| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 251300010 |
Electrically actuated pilot valve
| 56 |
| 251028000 |
Fluid actuated pilot valve
| 32 |
| 251033000 |
Choked pressure type servo motor
| 11 |
| 251026000 |
Alternative pressure sources or pilot valve | 4 |
| 20090001300 | Directional control valve device and fluid pressure cylinder device - An object is to provide a directional control valve device and a fluid pressure cylinder device using the same that can flow a large quantity of fluid without an additional hydraulic source even if a reciprocating pump is used, and that does not add any constraint on design of the fluid pressure cylinder. A directional control valve device includes a moving valve element that can move in a reciprocating manner, a first passage for connecting the second port (PT | 01-01-2009 |
| 20100019177 | MICROVALVE DEVICE - A microvalve device for controlling fluid flow includes a body defining a chamber having first and second ends. The first end is in communication with a source of command pressure. The second end in communication with a source of load pressure. A micromachined spool valve is disposed in the chamber between the first and second ends for sliding movement by differential pressure across the spool valve between a first position in which allows fluid flow between the source of load pressure and a source of supply pressure and a second position which allows fluid flow between the source of load pressure and a pressure vent. The spool valve has a closed position intermediate the first position and the second position which restricts fluid flow between the source of load pressure and both the source of supply pressure and the pressure vent. The spool valve is moveably connected to the body. | 01-28-2010 |
| 20140353532 | DOUBLE ACTION DIRECTION FLUID FLOW VALVE - A double action directional fluid flow valve includes a stepped piston connected with a poppet valve and moveable by a controller between open and closed positions by applying a continuous pressure to a small diameter piston face and selectively applying and removing pressure from a large diameter piston face to move the poppet valve between an open position and a closed position. | 12-04-2014 |
| 20160186885 | INTEGRATING VALVE WITH SOFT START - A valve includes a modulating chamber for sending and receiving fluid through a first chamber port, a supply chamber, and a damping chamber for sending and receiving a second fluid through a damping chamber port. The valve also includes a passageway between the damping chamber and the supply chamber, and a piston assembly movable within the valve, wherein the piston assembly is configured to open and close a flow control device. The piston assembly includes a rod, a modulating piston attached to the rod movable within the modulating chamber, a supply piston attached to the rod movable within the supply chamber, and a damping piston attached to the rod movable within the passageway and the supply chamber. The piston assembly also includes a damping piston bypass that provides a restricted flow passage between the supply chamber and the damping chamber when the damping piston is located in the passageway. | 06-30-2016 |
| 251031000 |
Double or oppositely acting motor units | 1 |
| 20150144816 | GATE VALVE WITH PNEUMATIC SYSTEM FOR SHEARING APPLICATION - Embodiments of the present disclosure are directed toward a second pneumatic actuator configured to couple to a gate valve, wherein the second pneumatic actuator is configured to apply a supplemental force to a gate of the gate valve, wherein the supplemental force supplements an actuating force of a first actuator of the gate valve. | 05-28-2015 |
| Entries |
| Document | Title | Date |
|---|
| 20090146090 | Pilot Type Water Discharging/Stopping and Flow Regulating Valve Device - A pilot-type water discharging/stopping and flow regulating valve device capable of performing both the discharging/stopping of water and the regulation of flow by light operations, and capable of, once the flow is regulated, discharging the water at a pre-regulated specified flow in the next water discharge even if the water is stopped. | 06-11-2009 |
| 20090294710 | HYDRAULIC SYSTEM - A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position. | 12-03-2009 |
| 20100012868 | SERVO-OPERATED VALVE - A single chamber two-way servo-operated valve comprising: a valve body ( | 01-21-2010 |
| 20100090136 | PRESSURE VAVLE - A pressure valve comprises a valve bush and a control plunger which is movably guided in the valve bush and enables a pressure medium path from a pressure medium source to a consumer via the valve bush to be controlled. A collar section is provided on the control plunger, via which the cross section of a radial opening of the valve bush on the side of the pressure medium source may be modified. The pressure medium path downstream of the radial opening is guided by at least one channel which extends axially through the collar section. The pressure valve also comprises a pilot control system which is used to apply an adjustable control pressure to the control plunger; a control pressure medium supply channel comprising an inlet opening is provided on the control plunger in a region upstream of the collar section. The invention is characterized by the fact that the at least one axially extending channel is dimensioned in such a way that pressure medium may accumulate on the collar section. | 04-15-2010 |
| 20100155629 | PILOT VALVE FOR CONTROL VALVE - A pilot-control valve assembly for a roll control system for a vehicle defines a pressure control valve assembly and includes a main stage valve and a pilot stage valve. A body of the main stage valve is press fit to a body of the pilot stage valve. | 06-24-2010 |
| 20100301238 | BI-DIRECTIONAL OVERPRESSURE SHUT-OFF VALVE - A valve assembly includes a valve body, a valve element, a valve actuator, and a fluid-operated switch. The valve body defines a flow passage. The valve element is disposed at least partially within the flow passage and is moveable between an open position and a closed position. The valve actuator is coupled to the valve element and is responsive to pressurized fluid supplied thereto and vented therefrom to move the valve element between the open position and the closed position, respectively. The fluid-operated switch has a first fluid inlet, a second fluid inlet, a third fluid inlet, an actuator port, and an actuator vent port. The fluid-operated switch is in fluid communication with the valve actuator and is operable to selectively supply pressurized fluid to the actuator via the actuator port, and vent the pressurized fluid from the actuator via the actuator port and the actuator vent port. | 12-02-2010 |
| 20110049400 | ROTARY VALVE ACTUATORS HAVING PARTIAL STROKE DAMPING APPARATUS - Rotary valve actuators having partial stroke damping apparatus are described herein. An example rotary valve actuator described herein includes a housing containing a first piston and a second piston opposite the first piston, where the pistons move in opposite directions to rotate a shaft of the rotary valve actuator. A damper is operatively coupled to at least one of the first piston or the second piston to slow the movement of the piston for only a portion of a stroke of the rotary valve actuator. | 03-03-2011 |
| 20110260081 | DISCHARGE FLOW CONTROL VALVE - A self-regulating valve controls the flow of high pressure gas discharging from a gas cylinder in a fire suppression system in response to a detection of a fire within a protected space by a two-step process which reduces the pressure rise within the protected space upon release of the fire suppression gas into the protected space. | 10-27-2011 |
| 20110266471 | PILOTED MIDDLE-HIGH PRESSURE GATE VALVE - A piloted middle-high pressure gate valve includes a valve stem ( | 11-03-2011 |
| 20120056113 | VARIABLE DISPLACEMENT COMPRESSOR CONTROL VALVE - A variable displacement compressor control valve is provided, which can reduce a time required until a discharge capacity becomes large at a time of actuation of a compressor without reducing an operation efficiency of the compressor. An in-valve release passage for releasing a crank chamber pressure Pc to a suction chamber of the compressor through a Ps inlet/outlet port is provided, a sub valve element which opens and closes the in-valve release passage is provided, and under a situation in which a valve port is closed by a main valve element, two forces that are a force corresponding to a suction pressure Ps (contraction force of a bellows device) and a force corresponding to a differential pressure of the crank chamber pressure Pc and the suction pressure Ps act on the sub valve element in a direction to open the in-valve release passage. | 03-08-2012 |
| 20120056114 | Space-Saving Quick Acting Control Valve For A Steam Turbine - A quick acting control valve for a steam turbine is provided. The quick acting control valve includes a valve box and a control valve cone which is arranged in the valve box so as to be displaceable along its center axis, whereby the control valve cone may be brought into an open position in which the control valve cone, with its control valve cone surface is lifted off the valve box and into a closed position in which the control valve cone rests against the valve box with its control valve cone surface, and a quick acting valve piston which is arranged in the valve box so as to face the back of the control valve cone facing away from the control valve cone surface, the quick acting control valve piston, on its outer peripheral edge, always resting on the valve box in a steam-tight manner. | 03-08-2012 |
| 20120205565 | DAMPENED HYDRAULIC PILOT CONTROL ARRANGEMENT FOR A SPOOL VALVE - A hydraulic pilot control arrangement for a spool valve is provided, wherein the spool of the spool valve is biased towards a central position. The arrangement includes a first and a second pilot hydraulic line connected to opposite sides of the spool of the spool valve and a pilot pressure regulating arrangement is provided for selectively establishing or removing a pilot pressure in each of the first and second lines. The arrangement includes a damping device including a chamber divided into a first and a second pressure compartment by a sliding piston, the first and second pressure compartments being connected respectively to the first and second pilot hydraulic lines, and the piston is biased towards a rest position in the chamber. | 08-16-2012 |
| 20120273700 | VALVE ARRANGEMENT - Exemplary embodiments relate to a valve arrangement for actuating a piston cylinder arrangement, that includes a pilot control valve arrangement and a main control valve arrangement, wherein both the pilot control and main control valve arrangement include a 3/2-way valve as a pilot control valve and as a main control valve. Each valve has a control-pressure, high-pressure, and low-pressure connection. Said connections are connected to each other such that the main control valve is controlled via the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection of the pilot control valve and the pressures on the control-pressure connection and on the high-pressure connection of both valves, are statically inverted relative to each other. The 3/2-way valves are designed as seat valves and are only hydraulically connected to each other. | 11-01-2012 |
| 20120280152 | VALVE ARRANGEMENT - Exemplary embodiments are direct to a valve system for actuating the piston of a piston cylinder arrangement for a hydraulic or fluid device, and for actuating the piston cylinder arrangement for actuating the movable contact piece of a high-voltage circuit breaker. The system including a main control valve arrangement, having two 2/2-way valves used as main valves and which can be controlled by a pilot control valve arrangement. The main control valve arrangement directs a path for the high pressure fluid to the chamber above the piston and connects the chamber to a low-pressure tank for discharging the chamber above the piston. Two 2/2-way valves which form the pilot control valve arrangement are associated with the main control valve arrangement such that the 2/2-way valves direct or supply either a high-pressure control pressure or a low-pressure control pressure to the main control valve arrangement. | 11-08-2012 |
| 20130056657 | LATCH VALVE FOR ACTUATING A TRANSMISSION CONTROL ELEMENT - A latch valve includes a first port containing line pressure, a second port containing control pressure, a third port located between the first and second ports, alternately connecting the first and second ports to a transmission control element, and a fourth port containing control pressure that tends to close the second port and open the first port in opposition to a spring force. | 03-07-2013 |
| 20130187068 | GUIDING DEFORMATION IN SEATED HYDRAULIC METERING DEVICES - A hydraulic valve arrangement includes a manifold and a poppet. The manifold defines a bleed ring that surrounds a bore and has an angled surface. The manifold also defines an annular recess around the bleed ring that provides a relief region. The poppet is slidably disposed within the bore and is structured to close a main flow path between the first and second ports when the poppet is in a first position and the poppet being structured to at least partially open the main flow path when the poppet slides away from the first position. The poppet defines an angled contact surface that is configured to engage the angled contact surface of the bleed ring when the poppet is in the first position. | 07-25-2013 |
| 20140117263 | PNEUMATIC DRIVE SYSTEM AND METHOD FOR OPERATING THE PNEUMATIC DRIVE SYSTEM - In a method or device for operating a pneumatic drive system for actuating a control valve, a pneumatic working chamber is loaded with pneumatic pressure in order to move the control valve into a desired position. At least two pneumatic control signals are supplied to the working chamber by means of electropneumatic conversion | 05-01-2014 |
| 20140284507 | AUXILIARY VALVE CONTROLLED SELF-CLEANING MAIN VALVE - Auxiliary valve controlled self-cleaning main valve with mechanical operating means. The valve body ( | 09-25-2014 |
| 20150041688 | ELECTRO-HYDRAULIC SYSTEM FOR DRIVING LARGE-SCALE ROTARY MOTION VALVE SUPPLIED BY SOLAR LOW-CAPACITY POWER - An electro-hydraulic system for driving a large-scale rotary motion valve supplied by a solar low-capacity power. A step motor ( | 02-12-2015 |
| 20150069276 | ACTUATOR - An actuator for actuating a plunger of a valve is provided. The actuator has an inlet and includes first and second hollow caps. A main actuation assembly is provided between the caps. The main actuation assembly includes a deformable diaphragm; first and second chambers, static sealing elements and a main piston movable between actuated and unactuated positions. A biasing mechanism biases the piston in the unactuated position. When pressurized gas is flown through the inlet and/or drawn from the outlet of the actuator, the first chamber expands, moving the main piston from the unactuated position to the actuated position, an actuating stem connected to the main piston thereby sliding within a channel provided in the bottom cap. Stackable actuating assemblies can also be used between the caps. Using static sealing elements advantageously avoids friction between moving parts. | 03-12-2015 |
| 20150144815 | CLOG RESISTANT VALVE PORT AND METHODS RELATING TO SAME - An irrigation valve has a valve body with an inlet passage, an outlet passage, a valve seat intermediate the inlet passage and the outlet passage and a control chamber exit or bypass passage terminating in a surface that defines a portion of the outlet passage, the valve body including at least one of a recess and a rib for hindering clogging of the bypass passage. Related methods for hindering clogging of the control chamber or exit bypass passage are also disclosed. | 05-28-2015 |
| 20150354722 | ACTUATOR - An actuator for actuating a plunger of a valve is provided. The actuator has an inlet and includes first and second hollow caps. A main actuation assembly is provided between the caps. The main actuation assembly includes a deformable diaphragm; first and second chambers, static sealing elements and a main piston movable between actuated and unactuated positions. A biasing mechanism biases the piston in the unactuated position. When pressurized gas is flown through the inlet and/or drawn from the outlet of the actuator, the first chamber expands, moving the main piston from the unactuated position to the actuated position, an actuating stem connected to the main piston thereby sliding within a channel provided in the bottom cap. Stackable actuating assemblies can also be used between the caps. Using static sealing elements advantageously avoids friction between moving parts. | 12-10-2015 |
| 20160025177 | DAMPING VALVE - A damping valve includes a valve seat member provided with a port, a valve body that opens or closes the port, a tubular spool that abuts on a side of the valve body opposite to the valve seat member, a spool holding member that has an outer circumference where the spool is mounted movably along an axial direction, a ring mounted to the outer circumference of the spool holding member, the ring contacting slidably with an inner circumference of the spool, and a back-pressure chamber partitioned by the spool and the spool holding member, the back-pressure chamber being configured to bias the spool such that the valve body is pressed toward the valve seat member using an internal pressure, wherein the internal pressure of the back-pressure chamber is applied to an inner circumferential side of the ring. | 01-28-2016 |
| 20160025178 | DAMPING VALVE - A damping valve includes a valve seat member having a port and a first valve seat surrounding the port, a main valve body seated on or unseated from the first valve seat, the main valve body having a second valve seat oppositely to the valve seat member, a subsidiary valve body seated on or unseated from the second valve seat, a valve-body intermediate chamber provided between the main valve body and the subsidiary valve body in an inner circumferential side of the second valve seat, a restrictive passage that causes the port and the valve-body intermediate chamber to communicate with each other, the restrictive passage being configured to apply resistance to a flow of fluid passing therethrough, and a subsidiary valve body biasing means configured to bias the subsidiary valve body toward the main valve body. | 01-28-2016 |
| 20160069468 | VACUUM VALVE - Some embodiments of the invention relate to a vacuum valve having at least one piston/cylinder arrangement for adjusting a first closure member between a first, a second, and a middle closure member position. In some embodiments, the piston/cylinder arrangement which is coupled mechanically to the first closure member has a cylinder unit and a piston unit. A first seal body and a second seal body can be displaced independently of one another axially relative to the cylinder unit and to the piston unit. A first axial stop of the cylinder unit and a third axial stop of the piston unit are arranged relative to one another such that, in the middle closure member position, the axial movability of the first seal body in the direction of a second pressure chamber is limited jointly by the first axial stop and the third axial stop. | 03-10-2016 |
| 20160091097 | PRESSURE REDUCING VALVE - In a pressure reducing valve, a piston is disposed in a piston slide hole of a body so as to be displaceable along an axial direction thereof. An o-ring is disposed through a second annular groove on an outer circumferential surface of the piston. First and second wear rings are disposed respectively in first and third annular grooves, which are distanced from the second annular groove respectively above and below with respect to the second annular groove. A distance along the axial direction between the first annular groove or the first wear ring and the second annular groove or the o-ring, and a distance along the axial direction between the third annular groove or the second wear ring and the second annular groove or the o-ring are set, respectively, to be greater than a stroke distance of the piston along the axial direction. | 03-31-2016 |
| 20160161018 | PILOT-OPERATED VALVE - Provided is a valve having a movable valve member with an orifice, a plunger movable to block/allow flow through the orifice, and a resilient biasing member for resiliently biasing the valve member away from the valve seat. When the plunger is moved to a position allowing flow, fluid flows through the orifice creating a pressure differential in the valve that in combination with the resilient biasing member moves the valve member to a position allowing flow through a main passageway of the valve. During a low or no flow condition, the valve member is held in the position allowing flow to prevent a drop in performance of a system utilizing the valve that would result if the valve member moved to a blocking position. | 06-09-2016 |
| 20160169217 | STARTING VALVE FOR A FLUID OPERATING MACHINE WORKING IN A VACUUM SYSTEM | 06-16-2016 |
