| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 137625600 | Pilot-actuated | 40 |
| 20090014076 | BLEED VALVE APPARATUS - A bleed valve apparatus includes a valve body having a sliding hole in which a spool is axially movable. A seat member and the spool define a bleed chamber. An open-close unit opens and doses a bleed port of the seat member to control exhaust of fluid from the bleed chamber through the bleed port. The spool has a spool end surface at the side of the seat member. The spool end surface and a seated surface of the seat member are inclined with respect to each other to therebetween define an inclination clearance, which communicates a supply port with the bleed chamber to supply fluid to the bleed chamber through the supply port when the spool is seated to the seated surface. | 01-15-2009 |
| 20090020178 | VALVE PART OF A HYDRAULIC CONTROL VALVE - A valve part of a hydraulic control valve for controlling flows of pressurized medium is provided. The valve part includes: a cylindrical valve housing with a valve housing hollow space that is open on one side in the axial direction, wherein the valve housing is provided with a radial first work connection (A), a radial second work connection (B), and a radial pressure connection (P), each of which opens into the valve housing hollow space, and a cylindrical control piston is held in the valve housing hollow space so that it can move in the axial direction with a control piston hollow space that is open on one side at an axial control piston hollow space opening. The control piston is provided with a radial discharge connection (T) opening into the control piston hollow space, and the control piston is constructed in such a way that the work connections (A, B) can be connected selectively in a fluid conducting way to the pressure connection (P) and the discharge connection (T) through axial displacement of the control piston. The valve part distinguishes itself in that a cover provided with at least one cover opening is attached to the axial control piston hollow space opening. | 01-22-2009 |
| 20090107568 | Apparatus Operating Hydraulic Actuator for Valve - The present invention relates to an apparatus operating a hydraulic actuator for valve, which can manually operate the hydraulic actuator for opening and closing the valve by which a flow rate is adjusted. According to the present invention, by manually operating the hydraulic actuator for opening and closing the valve, there is an advantage of manually opening and closing the valve and thus easily adjusting a flow rate of fluid flowing in a pipe, even when power is cut off. Further, according to the present invention, the hydraulic actuator for opening and closing the valve can be selectively connected with a hydraulic power pack so as to automatically open and close the valve using the hydraulic power pack according to a user's selection, or which can manually open and close the valve. | 04-30-2009 |
| 20120216895 | FLUID FLOW CONTROL DEVICE - A fluid flow control device has an inlet, an outlet and an exhaust port all for an operating fluid. A pilot inlet receives a pilot pressure signal which operates a valve stem actuator via a piston. The valve stem is operable to open a supply valve between the inlet and outlet and, to open an exhaust valve disposed between the outlet and the exhaust. In a further position both the valves are closed. A first fluid leak path is provided between the valve stem and the supply valve for allowing fluid to leak through the supply valve chamber when the supply valve is open and a second fluid leak path is defined by the exhaust valve for allowing fluid to leak through the exhaust valve chamber. The leak paths provide for a force balancing arrangement. A quick exhaust feature allows exhaust flow through the device. | 08-30-2012 |
| 20120234416 | Pilot Regulator - A pilot regulator system includes a housing having a fluid inflow port, a ball valve to regulate fluid flow among two fluid outflow ports, two regulator outputs each associated with one of said two fluid outflow ports, and a regulator selection aperture. An extension portion, generally horizontal to the regulator outputs, is connected to the regulator selection aperture, and includes an open end for access to a selection member that can be moved between two positions to select fluid flow to one of two regulator outputs. The extension portion also has a groove and the selection member has an extension extending through the groove so as to be movable by either the extension or the selection member itself. The extension portion has an expansive cross-sectional element to guide a remote vehicle to the selection member for movement thereof. | 09-20-2012 |
| 20130081725 | TIME DELAY VALVE - An on-off valve ( | 04-04-2013 |
| 20130105014 | ADJUSTABLE PILOT-ACTUATED VALVE | 05-02-2013 |
| 20130206260 | SERVO-VALVE PILOT STAGE AND A TWO-STAGE SERVO-VALVE INCLUDING SUCH A STAGE - A pilot stage for a jet type servo-valve, the pilot stage including an ejector for ejecting a jet of fluid and that is movable facing a deflector suitable for generating a pressure difference that can be used for moving a spool of the servo-valve. The ejector extends radially projecting from a column to which the ejector is secured and is in fluid-flow communication with a central bore of the column through which the ejector is fed with fluid, the column having a first end that is embedded in the servo-valve and through which the fluid is introduced into the column, and the column has a second end that is subjected to drive from a torque motor for selectively twisting the column in one direction or the other about a rest position. | 08-15-2013 |
| 20130248032 | HYDRAULIC PILOT VALVE ARRANGEMENT AND HYDRAULIC VALVE ARRANGEMENT HAVING THE SAME - A hydraulic pilot valve arrangement for pilot-controlling a valve includes at least one pilot valve configured to be activated electromagnetically in a pulse-width-modulated fashion. The pilot valve is configured to be activated ballistically or inversely ballistically. A hydraulic valve arrangement including the hydraulic pilot valve arrangement also has a valve configured to be pilot-controlled by the pilot valve arrangement. | 09-26-2013 |
| 20130255809 | Valve, In Particular Pilot-Operated Proportional Pressure Control Valve - A valve, in particular a pilot-operated proportional pressure control valve, with a valve housing ( | 10-03-2013 |
| 20150013805 | CHANGE-OVER VALVE - A change-over valve comprises a spool housed in a spool housing, and a pilot chamber facing at least an end of the spool. An axial passage is formed in the spool along the axial direction. While being connected to a pilot chamber, the axial passage communicates with a tank passage via a small hole having an opening on an outer periphery of the spool in accordance with displacement of the spool, to discharge the air in the pilot chamber to the tank passage. Since the axial passage is formed at a location offset from a center axis of the spool, a length of the small hole is shortened and the small hole is easily processed. | 01-15-2015 |
| 20150090354 | Pilot-Operated Spool Valve - A pilot-operated spool valve includes a body defining a bore. A supply port and a load port are in fluid communication with the bore. A spool is disposed in the longitudinal bore, and the spool and the body cooperate to define a command chamber at a first end of the spool, which command chamber is adapted to receive fluid at a command pressure supplied to the body. The spool is movable in the bore to control fluid communication between the supply port and the load port. A pressure space is defined in at least one of the body and the spool between the command chamber and both of the supply port and the load port in all operative positions of the spool. The pressure space is supplied with pressurized fluid such that leakage from the command chamber is minimized or eliminated. | 04-02-2015 |
| 137625610 | Variable orifice-type modulator | 1 |
| 20080257433 | BLEED VALVE APPARATUS - A seat member forms a bleed chamber between a spool and the seat member and has a bleed port communicated with a low pressure side. The spool is seatable against a seat of the seat member, which is formed around the bleed chamber, to disable substantial communication between the bleed chamber and a supply port, which supplies oil to the bleed chamber. An opening and closing valve plug is seatable against another seat of the seat member, which is formed around the bleed port, to close the bleed port. A push member is placed between the spool and the valve plug. When a solenoid actuator applies a drive force to the valve plug, the push member is driven by the valve plug to directly push the spool and thereby to lift the spool away from the seat of the seat member. | 10-23-2008 |
| 137625630 | Common to plural valve motor chambers | 2 |
| 20100006165 | HYDRAULICALLY ACTUATED PNEUMATIC REGULATOR - A hydraulically actuated pneumatic regulator is configured to receive hydraulic fluid from a hydraulic source and pressurized air from a pressurized air source to control air pressure downstream of the pneumatic regulator. The hydraulically actuated pneumatic regulator includes a valve element, an actuator, and pneumatic-to-hydraulic servo. The actuator is adapted to receive one or more pneumatic control signals supplied by the pneumatic-to-hydraulic servo, and is operable, in response to the pneumatic control signals, to control the air pressure downstream of the pneumatic regulator. | 01-14-2010 |
| 20130233423 | SYSTEM AND DEVICE FOR OVER-SPEED PROTECTION OF A TURBO-MACHINE - This disclosure describes embodiments of a system and device to prevent damage that can occur during an over-speed condition in a turbo-machine. The embodiment includes a fluid circuit with a header, which couples to the turbo-machine, and a hydraulic circuit through which fluid can evacuate the header to a drain. The hydraulic circuit includes a trip header manifold with a pilot element in flow connection with a drain valve element that has an actuator to regulate the flow of fluid from the header. In one example, the pilot element uses solenoid valves to change the pressure of a fluid in the drain valve element and, in particular, maintains the actuator in a first position to prevent fluid to evacuate during normal operating conditions at the turbo-machine. When the over-speed condition occurs the actuator moves to a second position to place the header in flow connection with the drain. | 09-12-2013 |
| 137625640 | Electric | 25 |
| 20080257434 | Hydraulic Control System for High Flow Applications in Motor Vehicles - A hydraulic control system for high flow applications in motor vehicles, in particular for active wheel suspensions and active steering arrangements, includes at least one passive high flow valve which is controlled hydraulically by at least one low flow valve. | 10-23-2008 |
| 20090114298 | VALVE CONTROL UNIT - A valve control unit that prevents a decline in interlocking operation performance when pilot pressure control of a plurality of pilot-operated control valves is carried out by proportional solenoid valves. First and second proportional solenoid valves include a Common Operation Table of lever operation amount/boom-up pilot pressure characteristics and are inputted with a common boom-up lever operation amount. A third proportional solenoid valve also includes the Operation Table and is inputted with a stick-in lever operation amount common to the fourth proportional solenoid valve. The fourth proportional solenoid valve includes an Operation Table of lever operation amount/stick-in pilot pressure characteristics different from that of the first, second, and third proportional solenoid valves and is inputted with the stick-in lever operation amount common to the third proportional solenoid valve. | 05-07-2009 |
| 20090120521 | Solenoid Actuated Pilot Valve for Irrigation System Valve - A solenoid actuated pilot valve includes a pilot valve housing defining a pilot valve chamber and a solenoid. The solenoid includes and end cap connected to the pilot valve housing, a reciprocable plunger, and a piston having a shaft with a first end connected to and end of the plunger and a second end connected to a piston head. The end cap has a bore through which the shaft of the piston reciprocates and a first port separate from the bore. A first seal on a first side of the piston head is provided for sealing a first end of the first port. A second seal on a second side of the piston head is provided for sealing a first end of a second port in the pilot valve housing. | 05-14-2009 |
| 20090159143 | FLUID PRESSURE CIRCUIT - A fluid pressure circuit that can, in either case where a first actuator that is fed from a first pump or a second actuator that is fed from a second pump is operated, by allowing feeding of the hydraulic fluid to a specific actuator from either the first or second pump, improve interlockability with the specific actuator. A control valve is incorporated with a plurality of first-group spools fed from a drive pump and a plurality of second-group spools fed from an idle pump. A solenoid selector valve unit switches a pilot line of a second-group tool controlling spool to a communicating state at the time of detection of a spool operation by a first pressure switch and switches a pilot line of a first-group tool controlling spool to a communicating state at the time of detection of a spool operation by a second pressure switch. | 06-25-2009 |
| 20090301588 | Solenoid valve - A valve section that functions as a solenoid valve device that includes a pressure adjusting section that adjusts fluid pressure supplied from a fluid pressure source; a pump section that sucks and discharges working fluid in a reservoir; and a single solenoid section that drives the pressure adjusting section and the pump section. | 12-10-2009 |
| 20100139795 | DIRECT-ACTING PILOT PRESSURE CONTROL SOLENOID - The present invention is directed to a solenoid valve having a valve body with a fluid passage extending at least partially through the valve body. A supply port is disposed through the valve body and is operably connected to the fluid passage. The supply port introduces fluid medium from, such as hydraulic fluid, transmission fluid or some other suitable fluid from a pressure source such as a pump. A control port is also disposed through the valve body and is operably connected to the fluid passage. An exhaust port is also disposed through the valve body and is operably connected to the fluid passage. Between the control port and the supply port and the exhaust port there is a valve member that is operably disposed in the fluid passage. This is accomplished by way of a bore extending at least partially through the valve member. A metering orifice connects the fluid passage or exhaust port with the bore of the valve member. | 06-10-2010 |
| 20100163128 | HYDRAULIC DIRECTIONAL VALVE - A hydraulic directional valve having an electromagnetic actuating unit and a valve section, an essentially cylindrical, blind hole-like receptacle being formed on one component of the actuating unit, a flange section of a valve housing of the valve section engaging in the receptacle, the flange section being provided with an angular groove which extends in a circumferential direction, and an essentially hollow cylindrical wall of the receptacle in the region of the annular groove engaging in said annular groove in such a way that it bears on the groove base of the annular groove, along the entire circumference of said annular groove. The torsional rigidity between the flange section and the wall is increased. In this context, particular emphasis is placed on processing reliability and economic viability of the connecting process. | 07-01-2010 |
| 20100200090 | Spool Valve - Two stage spool valves having, in a single assembly, a first stage spool and a second stage spool. The first stage spool may have a solenoid actuator with a return spring, with the second stage spool having either a hydraulic return or a spring return, or both. The solenoid actuator may be comprised of a stationary structure defining a magnetic flux path, including a stationary structure pole face, that together with a moveable structure, including a moveable structure pole face, define a substantially zero air gap magnetic circuit when the solenoid actuator is actuated, the pole faces of the stationary structure and the moveable structure each being defined in part by soft magnetic iron and in part by hardened steel, the hardened steel of the moveable structure contacting the hardened steel of the stationary structure and the soft magnetic iron of the moveable structure being face to face with the soft magnetic iron of the stationary structure when the solenoid actuator is actuated. | 08-12-2010 |
| 20100218836 | DIRECTLY PILOTED VALVE ASSEMBLY - A directly piloted valve assembly has a valve body including a bore, at least one inlet port, at least one outlet port and at least one exhaust port or second outlet port wherein the ports are all in fluid communication with the bore. A spool is received in the bore. The spool includes a wall defining a lumen. An actuator is received in the lumen. The actuator includes a shuttle seal channel. A shuttle seal is received in the shuttle seal channel. A solenoid is connected to the valve body. The wall of the spool includes at least one pilot hole in fluid communication with the lumen defined by the spool and the bore of the valve body. | 09-02-2010 |
| 20100313980 | Solenoid valve apparatus - A solenoid valve apparatus includes a solenoid valve and a switching device that switches between a first state in which the working fluid in the pump chamber is discharged when the solenoid valve functions as a regulator valve and a second state in which discharge of the working fluid from the pump chamber is prohibited when the solenoid valve functions as the electromagnetic pump. | 12-16-2010 |
| 20100313981 | Proportional Position Feedback Hydraulic Servo System - A system for positioning a device such as a valve with a mechanical input using a fluid operated actuator, a mechanical position feedback member coupled to a feedback element of the fluid operated actuator and an activation fluid valve. The fluid operated actuator has an output coupled to the mechanical input of the valve, a feedback element for mechanically indicating a position of the valve, and inputs for actuating fluid, such that fluid at the inputs causes the fluid operated actuator to move in opposing directions. The activation fluid valve has outputs coupled to the inputs of the fluid operated actuator, a first opposing force input coupled to the mechanical position feedback member and a second opposing force input coupled to a control input force. The position of the activation fluid valve is controlled by a balance between the force from the mechanical feedback member and the control input force. | 12-16-2010 |
| 20100326552 | SOLENOID VALVE - In a solenoid valve, multiple flow-blocking portions are formed in a passage between a supply port ( | 12-30-2010 |
| 20110083763 | PRESSURE CONTROL VALVE - A pressure control valve is provided, which can variably control the set pressure of the pressure control valve through manipulation of a signal pressure generation device in an operator's seat or the like. The pressure control valve includes a sleeve having an inlet port and a through hole, a poppet slidably coupled in the sleeve, a poppet spring, a pilot poppet draining the hydraulic fluid in a pressure chamber to the hydraulic tank, a valve seat on which the pilot poppet is seated, a pilot poppet spring, a plug coupled to the sleeve, a guide coupled to the plug, a main piston variably adjusting the set pressure of the pressure chamber, a first stopper supporting the pilot poppet spring, a second stopper limiting the movement of the main piston within a predetermined section when the pilot signal pressure passing through the through hole of the guide presses the main piston, an adjustment plug adjusting the set pressure of a spring elastically supporting the main piston, and an adjustment screw adjusting an amount of movement of the main piston by pressing the second stopper when the pilot signal pressure is supplied to the main piston so that pressure in a low-pressure section can be finely controlled. | 04-14-2011 |
| 20110232791 | PROPORTIONAL VALVE EMPLOYING SIMULTANEOUS AND HYBRID ACTUATION - Disclosed is an exemplary valve having a first valve member that may include at least one orifice, and which is moveable between a first position and a second position, and a second valve member that includes at least one orifice, and which is moveable relative to the first valve member between a first position, in which the at least one orifice of the second valve member is fluidly disconnected from the at least one orifice of the first valve member, and a second position, in which the at least one orifice of the second valve member is fluidly connected to the at least one orifice of the first valve member. The exemplary valve may also include first and second actuators for moving the first and second valve members between their respective first and second positions. | 09-29-2011 |
| 20120216896 | SERVO VALVE - It is an object to provide a servo valve that can be manufactured at low cost by simplifying adjustment of the relative position between a nozzle and a flapper and simplifying the configuration of a valve-element driving circuit. Provided is a servo valve ( | 08-30-2012 |
| 20120285568 | VALVE DEVICE - The invention relates to a valve device comprising a valve housing ( | 11-15-2012 |
| 20120291900 | SOLENOID VALVE AND OIL PRESSURE CONTROL DEVICE - A solenoid valve has a linear solenoid, a common cylindrical sleeve, one axial end of which is fixed to the linear solenoid, and a common spool movably accommodated in the sleeve, and a return spring. The solenoid valve further has a first three-way valve formed by a first portion of the sleeve and a first portion of the spool for operating as a normally-closed type valve, and a second three-way valve formed by a second portion of the sleeve and a second portion of the spool for operating as a normally-opened type valve. | 11-22-2012 |
| 20130276925 | PRESSURE REGULATING DEVICE WITH DETECTION OF THE NEUTRAL POSITION - The present invention relates to a pressure regulating device ( | 10-24-2013 |
| 20140007964 | PROPORTIONAL PRESSURE-REGULATING VALVE - The invention relates to a proportional pressure-regulating valve ( | 01-09-2014 |
| 20140318652 | VALVE BLEED SYSTEM - A valve control unit is connected to a control valve and automatically moves a valve spool first and second bleed positions. The control unit prevents valve bleed if the control valve is in its extend or retract position under command of the operator. The control unit prevents a valve bleed if a temperature of oil in the reservoir is not less than a reference temperature. The control unit prevents a valve bleed if a speed of the vehicle is less than a reference speed. The control unit automatically returns the spool to its neutral position from the first and second bleed positions. | 10-30-2014 |
| 20150020905 | VALVE ASSEMBLY HAVING DUAL FUNCTIONALITY FOR DIRECTIONAL CONTROL OF A PISTON ON A FLUID ACTUATED DEVICE - Embodiments of a directional valve assembly that provides a single device with functionality of a two-position design for automated operation and functionality of a three-position design for manual operation. The embodiments can include a housing with a piston chamber and a spool member that transits in the housing to regulate the flow of a working fluid to a cylinder. The embodiments can also have one or more pilot operators that regulate the flow of pilot air into the piston chamber to move the spool member between two positions, i.e., two open positions. The embodiments can also have a manual operator (e.g., a lever) that can move the spool to the open positions and to a closed position. In one embodiment, the spool member is configured to remain in either a first position, a second position, or a third position in the absence of an outside stimulus on the pilot operators. | 01-22-2015 |
| 20150047731 | EXTERNALLY FITTED CONTROL DEVICE AND HYDRAULIC CONTROL MODULE FOR AN EXTERNALLY FITTED CONTROL DEVICE - The externally fitted control device includes an electronic control module ( | 02-19-2015 |
| 20150059898 | DOUBLE SOLENOID VALVE WITH DETENT MECHANISM - A detent mechanism that increases a holding force for the valve member having two switch positions when the valve member is in each of the switch positions includes a ring shaped housing groove which is formed on one of an inner periphery of the valve hole and an outer periphery of the valve member and an annular elevated portion which is formed on the other, and a ring shaped detent member housed in the housing groove, the housing groove includes right and left groove side walls which extend in parallel to each other, and a groove bottom wall, the detent member is made of a material having rubber elasticity and includes right and left side walls which face the groove side walls of the housing groove, and a protruding portion which extends from the housing groove, and a locking section which elastically locks the protruding portion of the detent member in the two switch positions is formed on both ends of the elevated portion in the axis direction. | 03-05-2015 |
| 20150096636 | ENGINE VALVETRAIN OIL CONTROL VALVE - An oil control valve assembly includes a valve body and a controller coupled to an exterior end of the valve body. The controller includes a solenoid housing attached to the exterior end of the valve body, and defines an interior region. An encapsulated coil assembly is disposed within the interior region of the solenoid housing. A housing seal is disposed within the interior region of the solenoid housing, in sealing engagement with the solenoid housing, the valve body, and the encapsulated coil assembly. The housing seal is operable to seal the interior region of the solenoid housing to prevent fluid communication between the solenoid housing and the valve body. An adapter assembly is coupled to the valve body to reposition a discharge location of a supply port, a control port, and an exhaust port of the valve body along a longitudinal axis of the valve body. | 04-09-2015 |
| 20150129070 | METHODS AND APPARATUS TO BIAS SPOOL VALVES USING SUPPLY PRESSURE - Methods and apparatus to bias spool valves using supply pressure are disclosed. An example apparatus includes a housing of a spool valve, the housing including a first port to receive a fluid at a supply pressure. The example apparatus further includes a spool within the housing. A position of the spool is to be selectively controlled via an input force acting on the spool, the position of the spool to define a path of a flow of the fluid through the spool valve from the first port to a second port of the housing. A biasing force is to bias the spool opposite the input force, the biasing force to be generated from the supply pressure applied to an end of the spool. | 05-14-2015 |
