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| Number | Title | Issue Date |
| 8146481 | Actuator, actuator control method, and actuator control program An actuator in which overshooting has been reduced is provided. A cylinder is divided by a piston to provide first and second chambers, and first and second control valves 41, 43, which adjust fluid pressure supply to respective chambers in a non-step manner,... | 04/03/2012 |
| 8109197 | Hydraulic control system and method A control system for controlling the movement of a system such as a hydraulic servo controlled gimbal systems. The system includes a plurality of actuators and sensors that sense the position of the actuators. On start up, a control system determines the present ori... | 02/07/2012 |
| 8069772 | Systems and methods for controlling hydraulic actuators Methods and systems for controlling a hydraulic motor are described. By way of illustration, a motor control system has a first input configured to receive a step/direction command signal. A second input is configured to receive a position signal from a motor positi... | 12/06/2011 |
| 8037807 | Controlled motion in a hydraulically actuated system A machine configured to prevent unintentional motion in a linkage pivotally connected to a frame may include a first hydraulic actuator connected to the linkage and a second hydraulic actuator connected to the linkage. The machine may include a sensor and an electro... | 10/18/2011 |
| 7451685 | Hydraulic control system with cross function regeneration A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from one cylinder chamber is routed into the other cylinder chamber, and cro... | 11/18/2008 |
| 7421938 | Positioner for a fluid actuator A positioner for a fluid actuator comprising an electronics assembly designed for setpoint/actual value comparison and for outputting a feedback control signal includes a current/pressure transducer receiving the feedback control signal for controlling the actuator,... | 09/09/2008 |
| 7406910 | Device and method for controlling the position of a pneumatic actuator The invention pertains to a device for the controlling the position of a pneumatic actuator comprising: a pneumatically adjustable actuating element (5); a pneumatic actuating drive (6) for adjusting ... | 08/05/2008 |
| 7387061 | Control apparatus for hydraulic cylinder Cushion chambers (8) disposed in the vicinity of both ends of a hydraulic cylinder (1) to throttle inflow or outflow of an operating oil caused by a piston (5) moving close to a piston stroke end, pressure sensors (16, 17) to detect press... | 06/17/2008 |
| 7380398 | Hydraulic metering mode transitioning technique for a velocity based control system The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time for energy conservation. The metering mode to use is selected in response to the hydraulic load acting on the hydraulic a... | 06/03/2008 |
| 7356397 | Crowd control system for a loader A work vehicle comprising a motor, a drive unit for driving a ground engaging portion, a torque converter for variably transferring power from the motor to the ground engaging portion, a lubrication circuit for providing lubrication fluid to the torque converter, an... | 04/08/2008 |
| 7351288 | Shock absorbing fluidic actuator According to one aspect of the invention, a fluidic actuator and a control system for the fluidic actuator may be provided. A first component of the actuator may have two openings interconnected by a passageway. A second component may be moveably housed within the p... | 04/01/2008 |
| 7349772 | Vehicle integrated radio remote control Radio remote control over a motor vehicle and particularly of auxiliary systems installed on the vehicle is effected through an onboard controller which is integrated with the vehicle's controller area network. This arrangement increases flexibility of the system fo... | 03/25/2008 |
| 7320216 | Hydraulic system having pressure compensated bypass The present disclosure is directed to a hydraulic system. The system includes a first source of pressurized fluid and at least one fluid actuator. The system also includes a first valve disposed between the first source and the at least one fluid actuator being conf... | 01/22/2008 |
| 7320198 | Integrated gas spring actuator strut assembly with threaded nut in gas spring An integrated gas strut actuator assembly particularly adapted for providing power actuation of a motor vehicle lift gate or other opening closure. The assembly integrates the function of a counterbalancing gas spring and that of a electrically powered actuator. The... | 01/22/2008 |
| 7318292 | Method and device for attenuating the motion of hydraulic cylinders of mobile work machinery The present invention relates to a method for attenuating the motion of hydraulic cylinders of mobile work machinery, in particular of hydraulic excavators, in which prior to the hydraulic cylinder reaching one of the limits of travel, its motion speed is reduced, a... | 01/15/2008 |
| 7316382 | Controlling electromotive actuators The invention relates to an electromotive actuator and a corresponding circuit in order to replace a pneumatical actuator system in a simple manner by an electric system. ... | 01/08/2008 |
| 7296404 | Apparatus for controlling deceleration of hydraulically powered equipment A machine member driven by a hydraulic actuator may oscillate, or wag, when the hydraulic actuator decelerates or stops. The degree of oscillation is a function of the machine member's ability to track a deceleration command, which ability varies with changes in the... | 11/20/2007 |
| 7289896 | Working unit control apparatus of excavating and loading machine The invention provides a working unit control apparatus of an excavating and loading machine which can always judge a start of an excavation control at a proper timing. The working unit control apparatus has excavating state detecting means (43, 44) detecting... | 10/30/2007 |
| 7278262 | Control system for suppression of boom or arm oscillation A control for a working apparatus having a boom arm. The apparatus includes a controller operable to receive signals from at least one pressure sensor. The at least one pressure sensor detects pressure of hydraulic fluid in at least one chamber of a control valve. T... | 10/09/2007 |
| 7276669 | Payload overload control system A work machine may have a payload overload control system. The system may include a payload carrier and a lift mechanism configured to raise and lower the payload carrier. The system may further include a payload monitor configured to determine a payload in the payl... | 10/02/2007 |
| 7239235 | Non-contact sensor idle validation switch A switch is disclosed having first and second switch elements each configured to provide power to a sensor when in one state and configured to switch to a second state and provide positional information, for example. The sensor configured to effect the first and sec... | 07/03/2007 |
| 7234659 | Pulverizer An automatically swiveling crushing apparatus has a swiveling motor in a bracket, and branches diverged from charging and discharging paths that constitute the hydraulic piping leading to a cylinder for closing or opening distal crushing arms. One of the branches ex... | 06/26/2007 |
| 7228783 | Pressure control system for a torque-transmitting mechanism The present invention provides a pressure control system having a control solenoid with plurality of coils disposed therein, and operable to provide a plurality of pressure gain characteristics to a torque-transmitting mechanism. By selectively energizing the indivi... | 06/12/2007 |
| 7222444 | Coordinated linkage system for a work vehicle A work vehicle with a tool pivotally attached to a linkage, an actuator for controllably moving the tool about its pivot, and a tilt angle sensor for sensing the absolute angle of the work tool relative to the earth. A controller is adapted to perform an auto-hold f... | 05/29/2007 |
| 7219781 | Electromagnetic suspension system An electromagnetic suspension system comprises a universal joint mechanism for permitting radial movement of a cylinder relative to a center yoke while preventing axial movement of the cylinder relative to the center yoke. Since the cylinder is capable of radial mov... | 05/22/2007 |
| 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 |
| 7209820 | Working unit control apparatus of excavating and loading machine The invention provides a working unit control apparatus of an excavating and loading machine which can always judge a start of an excavation control at a proper timing. The working unit control apparatus has excavating state detecting means (43, 44) detecting... | 04/24/2007 |
| 7207177 | Position control device for an electrical-fluid power drive and a method of positioning A method and a position control device for an electrical-fluid power drive comprising a fluid power and an electrical actuator for driving a force output point. The invention contemplates the following steps: of derivation of a target overall drive force, to be prov... | 04/24/2007 |
| 7200994 | Free piston stirling engine control A control system for a Stirling engine including the use of a synchronous power converter (“SPC”) which is connected to the terminals of the alternator in a linear alternator/FPSE power system. According to the teachings of the present invention, the attached SP... | 04/10/2007 |
| 7190138 | Failure monitor for motor drive control system A failure monitor designed to monitor a failure in operation of a motor drive control system. The system works to drive a motor-driven member through an output shaft and an electric motor and includes an output shaft angular position sensor for determining an angula... | 03/13/2007 |
| 7185939 | Hydraulic drive system for vehicle roofs The invention relates to a hydraulic drive system used for the covers of vehicle openings, in particular for vehicle roofs with a construction that can be opened. In said system, the actuator that is designed to displace the cover is supplied with a bulk current, wh... | 03/06/2007 |
| 7178606 | Work implement side shift control and method A system for automatically moving a work implement of a work machine includes a position monitoring system configured to track a position of the work implement relative to a mapped landscape and programmable to incorporate an electronic representation of at least on... | 02/20/2007 |
| 7178448 | Air servo cylinder apparatus and controlling method therefor A method for controlling an air servo cylinder apparatus includes an advancing process of advancing a piston up to a target position by controlling, by a controller, servo valves individually connected to a pressure chamber on the head side and that on the rod side ... | 02/20/2007 |
| 7170241 | Path module for a linear motor, modular linear motor system and method to control same A path module for a linear motor system includes a controller coupled to one or more amplifiers that are operative to control associated windings in the module. The controller receives control information via a communications link. The controller controls the amplif... | 01/30/2007 |
| 7159506 | State detecting device for load element receiving load of working fluid and state detecting device for fluid pressure control circuit The load element state detecting portion 72 detects the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 on the basis of the displacement of the spool valve element 42. That is,... | 01/09/2007 |
| 7145106 | Heater module for semiconductor manufacturing equipment Heater module, and semiconductor manufacturing equipment in which the heater module is utilized, for raising the cooling speed of a post-heating heater markedly more than conventional, and that can contribute toward bettering and improving productivity, without acco... | 12/05/2006 |
| 7143682 | Large manipulator having a vibration damping capacity A large-size manipulator comprises a boom made up of several segments and arranged on a vehicle frame. The boom is foldable and has a slewing track ring rotated about a vertical axis of rotation. The boom segments can be swiveled with respect to each other and with ... | 12/05/2006 |
| 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 |
| 7093607 | Methods and apparatus for maintaining pressure gain in a servovalve assembly A servovalve has a sleeve having both a first metering aperture and a second metering aperture in fluid communication with a single port cavity defined by the servovalve. A spool oriented within the sleeve has a first land and a second land and defines a channel ori... | 08/22/2006 |
| 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 |
