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| Number | Title | Issue Date |
| 7891375 | Softstart valve means A softstart valve means comprises a main valve member which is only switched over after a certain time from a closed position into an open position. The opening force required for switch over of the main valve member can be produced selectively in a manner dependent... | 02/22/2011 |
| 7779863 | Pressure control valve having an asymmetric valving structure The present invention describes, generally, a method and system for controlling the dynamics of an actuatable load functioning or operable within a servo or servo-type system, wherein the dynamics of the load are controlled by way of a unique asymmetric pressure con... | 08/24/2010 |
| 7735516 | Lift axle control module A lift axle control module is disclosed that is simpler than prior art lift axle control systems, and does not require cycling the input pressure to the regulator. The module includes a housing fluidly connected to a first pressurized air supply and having one chamb... | 06/15/2010 |
| 7293580 | Valve The valve includes a body having five surfaces and a plurality of blind holes, grooves and channels interconnected with the blind holes to form communication net. Two rectangular diaphragms are embedded separately into the grooves so as to selectively open and close... | 11/13/2007 |
| 7284471 | Pressure control valve having intrinsic mechanical feedback system A method and system for controlling the dynamics of an actuatable load functioning or operable within a servo or servo-type system, wherein the dynamics of the load are controlled by way of a unique pressure control valve configured to provide intrinsic pressure reg... | 10/23/2007 |
| 7177709 | Controller for underground mining A controller is disclosed for control operations in underground mining, especially for controllers to control support shields. The controller utilizes a central unit with a microprocessor and assigned, programmable memory devices for the storage and processing of so... | 02/13/2007 |
| 7117889 | Three-way valve The object of the present invention is to provide a three-way valve reduced in the number of component parts and man-hours for assembling the component parts. A pressure chamber of a piston for urging a first main valve in a valve-closing direction by a spring, and ... | 10/10/2006 |
| 7060041 | Chest compressor Apparatus for compressing the chest of a patient to stimulate blood circulation, includes a torso wrap (32) that has a back portion (40) lying at the back of the patient's chest and a front portion (42) lying at the front of the patient's chest,... | 06/13/2006 |
| 7011081 | Double-pintle emission control valve having a one-piece double-seat element A cylindrical-walled seat element (50) in a double-pintle (42) EEGR valve (20) is a machined metal part in which two substantially identical apertures (62, 64) collectively span essentially a semi-circumference of the seat element wall ( | 03/14/2006 |
| 7003949 | Integrated three function valve An integrated three function valve (ITFV) that combines the functions of a bypass valve (e.g. 183a, 185a, 161a) into a single assembly is disclosed. The ITFV allows continued operation after any two failures. With the integr... | 02/28/2006 |
| 6945738 | Method and apparatus for safety protection of temporary roof support Embodiments of the present invention are directed to a method and apparatus for safety protection control of temporary roof support. In one embodiment, a temporary roof support has a load sensing member. In another embodiment, a beam structure of temporary roof supp... | 09/20/2005 |
| 6712091 | Control device for a hydraulic control motor A control device for a hydraulic control motor includes at least one valve controlled actively by an actuating force and at least one passive valve which is operatively connected to the actively controlled valve and which is co-controlled via a line. ... | 03/30/2004 |
| 6684905 | Construction machine The present invention provides a construction machine with a structure of pilot pipe comprising detection ports for detecting pilot pressure in a body of a switching valve, so that the number of pipe connecting positions and pipe assembly parts such as jo... | 02/03/2004 |
| 6679162 | Working cylinder, switch valve and pressure-actuated working unit A working cylinder (A) having at least one working chamber (6, 7) defined by the cylinder barrel (1), at least one of the end sections (2, 3) and a piston (4), at least one supply port (9a, 9b) and a exhaust port (12a, 12b) for the working medium. The exh... | 01/20/2004 |
| 6554026 | Device for controlling flowing media A valve for controlling flowing media, in particular suction air used in connection with suction heads or the like, in which closing diaphragms (17, 18) made from elastically deformable material are disposed within a valve housing (10) and are subjected t... | 04/29/2003 |
| 6467496 | Single-adjustment, dual-null pressure setting for an electrohydraulic valve pilot stage An electrohydraulic valve pilot stage for controlling differential pressure is disclosed. The electrohydraulic valve pilot stage has a housing for protecting the valve; a first and second inlet capable of connection to fluid supplies; a first nozzle and a... | 10/22/2002 |
| 6443175 | Vacuum pressure generator circuit with non-volitile memory function The present invention is a pressure feedback circuit for use with a vacuum pressure control circuit. The pressure feedback circuit detects the occurrence of, and controls the generation of vacuum pressure under, External Override Conditions ("EOCs"). Duri... | 09/03/2002 |
| 6408876 | Control valve It is an object of the present invention to provide a control valve which can reduce the number of external lines connected to a hydraulic remote control valve. A control valve 1 for controlling hydraulic cylinders 2,2' is provided, in one 26 of spool cov... | 06/25/2002 |
| 6286547 | Module for driving actuators A module comprises a pilot valve and four switching valves, in particular for driving actuators, the pilot valve being a 4/3-way valve.... | 09/11/2001 |
| 6223773 | Check valve assembly In a check valve assembly and a valve assembly employing such a check valve assembly, a topping piston may be taken into contact with a main poppet to raise the main poppet from its seat. The main poppet is designed without significant area difference fro... | 05/01/2001 |
| 6209580 | Multifunction valve assembly An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing as... | 04/03/2001 |
| 6196247 | Valve assembly and method for actuation of such a valve assembly A valve assembly for actuation of a user and a method for actuation of the valve assembly, wherein a supply throttle device and a drain throttle device may be actuated independent of each other, is disclosed. In the case of single-action users, the drain ... | 03/06/2001 |
| 6186172 | Directional control valve apparatus A directional control valve system is provided in conjunction with a hydraulic actuator, using a meter-in flow control valve that is simple in structure to permit pressure fluid to be fed into a first and a second chamber of the hydraulic actuator. The di... | 02/13/2001 |
| 6179000 | Three-way valve A three-way valve for controlling the application of air to a pneumatically controllable device has a pressure chamber for pressurizing a work chamber to which the device is connectable and an exhaust chamber for expelling air from the work chamber. Unidi... | 01/30/2001 |
| 6164327 | Meter-out flow control valve A meter-out flow control valve is provided that is compact and possesses a regenerative function. A poppet valve 70 for establishing and blocking fluid communication between a first actuator port 73-1 and a tank port 74 is urged by a spring 71 into a pres... | 12/26/2000 |
| 6152163 | Switching valve for multi-chamber adsorbent air and gas fractionation system A unique switching valve for use with a multi-chamber adsorbent air and gas fractionation system for controlling the flow of fluid which comprises a valve housing including an inlet port, two outlet ports and an exhaust port and first valve and second val... | 11/28/2000 |
| 6145541 | Four-way selector valve A four-way selector valve comprises a valve case connected with a first pipe, a separate chamber communicating with a second pipe, a first valve seat ring in communicating path between a connecting portion of a third pipe and a space of said valve case, a... | 11/14/2000 |
| 5979498 | Three-way or multi-way valve A three-way or multi-way valve is provided, which is built up of a plurality of two-way valves, each of which has a high pressure connection and a low pressure connection which are separated from each other by means of a valve seat with which a closure el... | 11/09/1999 |
| 5975134 | Valve system A central block is disclosed for a pilot controlled valve system with seat and piston valves. The central block has a preferably standardized connection interface (12), a pilot valve interface (13) for receiving a pilot valve (32), a pump conduit (P), a t... | 11/02/1999 |
| 5588463 | Module for controlling pressure in a hydraulic circuit A module for controlling pressure in a hydraulic circuit, comprising at least one generator of pressurized fluid, at least one reservoir of low pressure fluid, and at least one pressure receiver. The module including a solenoid valve having an electric co... | 12/31/1996 |
| 5551478 | Multiplexing hydraulic control network with latching valves A hydraulic control system for a jet aircraft engine has an electronic control that commands a pair of torque motors to ultimately control the position of each one of a plurality of two-position, "latching" hydraulic actuator valves. A first torque motor ... | 09/03/1996 |
| 5546988 | Servo multiplexing system Fluidic control of a number of remote functions is achieved by a single servo controlled linearly actuated distribution valve (29) in conjunction with a like number of bistable hydraulically actuable holding relays (17,19,21) the individual states of whic... | 08/20/1996 |
| 5522301 | Pressure control valve for a hydraulic actuator A two stage valve assembly responsive to signals from a control system for supplying pressurized fluid to two load lines. The first stage includes a motor that directs pressurized fluid from a jet pipe toward a receiver assembly having two receiver ports ... | 06/04/1996 |
| 5443087 | Method and system for controlling a pressurized fluid and valve assembly for use therein A method and system are provided for controlling a pressurized fluid such as nitrogen gas which may be initially stored at a pressure as high as 20,000 psi. The pressurized nitrogen gas may be utilized in high pressure gas systems such as in gas-assisted ... | 08/22/1995 |
| 5372060 | Hydraulic valve assembly A hydraulic valve assembly comprises a valve body defining first and second valve receptacle bores, a fluid pump, a first fluid passage communicated with the fluid pump, a second fluid passage communicated with a hydraulic load, and a third fluid passage ... | 12/13/1994 |
| 5361679 | Directional control valve with pilot operated poppet valves Shown is a direction control valve (16) for use in a hydraulic control system having a source of hydraulic pressure (P) and a return passageway (50). The control valve includes a first hydraulic flow pathway (140, 142) and a second hydraulic flow pathway ... | 11/08/1994 |
| 5331883 | Hydraulic valve means The disclosure is directed to a valve arrangement for controlling a linear or rotary hydraulic motor. The valve is connected to a pump which acts as a pressure medium source by the valve means and to a tank. The tank connection may be either direct or ind... | 07/26/1994 |
| 5280807 | Supply circuit for a two-tube hydraulic system A supply circuit for a hydraulic fluid system has at least one pressure generation device, at least one connecting valve, a main line and a safety deactivation unit. The supply circuit permits a hydraulic fluid to be fed in such a way that, in all operati... | 01/25/1994 |
| 5272959 | Power transmission A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump for supplying fluid to said actuator, a directio... | 12/28/1993 |
| 5263513 | Dual flow passage poppet valve A dual passage valve with four way controls comprises a synchronized poppet combination reciprocally mounted within the valve housing. There is a bore axially formed in the housing with two fluid passageways located at the proximal and distal ends of the ... | 11/23/1993 |
