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| Number | Title | Issue Date |
| 8028717 | High throughput double valve with reduced outlet pressure during a faulted state A double valve having inlet, outlet, and exhaust ports maintains an outlet pressure below one percent of inlet pressure during a faulted state while maintaining a relatively small exhaust for reduced overall valve size. Crossover passages receive inlet pressure thro... | 10/04/2011 |
| 7328719 | Valve state sensing module A sensing module for a fluid valve utilizes a sensor body having a sensing chamber. An extension member is fixedly coupled to a main valve element, is slidable within the sensing chamber along a first axis, and has an inclined cam surface. A plunger has a cam follow... | 02/12/2008 |
| 7281464 | Inlet monitor and latch for a crust breaking system A system for selectively controlling movement of a piston between first and second positions, the system comprising a controller selectively actuated to enable fluid communication between a device and a source of pressurized fluid, a control valve for enabling fluid... | 10/16/2007 |
| 7213612 | High pressure ball-poppet control valve with flow control A control valve for operating a fluid-actuated device includes a fluid inlet, a fluid outlet and a passage in fluid communication between the fluid inlet and the fluid outlet, the passage defining a longitudinal axis. A valve seat is disposed in the passage and incl... | 05/08/2007 |
| 7114521 | Double valve constructed from unitary single valves A double valve is constructed from first and second unitary valve assemblies each having a respective inlet port, a respective outlet port, a respective exhaust port, a respective first cross-mirror port, and a respective second cross-mirror port. A first plate is c... | 10/03/2006 |
| 7089957 | Redundant valve system The redundant valve system 10 of the preferred embodiment includes a first valve unit 12 and a second valve unit 14. The redundant valve system 10 is preferably used to connect a source 16 to a destination 18 and to connect ... | 08/15/2006 |
| 7077148 | Redundant valve system The redundant valve system 10 of the preferred embodiments includes a first valve unit 12, a second valve unit 14, a third valve unit 16, a first diagnostic device 18, a second diagnostic device 20, and a control unit 22 | 07/18/2006 |
| 6886593 | Safety valve with pressure indicator A fluid control valve includes an adjustable soft start capability and pressure indicator device. The fluid control valve isolates an input port and connects an outlet port to an exhaust port when the fluid control valve is in its closed position. A system is provid... | 05/03/2005 |
| 6840258 | Dynamically-monitored double valve with anti-tiedown feature A double valve is reset when a source of pressurized fluid is connected to a reset port. When the source of pressurized fluid is removed from the reset port, a first reset piston is retracted so that a second pilot chamber receives pressurized fluid while a first pi... | 01/11/2005 |
| 6840259 | Dynamically-monitored double valve with retained memory of valve states A double valve for controlling a machine tool has a memory such that when the valve is in its normal deactuated state and the inlet air supply is cycled (e.g., turned from on to off or from off to on), then the valve remains in the deactuated (i.e., ready to run) st... | 01/11/2005 |
| 6834661 | Dual mode solenoid valve with pressure regulation A control valve system includes a housing having an inlet port, a first output port, a second output port, and a valve chamber. A primary spool and a secondary spool are independently slidable in the valve chamber. The secondary spool has a first end for abutting ag... | 12/28/2004 |
| 6830066 | Valve with positively driven sensing switch connection A monitored fluid control valve is provided having a valve body with an elongated bore. A movable valve element is slidably received in the bore. A switch assembly has an aperture aligned with the bore. The switch assembly includes an electrical switch having a swit... | 12/14/2004 |
| 6824144 | Kneeling valve A kneeling valve assembly for transport vehicles to enable a quick and convenient kneeling operation to permit safe ingress and egress from the vehicle. The kneeling valve assembly employs a suspension member positioned between the vehicle body and the axle of the t... | 11/30/2004 |
| 6755214 | Solenoid valve for reduced energy consumption A control valve system including a housing having an inlet, a first output, and a second output. The control valve system further includes a slidable valve positionable in a first position, where fluid communication is established between the inlet and the first out... | 06/29/2004 |
| 6751520 | Intrinsically safe microprocessor controlled pressure regulator An intrinsically safe microprocessor controlled pressure regulator for operation in a hazardous environment. The intrinsically safe microprocessor controlled pressure regulator receives control commands that are input to a microprocessor in the hazardous environment... | 06/15/2004 |
| 6732761 | Solenoid valve for reduced energy consumption A control valve system including a housing having an inlet, a first output, and a second output. The control valve system further includes a slidable valve positionable in a first position, where fluid communication is established between the inlet and the first out... | 05/11/2004 |
| 6722390 | Hydraulic double valve A control valve system in which main valves are actuated and deactuated by operation of pilot valves. Actuation of pilot valves causes actuation of the main valves, which enables fluid pressure to be output from the control valve system. The main valves must shift w... | 04/20/2004 |
| 6685159 | Wireless, intrinsically safe valve A valve system (10) that employs a piezo-electric element (38) to activate a fluid flow valve (18) so as to use a minimal amount of electrical energy. The piezo-electric element (38) activates a pilot pressure valve (36), which allows a control fluid to p... | 02/03/2004 |
| 6649035 | Low energy and non-heat transferring crust breaking system A pneumatic control system is provided for selectively controlling movement of a pneumatically-operated device between first and second working positions. The pneumatically-operated device includes a working portion and a pneumatic-control portion. The pn... | 11/18/2003 |
| 6637462 | Variable pressure control device A control valve system having a housing defining an inlet, an outlet, and an exhaust. A first passage extends between the inlet and the outlet and a second passage extends between the outlet and the exhaust. The control valve system includes a first valve... | 10/28/2003 |
| 6609767 | Pneumatic control system A pneumatic control system for a freight car having a brake pipe, auxiliary and emergency reservoirs normally charged with pressurized fluid from the brake pipe, a fluid pressure activated brake cylinder device and an exhaust including an electronic contr... | 08/26/2003 |
| 6604547 | Double valve with cross exhaust A control Valve system having a housing defining a first inlet, a second inlet, a first outlet, a second outlet, and an exhaust to define an intrinsically safe double valve. The double control valve system of the present invention further includes a pair ... | 08/12/2003 |
| 6478049 | Double valve with anti-tiedown capability A control valve system having housing defining an inlet, an outlet and an exhaust. A first passage extends between the inlet and the outlet and a second passage extends between the outlet and the exhaust. A first plurality of valves are disposed within th... | 11/12/2002 |
| 6431207 | High-pressure ball-poppet control valve A high-pressure fluid control valve is disclosed for operating a fluid-actuated device. Preferably a ball-poppet and frusto-conical valve seat adapted for substantially line-type contact therebetween are provided with an upstream restricted flow area in o... | 08/13/2002 |
| 6431209 | Multi-pressure ball-poppet control valve A high-pressure primary fluid control valve and a multi-pressure selector fluid control valve are disclosed for operating a fluid-actuated device. Preferably a spherical ball-poppet and frusto-conical valve seat adapted for substantially line-contact ther... | 08/13/2002 |
| 6318396 | Double valve with anti-tiedown capability A control valve system has two valve trains each of which has a series of valves which dynamically move between a deactuated position and an actuated position. An inlet of the valve system is connected to an outlet of the valve system when all of the valv... | 11/20/2001 |
| 6155293 | Double valve with anti-tiedown capability A control valve system has two valve trains each of which has a series of valves which dynamically move between a deactuated position and an actuated position. An inlet of the valve system is connected to an outlet of the valve system when all of the valv... | 12/05/2000 |
| 5927324 | Cross flow with crossmirror and lock out capability valve A control valve system has two valve trains each of which has a series of valves which dynamically move between a deactuated position and an actuated position. An inlet of the valve system is connected to an outlet of the valve system when all of the valv... | 07/27/1999 |
| 5918631 | Ball-poppet pneumatic control valve A pneumatic fluid control valve includes a valve body having a fluid inlet connectable to an external source of pressurized pneumatic working fluid, one or more load outlets, one or more corresponding exhaust ports, and a movable valve mechanism. The mova... | 07/06/1999 |
| 5912795 | Circuit reset lockout A reset lockout for a control device which functions to control and monitor the essentially simultaneous energization of two electromagnets (61, 62) in response to a respective electric signal (S1, S2) applied to said electromagnets essentially simultaneo... | 06/15/1999 |
| 5850852 | Crossflow with crossmirror and lock out capability valve A control valve system has two valve trains each of which has a series of valves which dynamically move between a deactuated position and an actuated position. An inlet of the valve system is connected to an outlet of the valve system when all of the valv... | 12/22/1998 |
| 5816132 | Load-sensing pneumatic control system A pneumatic control system for selectively controlling a pneumatically-operated device for controlling movement of a variable load, such as a material handling device or lifting and lowering device, is capable of automatically sensing the load exerted on ... | 10/06/1998 |
| 5799561 | Control device A control device for controlling and monitoring two fluid valves, wherein each fluid valve comprises a drive means which is adapted for activation by an associated control signal, and a movable valve element which is biassed toward a first position in whi... | 09/01/1998 |
| 5796571 | Control device for a two-hand control means for controlling presses for instance A control device contains two electromagnets (61, 62) in a respective current supply circuit (41, 44; 42, 44) which includes a biassed switch (20, 21) having first and second output terminals (2, 4), wherein the switches are biassed towards the first outp... | 08/18/1998 |
| 5699829 | Fluid control valve with soft startup A fluid control valve includes an adjustable soft start capability. The fluid control valve isolates an input port and connects an outlet port to an exhaust port when the fluid control valve is in its closed position. A system is provided for locking the ... | 12/23/1997 |
| 5163353 | Energy saving and monitoring pneumatic control valve system An improved pneumatic control system is selectively deactuable and actuable for controlling movement of the armature of a pneumatically-operated device between first and second working positions and includes a timing subsystem that enhances the efficiency... | 11/17/1992 |
| 5113907 | Dynamic self-monitoring air operating system A safety monitoring system is provided for a pneumatic control system having a double safety valve arrangement. The monitoring system is adapted for preventing further operation of the control system in response to a malfunction of either the double safet... | 05/19/1992 |
| 5067519 | Safety valve for fluid systems An improved safety valve includes piston-actuated provisions for gradually pressurizing a fluid-actuated motor during start-up of the system, preferably by way of a changeable flow restriction. In addition such improved safety valve preferably includes a ... | 11/26/1991 |
| 4930401 | Valve system and arrangement for on-line valve replacement Several embodiments are disclosed of an automatic shutoff valve apparatus for permitting removal, repair, or replacement of a control valve from a mounting base without deactivating a complete system. In addition, a redundancy arrangement is disclosed whe... | 06/05/1990 |
| 4883091 | Multi-port self-regulating proportional pressure control valve A multi-port, self-regulating, proportional control valve preferably uses a load output feedback system to produce working fluid load output pressures that are proportional to pilot control fluid pressures. In some embodiments, the control valve is progra... | 11/28/1989 |
