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| Number | Title | Issue Date |
| 7703279 | Programmable cylinder, system and method for changing velocity of a machine element within a cylinder A programmable cylinder, a system and a method change a velocity of a machine element within a compartment. A light detector within the compartment determines that the machine element is located at a first position or at a second position and/or is moving at a first... | 04/27/2010 |
| 7506505 | Hydraulic driving device for operating machine In a hydraulic driving device for an operating machine, when an output value of an operating device is in a first predetermined range, a pump is stopped and each of an open and closed valve and a hydraulic control valve is closed. When the output value goes beyond t... | 03/24/2009 |
| 7441404 | Configurable hydraulic control system A control system for a work machine having a plurality of removably attachable work tools is disclosed. The control system has a tool recognition device configured to generate a recognition signal corresponding to each of the removably attachable work tools, and at ... | 10/28/2008 |
| 7373776 | Hydrostatic transmission controls to simulate gear drive A control apparatus is provided for a hydrostatic transmission to simulate a gear drive on a tractor. The hydrostatic transmission has a swashplate that is angularly movable to a plurality of positions, and a proportional valve that provides a control pressure to a ... | 05/20/2008 |
| 7354028 | Method for controlling application of brakes in single drum hoist systems A method of damping the oscillations during an emergency stop of an ascending single drum hoist system in a shaft having a conveyance, the mechanical brakes applying a braking force to the drum and the drum rotating in a first direction having a speed, comprising ap... | 04/08/2008 |
| 7353743 | Multi-valve fluid operated cylinder positioning system A position control system is used for controlling a fluid operated cylinder having at least one fluid chamber defined by a piston located within a housing for movement between first and second end limits of travel. The system includes at least two electrically actua... | 04/08/2008 |
| 7353649 | Hydraulic pressure supply control in industrial vehicle A priority flow rate control valve (30) distributes pressurized working oil discharged from a hydraulic pump (10) driven by an electric motor (11) to a power steering device (20) first, and distributes the residual pressurized working oil... | 04/08/2008 |
| 7269943 | Apparatus and method for controlling work tool vibration An apparatus and method for controlling a work tool on a work machine are provided. The work machine may have first and second actuators, each actuator being operable in a vibratory mode and a non-vibratory mode, and each actuator being coupled to the work tool for ... | 09/18/2007 |
| 7254452 | Distributed input/output control systems and methods Apparatus and methods for controlling a system that operates responsive to a plurality of input control signals are disclosed. During operation the system generates a plurality of output status/control signals. A master controller has at least first and second contr... | 08/07/2007 |
| 7249458 | Self-contained hydraulic actuator system The hydraulic linear actuator system of the present invention includes a pump that is configured to rotate in a single direction at a substantially constant velocity. Both the direction and flow rate of fluid through the system is controlled by adjusting the positio... | 07/31/2007 |
| 7245975 | Skew compensation A system and method for generating master and slave reference signals is disclosed, wherein at least one axis of the plurality of axes is a master section and at least one axis of the plurality of axes is a slave section, said slave section being a slave of said mas... | 07/17/2007 |
| 7210394 | Method and apparatus for controlling air cylinder A method for controlling an air cylinder such that air is supplied to and exhausted from pressure chambers of the air cylinder by air servo valves. Pressures in the pressure chambers are detected by pressure sensors, signals of the detected pressures are feedback to... | 05/01/2007 |
| 7210291 | Priority communication protocol for a distributed electrohydraulic system having multiple controllers A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controller... | 05/01/2007 |
| 7201366 | Electronic winch monitoring system An electronic winch monitoring system for a winch having a fixed-ratio gearbox with input and output shafts, a winch drum connected to the output shaft, and an auxiliary brake connected to the output shaft activated by reducing the pressure in a brake release hydrau... | 04/10/2007 |
| 7194855 | Communication protocol for a distributed electrohydraulic system having multiple controllers A distributed hydraulic system having a plurality of hydraulic functions each including a hydraulic actuator, a valve assembly that controls flow of fluid to the hydraulic actuator, and a function controller which operates the valve assembly. The function controller... | 03/27/2007 |
| 7159394 | Power steering system A steering speed-computing section (81) to differentiate a steering angle of a steering wheel from a steering angle sensor (18) to compute the steering speed signal, a low-pass filter (82) to cut high frequency components in the steering speed s... | 01/09/2007 |
| 7142967 | Features of main control computer for a power machine The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhan... | 11/28/2006 |
| 7130721 | Electrohydraulic control system Consistent with an aspect of the disclosure, a method for controlling a hydraulic cylinder is provided. The hydraulic cylinder is provided with a chamber and configured to receive fluid from a valve. The method includes receiving a user input and determining a desir... | 10/31/2006 |
| 7127885 | Assembly for use in underground mining An electro-hydraulic assembly for use in underground mining is disclosed. The assembly includes a hydraulic component, such as a valve block for an underground self-advancing roof support, as well as actuators and/or sensors which have a housing and can be connected... | 10/31/2006 |
| 7127331 | Turret operator interface system and method for a fire fighting vehicle A turret control system includes one or more control modules, such as an envelope control module, turret targeting module, a turret pan module, a turret deploy module, a turret store module. The preferred turret control system also provides improved turret control f... | 10/24/2006 |
| 7093383 | Automatic hydraulic load leveling system for a work vehicle A machine has a boom, that is pivotally raised and lowered by a first cylinder, and has a load carrier that is pivoted at the end of the boom by a second cylinder. As a machine operator commands movement of the boom, the position of the load carrier is automatically... | 08/22/2006 |
| 7073328 | Method for controlling a pressure supply device in a hydraulic circuit The invention relates to a method for controlling a pressure supply device in a hydraulic circuit, especially in a hydraulic circuit in an automatic gearbox which comprises an hydraulic pump, a pressure control valve and a consumer. The hydraulic pump is controlled ... | 07/11/2006 |
| 7076314 | Precision positioning device and processing machine using the same A precision positioning device comprises a hydraulic cylinder extending along the vertical direction and a piston member accommodated in the cylinder. The inside of the cylinder is divided into two chambers by a piston head of the piston member. A hydraulic circuit ... | 07/11/2006 |
| 7063306 | Electronic winch monitoring system An electronic winch monitoring system for a winch having a fixed-ratio gearbox with input and output shafts, a winch drum connected to the output shaft, and an auxiliary brake connected to the output shaft activated by reducing the pressure in a brake release hydrau... | 06/20/2006 |
| 6951102 | Velocity based method for controlling a hydraulic system A hydraulic circuit branch includes a hydraulic actuator, such as a cylinder, and an assembly of one or more electrohydraulic proportional valves connected in series between a pressurized fluid supply line and a tank return line. The force acting on the hydraulic ac... | 10/04/2005 |
| 6945335 | Oil-pressure controlling device for earthmoving machine An optimal pump flow for both dual tilt operations and single tilt operations is obtained at low cost without increasing the complexity of the device constitution. Where there is a wish to implement a dual tilt operation, a switch is selectively operated and, in acc... | 09/20/2005 |
| 6923285 | Attachment control device The present invention provides an attachment for use with a power machine. An attachment control device includes a controller, such as a microprocessor, a microcontroller or other digital computer which senses the type of attachment and controls power to the attachm... | 08/02/2005 |
| 6909944 | Vehicle control system and method An interface module for a power distribution and control system for a vehicle is described. The interface module includes at least one first link configured to receive an input from input devices on the vehicle, at least one second link configured to control output ... | 06/21/2005 |
| 6880331 | Method and apparatus for control of hydraulic systems An apparatus and method for controlling hydraulic systems. The control apparatus (module) accepts a variety of input forms, and the output is user-configurable to control both sides of an attached coil. The master module is programmable via a graphical user interfac... | 04/19/2005 |
| 6718759 | Velocity based method for controlling a hydraulic system A hydraulic circuit branch includes a hydraulic actuator, such as a cylinder, and an assembly of one or more electrohydraulic proportional valves connected in series between a pressurized fluid supply line and a tank return line. The force acting on the hydraulic ac... | 04/13/2004 |
| 6519938 | Recording and controlling pneumatic profiles The pneumatic power system of this invention is a process that measures at very high resolution the pressure and/or rate of flow profile at various points throughout the pneumatic circuitry of a piece of pneumatic equipment in a manufacturing environment.... | 02/18/2003 |
| 6497096 | Automatic transmission for automobiles An automatic transmission for automobiles is disclosed. In the automatic transmission, a housing (1) is filled with transmission fluid. A pump (2), having an input shaft (6), is positioned at one side within the housing (1), while a turbine (3), having an... | 12/24/2002 |
| 6494039 | Force-controlled hydro-elastic actuator Provided is a force-controlled hydro-elastic actuator, including a hydraulic actuator, having a connection to hydraulic fluid and including a mechanical displacement member positioned to be mechanically displaced by fluid flow at the actuator. A valve is ... | 12/17/2002 |
| 6467264 | Hydraulic circuit with a return line metering valve and method of operation A hydraulic system controls the flow of fluid to and from several functions on a machine. Each function has a valve assembly through which fluid is supplied under pressure from a source to an actuator and through which fluid returns from the actuator to a... | 10/22/2002 |
| 6269635 | Control and hydraulic system for a liftcrane A control system for a liftcrane that utilizes a closed loop hydraulic system that utilizes feed back and feed forward control architecture to provide responsiveness normally associated with systems that do not require feedback.... | 08/07/2001 |
| 6047229 | Tilt control apparatus for industrial vehicles An industrial vehicle including a frame, an axle pivotally mounted on the frame, a restriction mechanism for restricting the pivotal movement of the axle, a pair of vehicle wheels rotatably supported on the axle, and a steering mechanism having a steering... | 04/04/2000 |
| 5934176 | Hydraulic operating system A hydraulic operating system has a cylinder which is actuated to raise, hold or lower a load against the force of gravity. An electromagnetic 3/2 valve connects a working chamber of the cylinder to a hydraulic reservoir when not energized, and permits flo... | 08/10/1999 |
| 5692376 | Control circuit for a construction machine Each attachment for a hydraulically actuated device includes a digitally coded connector which informs a control device about its identity. The control device includes a library which relates the digitally coded identity with fluid parameters of pressure ... | 12/02/1997 |
| 5490385 | Valve range A valve range is suggested suitable for use in connection with the control of fluid operated equipment. It possesses a fluid manifold, which is able to be fitted with pneumatic valves, which are operated via a signal manifold electrically. The valve range... | 02/13/1996 |
| 5457959 | Pressure-operated positioning tool or gripping and clamping tool and process for operating same Disclosed is a process for operating a pressure-operated positioning tool or gripping and clamping tool and a tool itself, in which the position of at least one adjusting member is determined and the valve-actuated supply of pressure medium to the adjusti... | 10/17/1995 |
