| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 137492000 | Single acting fluid servo | 20 |
| 20120085437 | Volume Booster With Seat Load Bias - A fluid flow control device includes a trim cartridge, a diaphragm assembly, and a control element. The trim cartridge defines a cartridge supply port and an upper planar surface. The cartridge supply port is disposed along a supply path of the volume booster and the upper planar surface is disposed along an exhaust of the volume booster. The diaphragm assembly defines an exhaust port on the exhaust path. The control element is movably disposed in the trim cartridge and includes a supply plug, an exhaust plug, and a stem. The supply plug engages the cartridge supply port and the exhaust plug engages the exhaust port. The exhaust plug further includes a lower planar surface that is coplanar with the upper planar surface of the trim cartridge. | 04-12-2012 |
| 20120160345 | VALVE UNIT FOR CONTROLLING THE DELIVERY OFA COMBUSTIBLE GAS, IN PARTICULAR FOR DELIVERY VIA A GAS METERING APPARATUS, AND GAS METER INCLUDING SAID VALVE UNIT - A valve unit for controlling the delivery of a combustible gas, in particular for delivery via a gas metering apparatus including a main gas through-flow pipe ( | 06-28-2012 |
| 20130167951 | HYDRAULIC DRIVE FOR A PRESSURE BOOSTER - Hydraulic drive and method for driving a pressure booster of a high-pressure apparatus. The hydraulic drive includes a pressure medium pump having one of a constant displacement pump and a pump conveying a constant volume per revolution, a servo motor coupled to drive the pump, and a controller structured to at least one of electrically control, regulate and switch the servo motor, which is arranged on at least one of a low pressure side and a high pressure side of the pressure booster. | 07-04-2013 |
| 20140124059 | VALVE ASSEMBLY - A valve assembly is provided and includes a poppet disposed to regulate a pressure of a fluid flowing through a pathway defined between the poppet and a valve body, a drive element configured to modulate a pressure of a servo fluid to thereby control a position of the poppet relative to the valve body and an actuator body coupled to the poppet and configured to deliver a supply fluid to the drive element from a first cavity defined between the poppet and the actuator body and to deliver the servo fluid from the drive element to a second cavity defined between the actuator body and the poppet. The poppet defines a filter through which fluid flows from the pathway into the first cavity as the supply fluid. | 05-08-2014 |
| 20150034179 | Flow Control System and Control Valve Having Closure Assistance - A control valve includes a piston-housing having a hollow portion. The hollow portion has a first end, an open end, first and second internal chambers, and a fluid port configured to allow fluid to exit the second chamber. The first chamber is nearer the first end, and the second chamber is nearer the open end. A piston is located within the housing and is adapted for reciprocal motion. The piston includes a first and second seal-engaging portions. The first seal-engaging portion has a diameter that is less than the diameter of the second seal-engaging portion. | 02-05-2015 |
| 137492500 | Spring biased | 15 |
| 20080196773 | Ventline control valve assembly - A valve assembly includes a valve body, a primary valve, and a pilot valve. The valve body includes an inner surface that forms a chamber, a first inlet receiving fluid from a first source and having a port fluidly communicating with the chamber, a restriction orifice receiving fluid from the first source, a second inlet receiving fluid from a second source, a vent outlet line, and an outlet. The primary valve moves between an open position, in which the port and restriction orifice fluidly communicate with the outlet, and a closed position, in which the restriction orifice, but not the port, fluidly communicates with the outlet. The pilot valve moves in response to a differential pressure between the first and second sources, between a first position, in which the chamber fluidly communicates with the vent orifice, and a second position, in which the chamber fluidly communicates instead with the second source. | 08-21-2008 |
| 20090020170 | AIR PRESSURE REGULATOR WITH FLOW SENSOR - A combination air regulator and sensor assembly includes a head including a first chamber having an inlet and an outlet. A regulator dome including a second chamber is linked with the first chamber through a bore. The second chamber includes at least one outlet. A valve assembly is housed within the bore and moveable between closed and open positions sealing and allowing flow in the bore. A first diaphragm is positioned in the second chamber and linked with the valve assembly. The valve assembly moves in response to a pressure applied to the first diaphragm. A spring contacts the first diaphragm and applies a biasing force to the first diaphragm. A sensor dome including a third chamber is linked with the outlet of the second chamber. The sensor chamber includes a discharge outlet. A second diaphragm is positioned in the sensor chamber. The second diaphragm includes a rubber disk having a conductive contact ring attached on one side of the rubber disk and a non-conductive cup washer attached on the same side of the disk. The cup washer includes a hole formed there through allowing passage of air between opposing sides of the second diaphragm. A sensor spring contacts the second diaphragm and applies a biasing force to the second diaphragm. Electrical contacts are attached to the sensor chamber. The electrical contacts selectively engage the contact ring and are responsive to a differential pressure of the second diaphragm to define an electrical switch. | 01-22-2009 |
| 20090314359 | PILOT-CONTROLLED PRESSURE LIMITING VALVE - A pressure limiting valve has a control element ( | 12-24-2009 |
| 20110061749 | CONTROL VALVE - A control valve capable of performing capacity control independent of the pressure of operation fluid and according to preset conditions. The control valve opens and closes a first poppet valve and a second poppet valve by a solenoid section where a solenoid rod is moved according to the magnitude of an electric current. In the control device, the following pressure-receiving areas are set to be substantially equal to each other: the first effective pressure-receiving area of a first pressure-sensing spring device forming the first poppet valve and the second poppet valve, the second effective pressure-receiving area of a second pressure-sensing spring device, the first pressure-receiving area on the inner side of a portion where a first valve seat surface and a first valve section surface are in contact with each other, and the second pressure-receiving area on the inner side of a portion where a second valve seat surface and a second valve section surface are in contact with each other. | 03-17-2011 |
| 20110146813 | TAMPER-RESISTANT VALVE AND CONNECTION ARRANGEMENT - A gas cylinder valve | 06-23-2011 |
| 20110272044 | MULTI-MODE PRESSURE RELIEF VALVE - A multi-mode pressure relief valve includes a body having fluid inlet and outlet ports and a compressed gas inlet port. The fluid ports and gas port isolated from one another. A reciprocating piston is in communication with the gas port. A valve stem is movable between an open condition and a closed position to permit and stop flow communication between the fluid ports. A spring is disposed between the valve stem and the piston and urges the piston and valve stem away from one another. The valve is operable in at least three modes, an operating mode in which the valve is open, the stem is spaced from the piston, and the piston applies pressure on the stem, and in which the pressure is balanced by fluid pressure the inlet, a zero-state mode in which the valve is open, the stem is spaced from the piston, the spring is in a relaxed state, and the piston applies no pressure on the valve stem, and a relief mode in which the valve is open, the stem contacts or is in close proximity to the piston and the spring is in a compressed state due to the fluid pressure. | 11-10-2011 |
| 20120180879 | SOLENOID VALVE - A solenoid valve for controlling a fluid has a first housing part ( | 07-19-2012 |
| 20130312849 | PRESSURE CONTROL VALVE WITH PRESSURE CYCLING CONTROL - A spool valve includes a housing having a spring-enclosing portion and a spool-enclosing portion aligned along a longitudinal axis. A spool is mounted for reciprocal axial movement in the housing and a piston is fixed to one end of the spool. The spool-enclosing portion supports a stationary bushing having a bore receiving an opposite control end of the spool, the bushing formed with a first plurality of radially-oriented passages opening into an annular groove formed in the bore, the groove having sloped side edges. The spool supports plural ring-seals arranged to engage the sloped side edges of the annular groove and thereby seal off the radially-oriented passages when the spool is in a neutral position. Movement of the spool is adjustably limited in one direction and dampened in both axial directions. | 11-28-2013 |
| 20130312850 | ACTUATOR FOR OPERATING A VALVE IN A FLUID LINE - The present invention relates to an actuator ( | 11-28-2013 |
| 20150068620 | PRESSURE REGULATING VALVE ASSEMBLY - A pressure regulating valve assembly includes a housing. Also included is a valve sleeve mounted within a bore of the housing, the valve sleeve having a first portion and a second portion, the second portion having a diameter less than the first portion and received in a sense piston bore of the housing. Further included is a valve spool mounted within the valve sleeve. Yet further included is a sense piston disposed within the second portion of the valve sleeve. Also included is a damping orifice extending through an end portion of the second portion of the valve sleeve. | 03-12-2015 |
| 20150107699 | VALVE FOR VALVE ASSEMBLY - The invention relates to a valve ( | 04-23-2015 |
| 20150300523 | VALVE ASSEMBLY - The present invention includes a sensing device, a bonnet located below the sensing device, a piston with a through hole, and a valve stem connected with the sensing device, and a penetrating part through the through hole wherein the sensing device drives the valve stem to drive the piston; an auxiliary spring is arranged between the bonnet and the piston; the penetrating part is longer than the depth of the through hole; and the valve stem is slidably coupled in piston. The disclosed valve can prevent the valve stem from transferring the force of the main spring to the piston, so as to avoid damaging the valve port, the valve stem and the piston due to a reason that the force of the main spring is too large. | 10-22-2015 |
| 20160076557 | COUNTERBALANCE VALVE WITH DUAL OR TRIPLE PILOT RATIO - Novel Counterbalance valves, more particularly, to counterbalance valves that provide hold, capture, and motion control benefits of prior art CB valves while improving upon one or more performance characteristics of current CB valves are herein disclosed. The novel counterbalance valves are useful, inter alia, for providing good system stability across a range of load pressures and/or reducing power consumption (improving energy efficiencies) as compared with prior art devices. | 03-17-2016 |
| 20160139612 | CONTROL SYSTEM FOR GAS PRESSURE CONTROLLERS IN EXPLOSION RISK AREAS - A control system for pressure controllers in explosion risk areas has a pressure controller with adjusting screw to control the pressure inside a conduit used to transport explosive gas. An adapter with a hole is adapted to receive the head of the adjusting screw. An electrical motor adapted to be used in risk explosion areas is provided with a driving shaft connected to the adapter. A support with body has a first end wherein a first hole is obtained to receive a shank of the pressure controller and a second end wherein a second hole is obtained to receive the adapter. A cable box connected to a telecommunication network is provided to remotely control the motor. | 05-19-2016 |
| 20180024577 | PRESSURE-LIMITING VALVE | 01-25-2018 |
