A compressed air control apparatus for compressed air systems of motor vehicles includes a pressure controller (10) for controlling the pressure, an air dryer (6) for drying the compressed air flowing through the compressed air control apparatus and a multi circuit protection valve (9) for supplying a plurality of circuits (I, II, III, IV, V) with compressed air. The multi circuit protection valve (9) includes at least one solenoid valve (35) including a deaerating connection (15) leading to the atmosphere and a plurality of overflow valves (18). Each of the overflow valves (18) is associated with one of the circuits (I, II, III, IV or V). The overflow valves (18) include a valve body (20), a flow chamber (23), a rear chamber (34), a first effective surface (22), a second effective surface (27), a third effective surface (33) and a spring (31) being located in the rear chamber (34). The valve body (20) separates the flow chamber (23) from the rear chamber (34).

Abstract: Microfluidic flow control devices are provided. In one embodiment, a regulating device includes overlapping channel segments separated by a deformable membrane in fluid communication with one another. Pressure differentials between the channel segments deform the membrane towards the channel with the lower pressure, thereby restricting flow.

Abstract: A hydraulic circuit (10) is disclosed for use in controlling a horizontal boring machine which requires hydraulic fluid under pressure for rotating a drill bit or backreamer through a rotation circuit and hydraulic fluid under pressure for thrusting the drill bit or backreamer within the bore hole through a thrust circuit. Pressures from both the thrust circuit and control circuit are combined through restrictors in a mixing zone or area (26). The control port of a diversion valve (32) is connected to mixing zone (26). When the combined pressure in the mixing zone exceeds the adjustable spring bias on the diversion valve, the diversion valve will open, diverting fluid from the thrust circuit to a low pressure zone. This will cause a reduction in the pressure in the rotation circuit as well. The reduction of both pressures will reduce the combined pressure in the mixing zone (26), causing the diversion valve to close and the pressures to increase.