Abstract: A single-die injection pump for high-speed internal combustion engines is proposed, which because of its compact design and good volumetric efficiency, in conjunction with a high oscillation frequency of the piston, has a pumping quantity comparable to a multiple-die injection pump, without causing excessively high peak torque values in the drive of the single-die injection pump.

Abstract: A pump according to the present invention has a circular diaphragm 4 placed at the bottom of a casing 2. At the bottom of the diaphragm 4, a piezoelectric element 6 is installed in contact with the diaphragm 4. A narrow space between the diaphragm 4 and the top wall of the casing 2 constitutes a pumping chamber 8. An inlet flow path 12 and an outlet flow path 14 are open to the pumping chamber 8, wherein a check valve 10 is installed in the inlet flow path 12. Immediately downstream of the pumping chamber, the outlet flow path 14 has a narrow segment 16. The narrow segment 16 of the outlet flow path has ½ the diameter and ¼ the cross sectional area of the outlet flow path 14. The outlet flow path 14 has a return inlet 22, which is connected to a return outlet 23 in the inlet flow path via an active valve 24. The active valve 24 is opened and closed freely by an actuator 26 made of shape-memory alloy.

Abstract: A metering device contains a rotor which defines elongate chamber, there being a shuttle contained within the chamber movable between two terminal end positions. Frusto-conical surfaces defined on the rotor cooperate with annular members defining corresponding seats. One passage extends from one end of the chamber to one frusto-conical surface, and another passage extends from the other end of the chamber to the other frusto-conical surface. Each annual element defines a respective inlet and outlet for fluid and a shuttle is present within the chamber. As the rotor rotates, the shuttle effects a shuttling movement thus measuring dispensed volumes of fluid. A sensor is provided to detect physical contact of the shuttle with the end of the chamber to cause the rotor to advance.

Abstract: In order to provide a method for high volume and high pressure operation of a variable delivery type single cylinder plunger pump, the displacement of the piezoelectric element 20 is magnified by a hydraulic displacement magnifying mechanism comprising a large-diameter bellows 204, a small diameter bellows 202 and working fluid 208, and an engaging member 201 is displaced to control the time interval of opening and closing the intake valve 5. The large-diameter bellows 204 is used at all times in the state compressed in the direction of displacement transfer, thereby ensuring that the pressure of the working fluid 208 is maintained at a positive value to prevent vapor from being generated.

Abstract: A system for dispensing and filtering fluid is disclosed, in which the fluid flow path is substantially vertical from the fluid inlet through fluid dispense. Substantially all wetted surfaces are Teflon® or some similar non-contaminating fluid, for applications such as cleanroom processes. A valve and a filter chamber are incorporated into a pump head to simplify the flow path and reduce potential contamination points. Preferred methods, and chips or other microelectronic devices fabricated from the apparatus or methods, are also disclosed.

Abstract: A multilayer ceramic micropump including a monolithic ceramic package formed of a plurality of ceramic layers defining therein an integrated first ball check valve, and a second ball check valve in microfluidic communication with the first ball check valve, and an actuator characterized as actuating a pumping motion, thereby pumping fluids through the first ball check valve and the second ball check valve.

Abstract: An actuator device for forced air supply comprises two diaphragms 8 and 9 facing each other, voice coils 6 and 7 attached onto surfaces of the respective diaphragms 8 and 9, a magnet 2 integral with pole pieces 3 and 4, a yoke 5 facing the pole pieces 3 and 4, and a housing 1 hermetically holding a relative space between the diaphragms 8 and 9, and is structured as an air pump by means of the two diagrams 8 and 9 which oscillate repetitively and continuously by providing an air inlet 16 and an air outlet 17 which lead to the relative space between the diaphragms 8 and 9 and providing an on-off valve 18 on the inside corresponding to the air inlet 16 and an on-off valve 19 on the outside corresponding to the air outlet 19.

Abstract: Disclosed is an exhaust valve capable of correctly opening/shutting an exhaust port of a cylinder based upon variation of the flux density of an electromagnet. The inventive exhaust valve may comprise a guide connected in parallel to an exhaust port of a cylinder, a needle valve provided inside the guide for opening/shutting the exhaust port while moving in cooperation with the guide. The needle valve may be controlled with an electromagnet. The invention enables complete opening of the exhaust port of the cylinder in exhaustion thereby preventing degradation of compression efficiency due to valve damage while reducing generation of vibration and noise.

Abstract: A multilayer ceramic micropump including a monolithic ceramic package formed of a plurality of ceramic layers defining therein an integrated first ball check valve, and a second ball check valve in microfluidic communication with the first ball check valve, and an actuator characterized as actuating a pumping motion, thereby pumping fluids through the first ball check valve and the second ball check valve.

Abstract: A fuel injection system for internal combustion engines essentially has a high-pressure injection pump, supplied with fuel from a low-pressure region, and a magnetic piston valve serving to control the injection pump. The magnetic valve having two coaxial valve chambers, communicating with one another through a valve opening but separable from one another by a valve seat, and an armature chamber. The armature chamber communicates with the inlet side via a pressure conduit, and the low-pressure valve chamber communicates with the outlet region of the injection pump. The low-pressure valve chamber has a fuel inlet conduit and a fuel outlet conduit, both of which have a gradually tapered cross section compared to the cross section of the remaining regions of the fuel inlet conduit and fuel outlet conduit. Maximal prevention of cavitation is successfully achieved in the region of the low-pressure valve chamber and hence cavitation erosion that is possible as a consequence of cavitation.

Abstract: The invention relates to a pump (10) with a proportional-volumetrical dosing unit for conveying a predetermined volume of a liquid in a range of less than about 1 ml in a precisely dosed manner. The pump is provided with a cavity (22) for receiving the liquid and is limited on one side by a membrane (20) that can be displaced by means of a lifting device (18) to change the cavity's volume. The pump (10) further comprises a lockable inlet valve (30) between a liquid reservoir and the cavity (22), a lockable outlet valve (34) between the cavity (22) and a liquid dispenser and a lockable air vent valve (32) between the cavity (22) and the ambient atmosphere. The pump is especially useful for applying a precise, defined and reproducible volume of a lacquer or an adhesive on the surface of a disk-shaped data carrier for generating a thin lacquer or adhesive film.

Abstract: A high pressure pump for preventing distortion of a sealing surface or a cylinder form. The high pressure pump has an intermediate member including a cylinder body (4) having a pressurizing chamber (14) communicated with a cylinder (4a) accommodating a plunger (12). Fluid in the pressurizing chamber is pressurized by reciprocating the plunger. The intermediate member is arranged between a cover (6) and a flange (8) and is clamped by clamping bolts (40). An electromagnetic spill valve (10) for receiving reaction force from the pressurizing chamber when the fluid in the pressurizing chamber is pressurized is attached to the cover (6) at a position for reducing the clamping force applied to the intermediate member by the clamping bolts.

Abstract: A positive displacement pump is composed of a first actuator for relatively moving a piston and a housing, a cylinder for accommodating the piston, and a second actuator for relatively moving the cylinder and the housing.

Abstract: A multilayer ceramic micropump including a monolithic ceramic package formed of a plurality of ceramic layers defining therein an integrated first ball check valve, and a second ball check valve in microfluidic communication with the first ball check valve, and an actuator characterized as actuating a pumping motion, thereby pumping fluids through the first ball check valve and the second ball check valve.

Abstract: A high pressure pump includes a cylinder body. The cylinder body has a cylinder and a valve recess communicated with the cylinder. A cover is attached to the cylinder body to surround the valve recess. A plunger reciprocates in the cylinder. An electromagnetic valve has a pressurizing chamber, a valve hole connected to the pressurizing chamber and a valve body. The valve body selectively opens and closes the valve hole. The electromagnetic valve is fixed to the cover. When fluid is pressurized in the pressurizing chamber, the valve hole is closed by the valve body and the plunger enters the pressurizing chamber. A seal ring is located between an outer surface of the electromagnetic valve and an inner surface of the valve recess. The seal ring seals the pressurizing chamber. This reliably seals a pressurizing chamber and improves the displacement efficiency.

Abstract: In order to provide a method for high volume and high pressure operation of a variable delivery type single cylinder plunger pump, the displacement of the piezoelectric element 20 is magnified by a hydraulic displacement magnifying mechanism comprising a large-diameter bellows 204, a small diameter bellows 202 and working fluid 208, and an engaging member 201 is displaced to control the time interval of opening and closing the intake valve 5. The large-diameter bellows 204 is used at all times in the state compressed in the direction of displacement transfer, thereby ensuring that the pressure of the working fluid 208 is maintained at a positive value to prevent vapor from being generated.

Abstract: A high pressure fuel pump has a plunger that extends through a cylinder and is reciprocally located in a pressurizing chamber. The plunger is reciprocated by a lifter and changes the volume of the pressurizing chamber to pressurize fuel in the pressurizing chamber. A seal member seals the cylinder from the lifter to prevent fuel that leaks from the pressurizing chamber from being mixed with lubricant that lubricates the lifter. A support to which the seal member is attached is formed separately from the cylinder. The support is fixed to the cylinder with the plunger extending through the support.

Abstract: A control valve for installation in a wobbleplate compressor with a changeable working volume is provided with an inlet for a connection to a pressure chamber, a first outlet for connection to a crank chamber, and a second outlet for connection to a suction chamber. A closing element cooperates with the second outlet and is acted upon by a device for controlling the gas mass flow.

Abstract: A fuel system arranged to deliver fuel at high pressure to a fuel injector through a high pressure fuel line defined, at least in part, within first and second housing parts of a pressure relief valve arrangement. The first and second housing parts define first and second separable valve surfaces respectively. A clamping arrangement is provided for applying a clamping load to the first and second housing parts so as to urge first and second valve surfaces respectively thereof into substantially sealing engagement. The clamping arrangement is arranged to permit separation of the first and second valve surfaces in the event that fuel pressure within the high pressure fuel line exceeds a predetermined amount, thereby to permit fuel within the high pressure fuel line to flow to a region of relatively low pressure to relieve fuel pressure within the high pressure fuel line.

Abstract: In a flow amount control device which control flow amount of fuel to be supplied to a high pressure fuel pump, an opening, which communicates with a port for passing fuel to the high pressure fuel pump, is composed of a first rectangular opening, a second rectangular opening whose circumferential length is larger than that of the first opening, and a third trapezoidal opening bridging between the first and second openings. The port communicates with the first opening, when engine speed is low, and, as the engine speed increases, with the third and second openings. Accordingly, the flow amount of fuel to be discharged from the high pressure fuel pump varies non-linearly and a change of the flow amount thereof is small in engine low speed region.

Abstract: A metering pump device, particularly for a heating appliance has a pump arrangement for the delivery of liquid which can be supplied via an inlet region to an outlet region and also a valve arrangement by means of which the pump arrangement can be selectively brought into connection with the inlet region to receive liquid or into connection with the outlet device for the delivery of liquid. The valve arrangement has a valve member that can be brought into a first actuating position and into a second actuating position. The first actuating position the valve member permits a liquid flow from the inlet region to the pump arrangement and prevents a liquid delivery from the pump arrangement to the outlet region, and in the second actuating position the valve member prevents a liquid supply from the inlet region to the pump arrangement and permits a liquid delivery from the pump arrangement to the outlet region.

Abstract: A double-acting reciprocating motor with a uni-directional fluid flow path comprises a piston disposed within a cylinder. Within the cylinder, the piston defines a first chamber between the piston and a cylinder base and a second chamber between the piston and a cylinder head. Fluid is introduced into the first chamber of the motor through an inlet port associated with the cylinder base. A pass-through valve controls the flow of fluid from the first chamber to the second chamber. An outlet valve regulates the draining of fluid from the second chamber through an outlet port associated with the cylinder head. Fluid pressure within the first chamber urges the piston towards the cylinder head when the pass-through valve is closed and the outlet valve is open. The piston surface facing the second chamber is larger than the piston surface facing the first chamber, so the piston moves towards the cylinder base when the pass-through valve is open and the outlet valve is closed.

Abstract: An active pneumatic component for pneumatically controlling a hydraulic bearing includes an electrically driven oscillating membrane pump combined with a multiway valve into an integrated structural component, in such a way that an armature which activates the oscillating membrane also controls the valve functions of the multiway valve. The valve also containing the inlet and outlet valves of the pump.

Abstract: A variable-delivery high-pressure fuel pump having a pump chamber varying in volume as a plunger moves in and out, an inlet port valve forming a part of chamber walls of the pump chamber, the inlet port valve being opened when a low-pressure fuel is admitted into the pump chamber, while being closed when the admitted fuel is delivered out of the pump chamber, a control chamber on an opposing end of the inlet port valve to receive the low-pressure fuel from the fuel inlet passage, and a control valve for intermittently opening and blocking a fluid communication between the control chamber and the fuel inlet passage. The inlet port valve is a poppet valve made with a valve head having a valve face moving off and reseating against a valve seat in the pump chamber, and a valve stem integral with the valve head and extending out of the pump chamber into the control chamber.

Abstract: In an electromagnetic valve, a composite valve case has a cylindrical hollow and a composite valve body formed in spool shape is slidably housed in the cylindrical hollow. The composite valve body has not only an inherent valve function for changing fluid path area according to its movement in the cylindrical hollow but also an armature function for constituting a magnetic circuit. The composite valve case has not only a cylinder function for allowing the valve body to slidably move but also a stator function for constituting a magnetic circuit.

Abstract: A reciprocating compressor that includes an auxiliary port 38 in series with a check valve 40 to move fluid at an intermediate pressure that is between the main suction and discharge pressures. Piston 31 normally covers the auxiliary port during a portion of its stroke. In one embodiment the check valve 40 is oriented so that fluid flows into the compressor. The piston 31 uncovers the auxiliary port 38 during the early part of the down stroke to allow fluid in through the port. As the piston 31 continues to move down it covers the auxiliary port, which drops pressure in chamber 37 to allow fluid to enter through a main suction valve 34. In other embodiments the orientation of the check valve is reversed and auxiliary port acts as an auxiliary discharge port. Multiple auxiliary ports may be used in a single cylinder to achieve multiple suction and/or discharge pressures.

Abstract: A jerk pump provided for an internal combustion engine has an integral solenoid valve in which a pump plunger driven by a cam delivers fuel at high pressure through a channel that extends in the pump housing and through an injection line to an injection nozzle. An armature of the solenoid valve cooperates with a spring-loaded valve piston by which the channel-guiding high-pressure side can be connected with a low-pressure side. In order at least largely to avoid rebounding of the solenoid valve in such jerk pumps, provision is made such that the valve piston has an absorbent body held in its resting position by spring force, said absorbent body striking a stop body that holds the valve piston in its closed position when the valve piston is resting on its valve seat.

Abstract: A high pressure pump includes a cylinder body. The cylinder body has a cylinder and a valve recess communicated with the cylinder. A cover is attached to the cylinder body to surround the valve recess. A plunger reciprocates in the cylinder. An electromagnetic valve has a pressurizing chamber, a valve hole connected to the pressurizing chamber and a valve body. The valve body selectively opens and closes the valve hole. The electromagnetic valve is fixed to the cover. When fluid is pressurized in the pressurizing chamber, the valve hole is closed by the valve body and the plunger enters the pressurizing chamber. A seal ring is located between an outer surface of the electromagnetic valve and an inner surface of the valve recess. The seal ring seals the pressurizing chamber. This reliably seals a pressurizing chamber and improves the displacement efficiency.

Abstract: A fuel injection pump of the distributor type which has a reciprocatingly driven pump piston that is load-bearing in a rotating distributor shaft which pumps fuel out of a pump work chamber to various fuel injection valves via a distributor opening. To control the duration of high-pressure injection, an electrically actuated valve is provided with a valve member in a valve chamber that communicates with the pump work chamber and from a second valve chamber, communicates with a low-pressure region. To terminate the high-pressure injection, the valve member makes a communication between the two valve chambers, whereupon the outflow of the fuel stream is controlled by disposing a diameter constriction in the connecting line, thus reducing any tendency to cavitation.

Abstract: Pumps and injectors having a control valve spring arrangement configured to provide a force step when the control valve is at a rate shape position, and related methods for operating a control valve, are provided. The control valve is moveable over a stroke range between an open position and a closed position. The stroke range includes a rate shape position. The control valve spring arrangement is configured to provide a first spring force when the control valve is between the closed position and the rate shape position, and to provide a second spring force that is less than the first spring force when the control valve is between the rate shape position and the open position.

Abstract: The invention relates to a closed level control system for a vehicle. The closed level control system includes a pump which transfers a pressurized medium between a pressurized medium supply vessel (4) and pressurized medium chambers (2a to 2d). The input (8) of the pump (6) is connected to the supply vessel (4) and the output (10) of the pump (6) is connected to the pressurized medium chambers (2a to 2d) when the pressurized medium is to be pumped from the supply vessel (4) into the pressurized medium chambers (2a to 2d). If, in contrast, pressurized air is to be pumped from a pressurized medium chamber (2a to 2d) into the supply vessel (4), then the input (8) of the pump (6) is connected to the pressurized medium chamber and the output (10) of the pump (6) is connected to the supply vessel (4). The above-mentioned connections preferably take place via controllable directional valves (14, 18). The level control system makes it possible that the pump (6) has to always run only in one direction.

Abstract: A micropump fabricated in a planar substrate is provided with a valving chamber which is communicated to a pumping chamber. The valving chamber has an inlet and outlet port. Both the valving chamber and pumping chamber have a liquid, electrically conductive piston disposed therein, which liquid piston is nonmiscible with the pumped working fluid and nonreactive with the substrate in which the chambers are formed. The valving piston is magnetohydrodynamically driven to selectively close either the inlet port or the outlet port. The pumping piston is magnetohydrodynamically driven to pull or push the working fluid through one of the inlet or outlet ports, through the valving chamber, into the pumping chamber, back out of the pumping chamber and through the other one of the inlet or outlet ports after activation of the valving piston. Both direct current and inductive magnetohydrodynamic drives are contemplated.

Abstract: A compressed gas dispensing station having a high pressure gas compressor with a cyclic control system for selective recirculation of cooled, ultra high pressure gas through the compression chamber after the end of the compression stroke for scavenging hot compressed gas from the compression chamber and providing a residual, partially-expanded replacement gas for the expansion stroke which is mixed with the incoming, new charge of gas for a cryogenic gas at the start of compression and a relatively low temperature gas at the end of compression for a single stage compressor.

Abstract: Mechanical complexity and high cost in a fluid flow control system are avoided through the use of a pulse width modulated (PWM) valve (20) to meter a fluid flow to an inlet (50) of a pump (16) that pumps the metered flow to an outlet (56) of the fuel pump (12). The system utilizes a pulsating vapor core in the pump (16) to dampen the pulses in the fluid flow generated by the PWM valve (20). A regulator valve (22) is provided to maintain a relatively constant pressure drop across the PWM valve (20). The control system is ideally suited for controlling the flow of fuel to a gas turbine engine.

Abstract: Method for the stepless regulation of the delivery of a suction valve of the plate-type of construction, comprising a valve plate which is actuated by an electromagnet arranged in a valve catcher, wherein the electromagnet is so controlled that, in a first control phase (11a), the valve plate (3) firmly contacts the valve catcher (6), or a damper plate (4) arranged between the valve catcher (6) and the valve plate (3) and is blocked, and that, in a second control phase, the electromagnet (9) is controlled by a decaying alternating current, in order to demagnetise the valve plate (3), so that the valve plate is released.

Abstract: The invention relates to a metering pump comprising a pump chamber (2) having a longitudinal axis (3) and presenting an admission orifice (4) and a delivery orifice (5), a piston (6; 30) pierced by a pump orifice (7), a drive rod (8) for driving the piston (6; 30), a non-return valve (17) mounted to move relative to the piston (6; 30), and a sleeve (9) of non-magnetic material mounted stationary inside the pump body (1) parallel to the longitudinal axis (3) of the pump chamber (2) and possessing a closed end (10) situated inside the pump body (1), and an open end (11) opening out to the outside of the pump body (1), the drive rod (8) being fitted with a magnetic element (12) co-operating, through the sleeve, with a magnetic cage (13) surrounding the sleeve (9) and coupled to the piston (6; 30).

Abstract: An improved capacity modulation system for scroll-type compressors is disclosed in which a valve body of a solenoid valve assembly is secured to the inner wall of the hermetic shell and the actuating coil is mounted on the outer surface thereof. The actuating coil includes a plunger/valve member which cooperates with passages provided in the valve body to selectively actuate the capacity modulation arrangement utilizing compressed fluid. The construction offers the advantage that all fluid pressure lines are located within the hermetic shell and thus protected from potential damage, the solenoid coil may be easily changed/replaced to accommodate different available operating voltages and/or malfunction thereof and the system can be easily tested prior to final welding of the outer shell.

Abstract: A scroll-type compressor having a capacity modulation system of the delayed suction type is disclosed which incorporates a valving ring rotatably supported on one of the scroll members. Seals are provided acting between the valving ring and scroll member which serve to effect a fluid tight sealing relationship therebetween when the compressor is operating in a full capacity mode thus reducing the need for maintaining tight tolerances during manufacture of the valving ring.

Abstract: A high pressure pump which has a working chamber, which on the one hand, is connected to a low pressure circuit via a solenoid valve and on the other hand, is connected to a high pressure reservoir via a check valve. The solenoid valve has a spring-loaded closing body, which cooperates with a valve seat and together with it, constitutes the check valve. When the magnet is without current, the check function of the closing body is switched off via a valve tappet of the solenoid valve so that even with an initial working stroke of the high pressure pump, the connection to the low pressure circuit is maintained. Only with a supply of current to the solenoid valve executed during the working stroke does the valve tappet allow the closing body to contact its valve seat, whereupon the high pressure delivery then begins. The high pressure pump is designated for use in fuel injection systems of diesel motor vehicle engines.

Abstract: A turbomolecular pump evacuates gas in an apparatus (or a chamber) by means of a rotor having blades and/or spiral grooves which rotates at a high speed. The turbomolecular pump includes a casing housing a rotor and a stator therein, a pumping section comprising the rotor and the stator, a valve element capable of opening or closing an intake port of the casing, and a supporting member for supporting the valve element. The supporting member extends through at least one of the rotor and the stator. The turbomolecular pump further includes an actuating mechanism for actuating the valve element, and the actuating mechanism is provided at a side opposite to the intake port with respect to the rotor.

Abstract: A fuel pump or injector has a control valve with a piston valve body axially movable over a motion displacement interval defined by first and second sub-intervals. A first control valve spring causes the piston valve body to be biased toward the unactuated position whenever the piston valve body is in the first sub-interval. A second control valve spring causes the piston valve body to be biased into damped engagement with the valve stop whenever the piston valve body is in the second sub-interval.

Abstract: An armature having a middle beam portion connected to an outer body portion flexes during actuation of the control valve so that movement of the control valve relative to the armature outer body portion is damped as the control valve moves to the actuated position. The armature has at least one slot formed at the interface of the middle beam portion and the outer body portion. The at least one slot is configured to allow the armature to flex.

Abstract: A variable-discharge high pressure pump capable of facilitating the manufacturing and providing sufficient lubrication. The pump comprises a cam shaft provided with a cam surface by which a tappet displaces in accordance with the cam surface, a plunger connected to the tappet to reciprocate in accordance with the reciprocation of the tappet and accommodated in a cylindrical cylinder. Also included are a cylinder head having a contact surface brought into contact with one end surface of the cylinder. The cylinder head has a small-diameter recess portion made in the contact surface to be coupled to the cylinder and constitutes a pump chamber in conjunction with a head portion of the plunger.

Abstract: A fuel pump for a vehicular diesel fuel pump member having a control valve assembly which includes a housing having a control valve chamber, and an actuatable control valve disposed in the control valve chamber. The control valve includes a piston valve body axially movable over a motion displacement interval between first and second positions. The motion displacement interval is defined by first and second sub-intervals bounded by the first and second positions, respectively. The control valve assembly further includes means for actuating the control valve. A valve stop is disposed in the housing adjacent the control valve chamber, and a piston valve body seat contacts the valve stop whenever the piston valve body is in the second position. The piston valve body seat contacts a pump body seating surface whenever the piston valve body is in the first position.

Abstract: A novel reciprocating pump for cryogenic fluids having a super-low NPSH requirement. The pump has a spring-loaded intake valve made of magnetic material and a reciprocating piston having a permanent magnet at its head end. The intake valve is positioned such that when the piston is at or near the top of its stroke, the magnet will tend to pull said intake valve into an open position. The pump also preferably includes a mechanical spring energized (MSE) seal on the upper end of the piston.

Abstract: A liquid medicine supplying system comprises a housing 11 including a pump chamber 27, a diaphragm 28 for changing a volume of the pump chamber 27, a first flow path 31 for guiding liquid in a liquid storage tank to the pump chamber 27 and a second flow path 32 for guiding the liquid stored in the pump chamber 27 to a liquid discharge portion. A first valve body 34 for on-off operating the first flow path 31 is disposed in the first flow path 31. A second valve body 35 for on-off operating the second flow path 32 is disposed in the second flow path 32. Furthermore, a magnet 41 on the follow up side is provided in the valve body 34 and the second valve body 35. Then, in the housing 11, there are provided magnets 43a, 44a and the like cause the magnetic field to act on the magnet 41 on the follow up side, whereby the first valve body 34 and the second valve body 35 are set at opening positions or closing positions.

Abstract: A pump for a fuel injection system, the pump primarily including a pump body having a pumping chamber and a pump body end portion, a control valve disposed in a control valve chamber, a reciprocatable plunger, and a cylindrical sleeve having first and second end portions. The first end portion of the sleeve interfits with the pump body end portion. The second end portion of the sleeve slidably interfits with a cam follower assembly for allowing the cam follower assembly to drive the plunger. The plunger is reciprocated with respect to the sleeve over a stroke range between an extended position and a retracted position. A plunger spring biases the plunger to the retracted position. The pump body end portion is press-fit into the first end portion of the sleeve, and sufficiently induces compressive forces in the pump body for acting on the pumping chamber to oppose pumping chamber expansive forces.

Abstract: A pump having a three-way valve has a motor for generating a turning effect by an electric power applied thereto. The pump pressurizes a fluid by using an impeller. The three-way valve is installed to the inlet side of the pump. A magnetic plate and ball swing between the first inlet and second inlet by means of load switches as many as a predetermined angle. The pump and three-way valve are integrally formed to require no separate piping between the three-way valve and pump. Thus, the manufacturing processing of the boiler is reduced while enhancing productivity. An installation space is shrunken to decrease the external dimensions of a product such as boilers.

Abstract: A fuel injection pump of the distributor type which has at least one pump piston driven in a reciprocating stroke motion, a rotating distributor shaft which via a distributor bore upon rotation establishes a communication between the pump work chamber, defined by the pump piston, and an injection nozzle, and a switching valve for metering the fuel injection quantity. To achieve highly stable hydraulics upon opening and closing of the switching valve, a low-pressure piston is connected to the valve member of the switching valve; the low-pressure piston is axially displaceably guided on the low-pressure side of the switching valve, downstream of the outlet of a relief bore, in a wall segment. Preferably, the outer diameter of the low-pressure piston is made to largely approximate the diameter of the seat face of the valve member on the associated valve seat.

Abstract: A fluid delivery system is disclosed which includes a pump and a fluid delivery set. The fluid delivery set includes a stop cock valve, and the pump includes a valve actuation unit into which the stop cock valve is positioned for operation of the system. The valve actuation unit includes a valve receiving mechanism which requires the valve to be closed in order to be inserted into or removed from the valve actuation unit, thereby preventing accidental free flow of fluid at all times. The fluid delivery set may also include an auxiliary fluid source to allow periodic flushing of the fluid delivery line, and the valve actuation unit can be programmed by the pump to automatically initiate periodic flushing cycles if desired.