Abstract: The invention refers to a magnetic drive comprising a magnetizable body and an at least partly magnetic hinged armature. Depending on the degree of magnetization of the magnetizable body the hinged armature can take at least two different positions on the body. The hinged armature is formed by an armature support carrying a magnetic armature part.

Abstract: A solenoid unit for a solenoid valve, including a magnet coil and a ferromagnetic circuit which surrounds the magnet coil and comprises a stationary magnet housing, a movable magnet armature and, if required, an armature antipole, the magnet housing being assembled of a cover, a shell and a bottom in the form of multiplayer transformer sheet metal parts.

Abstract: Gas flow control for a plasma arc torch is provided. More particularly, a method and apparatus to modulate the pressure and flow from a plasma arc torch is provided. Cyclic pulsing of a flow control valve between states of fully open and fully closed provides for a relatively constant flow of plasma gas to the torch at a relatively constant pressure.

Abstract: The invention relates to a magnet valve having a valve body, in which at least one inlet conduit and/or at least one outlet conduit of the magnet valve is provided in at least some regions in the valve body. The inlet conduit and/or outlet conduit are in fluidic communication with a valve seat of the magnet valve. According to the invention in the valve body, a receptacle region is provided, in which an insert part having or embodying the inlet conduit and/or the outlet conduit in at least some regions is disposed. The invention further relates to a driver assistance system having such a magnet valve.

Abstract: The disclosure relates to a solenoid valve (1) having a solenoid armature (2) which is operatively connected to a sealing element (5) of the solenoid valve (1) in order to move the same, and an armature opposing piece (16) which engages, at least in certain areas, in a receptacle opening (23) in the solenoid armature (2). There is provision here for the armature opposing piece (16) to be composed of a pole core (19) and an intermediate component (20) which is supported on the pole core (19), wherein only the intermediate component (20) is arranged at least in certain areas in the receptacle opening (23), and at least one venting opening (33, 36), which produces a fluid connection between the receptacle opening (23) and the surroundings of the solenoid armature, is formed in the intermediate component (20). The disclosure also relates to a driver assistance device.

Abstract: The invention relates to a magnet valve having a valve body, in which at least one inlet conduit and/or at least one outlet conduit of the magnet valve is provided in at least some regions in the valve body. The inlet conduit and/or outlet conduit are in fluidic communication with a valve seat of the magnet valve. According to the invention, the valve body is provided with a receptacle region, in which an insert part embodying the valve seat is disposed. The invention also relates to a driver assistance system having such a magnet valve.

Abstract: A housing for an armature of a fuel injector, a fuel injector and a fuel injection system are disclosed. The armature housing includes a first cylindrical portion for slidably accommodating the armature pin. The first cylindrical portion has a minimum inner diameter that is closely matched to the maximum outer diameter of the armature pin. A second cylindrical portion of the armature housing accommodates the armature. The second cylindrical portion has an inner minimum diameter that is closely matched to the maximum outer diameter of the armature. The disclosed armature housing provides more reliable and more consistent movement of the armature.

Abstract: A solenoid arrangement comprises a pole tube which is axially subdivided into a pole core section, a transition section, and a tube section. A magnetic flux between the pole core section and the tube section is interrupted by the transition section. An armature is movably guided in the pole tube and has, at its end facing the pole core section, a flange which axially projects from an end face. According to the invention, the pole core section has a stepped depression into which the armature can plunge and which, starting from the transition section, is subdivided into an annular collar, a shoulder, and a notch which is set back axially and radially. An axial dimension of the collar exceeds an axial dimension of the flange.

Abstract: The invention relates to a solenoid valve, in particular for a brake system of a motor vehicle, having an axially displaceably supported armature, on one end of which a valve sealing body is disposed and with the other end of which a pole core is associated, and having a compression spring acting in prestressed fashion between the pole core and the armature. It is provided that the compression spring is held in prestressed fashion in an axial passage of the armature, between a bolt, having the valve sealing body and held in a selectable position in the axial passage in force- and/or form-locking fashion, and a thrust piece, disposed such that it can be pushed out of the axial passage up to a stop and subjects the pole core to the prestressing force. The invention further relates to an armature for a solenoid valve. Finally, the invention relates to a method for producing an armature for a solenoid valve.

Abstract: The present invention provides a solenoid valve wherein a valve sleeve and a solenoid case can easily be formed coaxially and manufacturing costs are reduced. The solenoid valve of the present invention comprises a valve sleeve 41 provided with a spool 60 axially movable in said valve sleeve 41, a solenoid case 21 mounted to a case mounting groove 43 formed near an axial rear end of said valve sleeve 41, and a molded body 23 mounted inside said solenoid case 21 and provided with a coil 22 in said molded body 23, and a case opening portion 25 formed at an axial end of said solenoid case 21 is engaged with said case mounting groove 43, and a concave portion 29 is formed at an axial end of said molded body 23 and said axial rear end of said valve sleeve 41 is fitted to said concave portion 29.

Abstract: A pressure-regulating valve for regulating the pressure in a high-pressure fuel accumulator of an internal combustion engine, in particular in common-rail injection systems, with a valve piston (3) which is guided in an axially displaceable manner in a bore (1), is acted upon in the opening direction by the compressive force of a spring (2) and, when a magnet coil (4) is energized, undergoes an axial displacement in the direction of a first valve seat (5) counter to the compressive force of the spring (2) and counter to the pressure prevailing in the high-pressure fuel accumulator, wherein the valve piston acts on a valve-sealing element (6) which interacts with the valve seat (5).

Abstract: A first cap is mounted at a movable iron core, a second cap holding a valve member is fitted to the first cap, capable of displacement, an biasing force F1 of an iron-core return spring biasing the movable iron core toward an initial position and an biasing force F2 of a buffer spring interposed between the movable iron core and the valve member are set so as to have a relation of F1>F2, and when the movable core is located at the initial position, gaps x, y are interposed between the valve member and a regulating portion of the second cap and between an engagement projection portion of the second cap and a front end wall of an engagement recess portion of the first cap, respectively.

Abstract: An electromagnetic actuating unit (10) of a hydraulic directional control valve (9) is provided having an armature (18) which is arranged such that it can be axially displaced within an armature space (30), and includes a pole core (29) which is arranged in a receptacle (27a) and delimits the armature space (30) in a movement direction of the armature (18). Constructions are provided in order to avoid deposits on a guide surface of the armature (18), as a result of which the dynamics and the response behavior of the actuating unit (10) are increased and hysteresis effects and the risk of a malfunction of the actuating unit are minimized.

Abstract: Assembly of multiple individual fluid pressure control solenoid valves and an individual fluid temperature sensor so packaged relative to a respective one of the individual solenoid valves as to permit direct or indirect fluid temperature measurement at individual solenoid valves. The assembly can include a lead-frame support (e.g. a printed circuit board) having multiple individual fluid pressure control solenoid valves and an individual transmission oil temperature sensor disposed on the lead-frame support in an oil passage that communicates to an output flow port of a respective one of the individual solenoid valves to provide transmission oil temperature information to a transmission electronic control unit, wherein the transmission electronic control unit provides command signals to the individual solenoid valves in response to the individual transmission oil temperature input signals associated with an individual solenoid valve to achieve more accurate pressure control.

Abstract: A trim valve includes a valve housing having an inlet section and an outlet section. A valve shaft is mounted to the valve housing to be stationary with respect thereto. The valve shaft includes an internal flow passage in fluid communication with the outlet section of the valve housing. A valve rotor is disposed inboard of the valve housing and outboard of the valve shaft for modulating flow through the valve housing. The valve rotor is mounted for rotational movement within the valve housing between a fully open position in which a flow path is defined between the inlet and outlet sections of the valve housing, and a reduced flow position in which the valve rotor at least partially blocks the flow path. An actuator is operatively connected to the valve housing to actuate the valve rotor between the fully open and reduced flow positions.

Abstract: The present invention provides a three-way proportional control valve for actively controlling coolant and a proportional control method using the same. The three-way proportional control valve according to the present invention may preferably include a valve body including a pump port, through which coolant is introduced, and a radiator port and a bypass port, through which the coolant is discharged; a valve spool which linearly reciprocates on a valve path formed inside the valve body and opens and closes the radiator port and the bypass port; and a solenoid mounted on the valve body and pushing the valve spool such that the radiator port is opened and the bypass port is closed when electrical power is applied thereto.

Abstract: A socket housing formed on the side of a solenoid valve body includes a socket thereinside connected with a coil of a solenoid operation section. A power feeding terminal box for holding a pin-shaped power feeding terminal connected with a power feeding line is housed in a terminal cover. Installation of the terminal cover on the side of the solenoid valve body causes the power feeding terminal to be electrically connected with the socket and at the same time the power feeding terminal box to be locked into a locking stopper formed inside the terminal cover, thereby allowing the terminal cover to be locked and held in place.

Abstract: A refrigerant compressor has a control valve for controlling the degree of conveyance of the refrigerant compressor by setting a drive housing pressure pC of the refrigerant compressor. A control body controls a conveying-side control line between a discharge chamber, acted upon by high pressure of the compressor, and the drive housing of the compressor, and also controls a suction-side control line between the drive housing and a suction chamber, acted upon by suction pressure of the compressor variably in a throttling and/or shutting-off manner. The control body is driven electromagnetically. To improve the refrigerating capacity and the control behavior of the refrigerating system, the control body, which can shut off both the conveying-side and the suction-side control line, is also driven by means of a pressure cell.

Abstract: An electromagnetic pressure regulating valve device for regulating a hydraulic pressure including at least one pressure regulating valve which includes a solenoid part having at least one bobbin holding an electric coil, a coil core and a movably guided armature; a valve part having at least one supply connection, one return connection, one load connection and one actuating element operated by the armature and cooperating with a valve seat; and an electronic part having at least one pressure sensor for measuring the hydraulic pressure present at the load connection. At least the pressure sensor is situated on an end of the solenoid part facing the valve part upstream from the electronic part. Positioning the pressure sensor close to the valve part may substantially reduce the filter effect of the transmission link, and the hydraulic pressure to be measured is therefore transmittable free of errors up to a much higher cutoff frequency.

Abstract: There is provided a solenoid valve that realizes space-saving by reducing the size of a dedicated driving power source. There is provided a solenoid valve capable of instantaneously opening and closing that includes an electric double layer capacitor having a low direct current internal resistance and a low equivalent series resistance as a motive power supply. The electric double layer capacitor has single-cell electrical properties including a capacitance of 1 to 5 F, a rated voltage of 21 to 2.7 V, a direct current internal resistance of 0.01 to 0.1 ?, and an equivalent series resistance at 1 KHz of 0.03 to 0.09 ?, and includes a polarizable electrode made of glassy carbon having a specific surface area of 1 to 500 m2/g.

Abstract: An electromagnetic actuating unit of a hydraulic directional valve, which has an armature and a first and a second magnet yoke. The first and the second magnet yokes at least partially bind an armature space, the armature is arranged in the armature space so as to be axially displaceable, and the first and the second magnet yokes face each other in the axial direction of the armature.

Abstract: A fluid dispensing assembly, including a valve, a housing, a user interface, and a fitting to couple to a fluid source. The valve may include a first sensor detecting proper placement of the fluid container based on a magnetic material positioned at the bottom of the fluid container, a plunger having a plunger shaft coupled thereto, the plunger selectively placing the valve in fluid communication with the fluid container, and a solenoid coupled to the plunger shaft and moving the plunger shaft to transition the plunger between an open position and a closed position. The user interface may be coupled to the valve to enable selection of at least a fluid container size and a dispensing mode.

Abstract: The invention relates to a method and an arrangement for winding a winding wire onto a winding body, and to an associated magnet assembly. The start of the winding wire is threaded into a first wire-receiving slot of a first electrical connection dome. By a winding operation a predefinable number of turns are then wound onto the winding body, and one end of the winding wire is threaded into a second wire-receiving slot of a second electrical connection dome and cut off. According to the invention, the start of the winding wire which has been threaded into the first wire-receiving slot is placed on a first wire support which is arranged downstream of the first wire-receiving slot.

Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.

Abstract: A method for partially stroking an emergency valve apparatus is provided. The emergency valve apparatus comprises an actuator (103) and a valve member (101). The apparatus is movable between a first position and a second position. The method comprises the step of initiating a partial stroke movement of the apparatus from the first position towards the second position. A parameter of the fluid acting on the apparatus is measured. Once the measured parameter reaches a threshold value, the partial stroke movement is reversed.

Abstract: An actuator with a predetermined failure mode comprises two carriers which are each moveable in a common direction. A detent is engageable to couple the carriers to move in unison. An electrically operated actuating device causes extension of the toggle linkage to operate the detent and collapse of the toggle linkage when de-energised. There is a prime mover for the first carrier and a return mover for causing return movement of the second carrier on the release of the detent. In an example, the detent comprises a pivoted arm disposed on the first carrier and positioned to engage a part of the second carrier; and the toggle linkage comprises a pair of relatively pivoted links connected between a pivot on the first carrier and a pivot on the arm.

Abstract: A pressure regulator includes a valve, mechanical advantage device, actuator, controller and pressure sensor. The valve is disposed between an inlet port and an outlet port. The valve includes a pintle and seat. An actuator is provided to move the pintle away from the seat to allow the flow of gas from the inlet port to the outlet port and a pintle return spring is provided to bias the pintle towards seat. The actuator is configured to move the pintle in response to the magnitude of a control signal. A control system is provided to receive a gas pressure signal from a pressure transducer at the outlet port which detects the gas pressure at the outlet port and generate a control signal having a magnitude proportional to the detected gas pressure.

Abstract: A method and an apparatus for producing packs, in particular cigarette packs, from blanks (11, 44), wherein individual regions of a pack blank (11) are adhesively bonded to one another and, if appropriate, to one or more separate blanks (44) by the pack blank (11) being provided with individual portions of glue (28, 29) by means of a valve or a group of valves (26) and blank regions which are to be adhesively bonded together subsequently being held or pressed on one another, wherein the individual portions of glue (28, 29) are applied to the blank regions by means of the glue valve (27) or the group of glue valves (26), and/or wherein a control and/or regulating device (65) automatically controls and/or regulates the size or quantity of the respectively produced portion of glue (28, 29), which size or quantity is produced by the at least one glue valve (27) during an individual valve opening cycle, as a function of at least one parameter.

Abstract: A portable one-to-many control device for a sprinkler pipeline including a plurality of control valves at the sprinkler pipeline. The control valve has a main body; a memory and drive unit positioned within the mounting body; and a portable control instrument movably and electrically connected to the memory and drive unit of the different control valve. According to the data saved in the microprocessor and the different requirements of the control valves, the preset instructions can be saved in the memory and drive unit for controlling the activation time of the electromagnetic solenoids, respectively. In this way, many control valves can be set and controlled by only one portable control instrument. Accordingly, the cost can be saved and it is not necessary to be placed outside for the protection from damage. Meanwhile, it is easy to connect to the personal computer for a mutual data transmission, thereby achieving a more convenient and accurate control of the sprinkling process.

Abstract: An implantable medical device is disclosed that includes a valve body and a valve rotor adjustable with respect to the valve body. A tool can be utilized to determine and control a position of the valve rotor with respect to the valve body. The tool can include a valve body position reader, a valve rotor position reader and a valve rotor position controller to determine a valve setting for the device and adjust the valve setting as desired.

Abstract: A spraying device for spraying fragrance, pest control composition and/or a sanitizing composition held within a pressurized container, the spraying device comprising a container receiving section (13) and a switching section (10) wherein the switching section (10) incorporates a solenoid switch.

Abstract: A solenoid valve has a valve body with an inlet, an outlet and a valve chamber therebetween. A valve member is selectively engagable with the valve chamber for controlling the flow of fluid from the inlet to the outlet. A solenoid assembly is mounted upon the valve member for moving the valve member to control the flow of fluid from the inlet to the outlet. The solenoid assembly includes a solenoid and a frame for holding the solenoid. The solenoid assembly is connected to the valve body such that the frame is rotatable and slidable away from the valve body to permit access to and slidable removal of the solenoid from the valve member.

Abstract: Methods and apparatuses for injecting starting fluid into an internal combustion engine are provided, through use of a control valve having a two-stage filter apparatus disposed upstream of a metering device internal to the control valve, a valve arrangement for positively opening and closing a gas pathway through the valve having a conical-shaped valve poppet and seat arrangement, an electrical solenoid having an electrical coil thereof operatively attached to the control valve in such a manner that the electrical coil may be removed and replaced without disturbing operative connections between a valve outlet and/or a valve inlet, in a valve construction including a one-piece valve body.

Abstract: A solenoid valve unit is described for shutting off or enabling a throughflow of a medium along a hollow duct, which flows under application of pressure along the hollow duct, having at least one first magnet unit which is fixedly arranged along the hollow duct, which is implemented in the form of a hollow cylinder and is arranged in an axial section along the hollow duct in such a way that the first magnet unit radially completely surrounds the hollow duct and has a flow opening, which is circular in cross-section, on its downstream end, as well as a second magnet unit, which is mounted so it is movable to the first unit and is implemented as a ball, whose ball diameter is greater than the flow opening diameter of the first magnet unit and which, on account of an attractive magnetic force prevailing between both magnet units, can be brought into indirect or direct contact with the first magnet unit and seals the hollow duct in a fluid-tight manner, while the medium loads the first magnet unit under applicati

Abstract: A valve assembly controls the flow of fluid at very low pressures of about 5 psi or less to and from inflatable chambers. Each valve assembly has a plurality of valves that operate between a closed and an open position. A first conduit or channel directs the fluid to each of the valves; and a plurality of second conduits each associated with one of the plurality of valves communicates with an inflatable chamber. Each of the valves has a valve seat and a valve stem with a head that seats on or with the valve seat to effect a seal in the closed position. The valve stem has a portion positioned to be moved by the solenoid when activated. The separate valves also act as relief valves. A vent valve is also provided and configured to operate between open and closed positions.

Abstract: An automatically adjusting control valve comprises a valve body; a valve seat within the valve body; a sealing disc adjacent the valve seat when the valve is closed and offset from the valve seat when the valve is open; an armature adjacent the sealing disc and operable to move the sealing disc linearly within the valve body; a biasing mechanism which biases the armature toward a first position; and an actuation stem configured to overcome the biasing mechanism and move the armature between the first position and a second position upon manual operation. The actuation stem may comprise a portion which engages the armature during movement between the first position and the second position The portion may be configured to deform to accommodate manufacturing tolerances of the valve.

Abstract: A programmable drive and control assembly (2) for a solenoid valve, in particular for irrigation systems is described. The assembly (2) comprises a drive solenoid (7) for a hydraulic valve (1), a programmable electronic control device (10) for said solenoid (7), and a containment box (8, 23) for said solenoid (7) and said programmable electronic control device (10). The containment box (8, 23) comprises a box-like body (8) removably fixable to said hydraulic valve (1) and an at least partially transparent closing cover (23) screwed at the upper end of said box-like body (8) with the interposition of a fluid-tight annular gasket (25).

Abstract: A hydraulic control valve has a solenoid body, a selectively energizable coil, and an armature positioned adjacent the coil. The coil is energizable to generate a magnetic force that moves the armature from a first position to a second position. A pole piece is positioned to establish a gap between the pole piece and the armature. The pole piece has a cavity that opens at the gap. A piston extends from the armature into the cavity and moves with the armature. The armature is biased to seat at a valve seat in the first position by pressurized fluid. Magnetic force required to move the armature away from the valve seat is a function of the difference between an area of the piston and an area defined by contact of the armature at the valve seat.

Abstract: A valve having a metal insert with a fluid passage formed in the metal insert. A composite valve body is disposed at least partially around the metal insert and having at least one port in fluid communication with the fluid passage with the metal insert. A valve member is partially disposed in the metal insert and operable to control the fluid flow through the fluid passage of the metal insert and parts of the valve body.

Abstract: A pressure pulse generator, including a pressure pulse transmitting body, a chamber, divided into a first and a second part, a first conduit that leads between a high pressure source and the first part of the chamber, a second conduit that leads between a low pressure source and the second part of the chamber, the body being displaceably arranged in the second part of the chamber and being in contact with a pressure fluid in the chamber, and with the environment and being spring loaded in a direction towards the chamber. The pressure pulse generator includes elements for opening/interrupting the communication between the first part of the chamber and the high pressure source, and elements for opening/interrupting the communication between the second part of the chamber and the low pressure source, and an operable valve body for opening/interrupting the communication between the first and second parts of the chamber.

Abstract: A solenoid of a solenoid valve is fixed to a body in direct contact with the body in which a fluid channel is formed. A board is fixed to the solenoid in direct contact with the solenoid.

Abstract: A valve flow-directing vessel (42) comprising a sleeve (44) having a threaded installation portion (84) for connection to a receiving member, a plunger (46) movable within the sleeve (44) between a closed position and an opened position, and an orifice insert (48/50) fixedly attached to the sleeve (44). The orifice insert (48/50) defines an orifice (132) that is sealed when the plunger (46) is in the closed position and unsealed when the plunger (46) is in the opened position. The orifice (132) is the entrance to a passageway (130) having an exit (134) communicating with a delivery passage of the receiving member, and this exit (134) is positioned beyond the threaded installation portion (84) of the sleeve (44).

Abstract: The invention relates to an actuating device, particularly for actuating valves that can be connected externally, comprising a housing (10) and a coil body (12) arranged therein and having a coil winding (14), which encloses a pole tube (16) at least partially, having a pole core (20) connected at the one free end thereof, further comprising an armature (22) that is guided in a longitudinally displaceable manner at least in the pole tube (16) within an armature chamber (24) and interacts with an actuating device (26) for actuating the respective valve part, wherein the actuating part (26) is guided within the pole core (20) along an annular body (92), sealing the inside of the pole core (20) and the pole tube (16) connected thereto relative to the surrounding area.

Abstract: The invention relates to an actuating device, particularly for actuating valves that can be connected externally, comprising a housing (10) and a coil body (12) arranged therein and having a coil winding (14), which at least partially encloses a coil tube (16), having a pole core (20) connected at the free end thereof, further comprising an armature (22) that is guided in a longitudinally displaceable manner at least in the pole tube (16) within an armature chamber (24) and interacts with an actuating pan (26) for actuating the respective valve part, wherein the pole tube (16) is designed as a receiving sleeve for the armature (22), said sleeve being fixed with the free end region thereof to a fixed bearing point, and wherein the fixed bearing point is formed by two support parts (118,124) of the pole core (20) that delimit a receiving gap between them, in which the free end region of the receiving sleeve is fixed in a clamped manner.

Abstract: The invention provides a solenoid actuated valve with a plunger which moves in a sleeve under influence of a magnetic field from the solenoid and further comprising a damping device for reducing noise and wear caused by the plunger when it bounces against a top part located in the sleeve. The damping device comprises a first part which forms the limit of the travel of the plunger and another part which is allowed to move relative to the first part in a dampened movement. To enable application in a vacuum system, the damping device comprises a conduit which allows evacuation of a chamber confined between one end of the sleeve and the damping device. The invention further provides a damper for a solenoid actuated valve.

Abstract: An electromagnetic valve includes an electromagnetic coil module which includes a coiling body defining a receiving passage therein having two opposite end mouths, and a coil coiled around the coiling body. The electromagnetic coil module produces a magnetic field when a current flows through the coil. A slide body is moveably disposed in the receiving passage of the coiling body. Two magnetic conductors are mounted to the corresponding end mouths of the receiving passage of the coiling body respectively. A permanent magnet is embedded in the slide body with two opposite magnetic ends thereof fronting the corresponding magnetic conductors respectively. The permanent magnet under the combined actions of the magnetic attraction of the magnetic conductors and the magnetic field produced by the electromagnetic coil module drives the slide body to relatively move between the magnetic conductors.

Abstract: The present invention provides a liner solenoid portion, comprising: a cylindrical movable core which is attracted toward a fixed core when a coil is energized: and a cylindrical yoke which surrounds an outer circumference surface of the movable core, in which the movable core is not provided with a shaft, a first stopper which limits a displacement of the movable core to a side of a fixed core is pushed into a through hole of the fixed core at one end of the movable core along an axial direction, and a second stopper which limits a displacement in a direction to be spaced apart from the fixed core is held to a bottom surface of a housing by swaging at other end of the movable core along the axial direction.

Abstract: Effective use of energy is provided by recovering energy produced during braking in operation of a rotation motor RM alone for electric generation. A control unit C has functions: of operating a passage-resistance control unit (51) to reduce the passage resistance by a pressure relief valve 50 when determining based on a detection signal from a neutral-condition detecting unit (6, 8, 9, 11 and 16, 18, 19, 21) that all the operated valves 1-5, 12-15 in the circuit system are in the neutral position and a pressure signal from a brake-pressure-detection processor sensor 49 reaches a preset pressure; of causing a tilt-angle control unit 36 to control the tilt angle of a hydraulic motor HM; and of relatively controlling the passage resistance maintained by controlling the passage resistance control unit and the tilt angle of the hydraulic motor to maintain a brake pressure of the rotation motor.

Abstract: In a solenoid on-off valve 20, a main valve body 22 is provided to be displaceable with respect to a housing having a valve passage 55. A seat member 25 is provided at the main valve body 22. The seat member 25 is pressed on a valve seat 34, which divides the valve passage 55 into a primary space 56 and a secondary space 57, to close the valve passage 55. A pilot valve body 23 is coupled to the main valve body 22 so as to be relatively displaceable with respect to the main valve body 22. The pilot valve body 23 is configured to be displaced by an electromagnetic force of an electromagnetic drive unit 24. Further, the solenoid on-off valve 20 is configured such that: the seat member 25 includes a pilot passage 40 connecting the primary space 56 and the secondary space 57; and the pilot valve body 23 is pressed on the seat member 25 to close the pilot passage 40.

Abstract: The invention refers to a solenoid. This comprises at least one armature supported in an armature space. The armature space is encircled by a coil carrying a number of windings which can be loaded with current. The magnetic field generated by it moves the armature against the core. The armature acts on a pin. The armature has on its front seen in the direction of movement a recess in which a structural part is set. The pin is supported on the structural part.