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5953977 |
Simulation modeling of non-linear hydraulic actuator response
In order to accomplish many tasks of a machine efficiently, a motion planning system predetermines the response of the machine to a given set of motion commands. With two or more actuators being...
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5934169 |
Double-acting electropneumatic positioner
A double-acting electropneumatic positioner for controlling an actuator, the actuator having a first and second chamber, comprises a single-acting electropneumatic positioner which provides an...
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5931180 |
Electropneumatic positioner
An electropneumatic positioner includes a data processing control section and an electropneumatic converter. The control section includes first and second position determining sections and a signal...
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5927520 |
Electro-hydraulic operating system for extensible boom crane
An electro-hydraulic operating system for an extensible boom includes one or more hydraulic cylinders for imparting relative motion between the boom sections to retract the boom according to an...
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5899008 |
Method and apparatus for controlling an implement of a work machine
An apparatus for controllably moving a work implement. The implement is connected to a work machine and is moveable in response to the operation of a hydraulic cylinder. The apparatus includes an...
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5878363 |
Control to improve dump while lifting
A control system is typically used for controlling the implements of a machine. The control system includes a operator control section and a electronic control section having a module for sensing a...
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5857333 |
Control system for hydraulic power units
The present invention relates to a control system for hydraulic power units, in particular hydraulic cylinder-piston-assemblies comprising a valve to be controlled by an electronic controller, the...
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5844390 |
Method and apparatus for regulating a fluid operated machine
A fluid operated machine is monitored and regulated by providing a logic with a memory for storing the timings of properly operating functions, and detectors the outputs of which are used to...
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5832806 |
Non-contacting precision electronic control servo for pneumatic isolators
A positioning system uses a position feedback signal to position and damp a platform. The position feedback signal is input to an electronic controller that provides a plurality of control signal...
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5832730 |
Device and method for suppressing vibration of a working machine
A device and method for suppressing vibration of a working machine in which residual vibration produced immediately after an operation is completed can be suppressed well without degrading the...
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5826483 |
Hydraulic heavy equipment
In hydraulic heavy equipment, a working device has a boom, an arm and a bucket. An operating device has the same link structure as in the working device. By operating the working device, control...
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5823088 |
Pneumatic actuating arrangement
A pneumatic actuating arrangement with a plurality of consumers (1) having working areas (7,8), a plurality of feed air/signal distributors (13) connected to a common pressure source and a common...
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5813226 |
Control scheme for pressure relief
A control scheme is provided that controls the maximum pressure level in desired locations of a hydraulic system. This control scheme eliminates the need of separate line relief valves that many...
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5787787 |
Engine/pump control device for loaders
An engine/pump control device for loaders is disclosed. The control device controllably distributes the output power (rotating force) of an engine to the travelling and working units of a loader in...
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5784945 |
Method and apparatus for determining a valve transform
The invention is an apparatus for determining a valve transform curve in a fluid system. The fluid system has a valve and a fluid actuator arranged to initiate movement of a load. The invention...
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5784944 |
Device and method for controlling attachment of construction machine
A control method and a device to control construction equipment attachments include during manual operation, the pilot pressure discharged from a pilot pump is fed from a manual operation valve...
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5780743 |
Resonance identification in hydraulic cylinder piston position sensing
The ability to be able to identify, distinguish and verify a lock onto harmonic frequency signals in the oil of a hydraulic cylinder using a ratio between consecutively detected harmonics. The...
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5768972 |
Air logic system for side loader
A control and safety system for coordinating movement of multiple hydraulic cylinders to reciprocally rotate a truck-mounted refuse compacting arm. The system includes a logic board controller in...
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5765337 |
Apparatus and method for stacking and boxing stackable articles
A packaging system includes a stacking apparatus which utilizes a supplemental stacking member on a transfer mechanism for receiving at least one article from a conveying mechanism while the...
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5737994 |
Digital variable actuation system
This invention pertains to a hydrostatic actuation system based on a digitally commutated, piston pump. Typically the pump is a fixed displacement axial piston pump with the hydromechanical...
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5737992 |
Method and device for controlling a double-acting cylinder actuated by a pressurized fluid
Method for controlling a pressurized fluid-actuated double acting cylinder in an assembly such as a hydraulic tightening spanner (1) with a control unit therefor, wherein a piston (5) may be...
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5727387 |
Apparatus for controlling an implement of a work machine
An apparatus for controllably moving an implement is provided. The implement is connected to a work machine and is movable between first and second implement positions in response to operation of a...
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5706713 |
Decelerating air pressure circuit for an air cylinder
A decelerating air circuit having an air cylinder is disclosed. The decelerating air circuit includes a driving solenoid valve having an advance mode and a withdrawal mode. A decelerating solenoid...
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5704268 |
Electro-hydraulic shower oscillator for papermaking
The apparatus is an oscillator for a showerhead to keep the forming fabric of a papermaking machine clean and open. A hydraulic cylinder is formed with a piston cup assembly dividing the cylinder...
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5701793 |
Method and apparatus for controlling an implement of a work machine
An apparatus for controllably moving a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus...
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5691894 |
Cylinder positioning control apparatus
A cylinder positioning control apparatus designed to effect positioning of a cylinder by learning control that uses not only an overrun distance but also a cylinder speed as input data for control....
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5666806 |
Control system for a hydraulic cylinder and method
Apparatus and method for controlling at least one hydraulic cylinder by the hydraulic fluid discharged by a hydraulic pump through a control valve. The hydraulic control system includes sensors to...
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5662021 |
Control system for a movement actuator
An improved control system for a movement actuator is disclosed for moving a member between a retracted position and an extended position. The movement actuator comprises a cylinder having a piston...
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5644915 |
Control system for a hydraulic press brake
A control system for controlling the movement of the ram of a press or press brake of the type having one or two main cylinders with pistons operatively attach to the ram. The control system...
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5617723 |
Method for controlling an implement of a work machine
A method for controlling an apparatus (100) for controllably moving an implement (102) is provided. The implement (102) is connected to a work machine (104) and is movable between first and second...
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5617034 |
Signal improvement in the sensing of hydraulic cylinder piston position using electromagnetic waves
Improvement of the ability to detect selected resonant frequencies associated with the position of the piston in a piston position sensing system using electromagnetic waves in the fluid in a...
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5613419 |
Load balancing arm
A load balancing arm is shown and described as having improved control including a programmable control element and electronic air regulation to provide precise and controllable lifting force on a...
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5584224 |
Hydraulic systems
An hydraulic lift system has an actuator connected to an hydraulic circuit, having a pump, via a supply line. A balanced seated valve is connected between the supply line and a reservoir, the valve...
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5560275 |
Drive of the fluid or electric type with a control
The present invention relates to a drive of the fluid or electric type having a device for controlling an element for transmitting a driving force to a reciprocating or otherwise moveable or...
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5533336 |
Hydroelectric cylinder for improved power amplification and control
The present invention describes an apparatus for achieving power amplification in general press and elevating systems with enhanced control and without the disadvantages of the pneumatic and...
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5519326 |
Linear position sensor using a coaxial resonant cavity
An apparatus (102) is adapted to detect the linear extension (position), velocity and acceleration of a hydraulic cylinder (108). The hydraulic cylinder (108) defines a variable length coaxial...
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5511458 |
Automatic cushioning control apparatus for cylinder of working machine
An automatic cushioning control apparatus for a cylinder of a working machine provides a quiet cylinder cushioning effect, causing little shaking of a vehicle body, without using a mechanical...
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5505043 |
Hydraulic lift device for battery operated industrial trucks or the like
A hydraulic lift device for battery operated industrial trucks comprising a hydraulic ram, a hydraulic machine operating as a pump in a load raising cycle and as a motor in a load lowering cycle, a...
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5490383 |
Method of pressure controlling a hydrostatic machine having an adjustable delivery volume
The present invention provides a method for pressure control of an adjustable pump for a hydraulic system including at least a load. Depending on the size of the system, i.e. the servo cylinder,...
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5481959 |
Automatic air balancer system
An automatic air balancer system capable of maintaining various kinds of load at a predetermined position and then moving the load at a desired speed, or applying a desired mechanical force to...
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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...
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5458047 |
High speed pneumatic servo actuator with hydraulic damper
A hydraulic damper for a high speed actuator is provided to bring the actuator to rest with minimum oscillation around a target position. The hydraulic damper comprises a hydraulic circuit to...
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5438909 |
Device for energy transmission for mechanical control, in particular for the control of braking pressure in a brake
The device according to the invention includes at least one rotational actuator fitted with a return spring and a connecting rod connected to the rotational actuator to transmit a linear movement...
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5431086 |
Method of controlling cylinder apparatus
A method of controlling a cylinder apparatus includes the steps of supplying compressed air of a first high pressure to one chamber of a cylinder which is divided into two chambers by a piston, and...
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5424941 |
Apparatus and method for positioning a pneumatic actuator
A closed loop control system for a pneumatic actuator using position and pressure feedback signals. The feedback signals are supplied to a microprocessor which successively generates a desired...
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5409188 |
Stability compensating mechanism of electro-hydraulic servo system
In a stability compensating mechanism of an electro-hydraulic servo system which includes a load-displacement detecting unit for detecting a displacement of a piston of actuator or a displacement...
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5383390 |
Multi-variable control of multi-degree of freedom linkages
The present invention provides an apparatus for controllably actuating a work implement. The work implement includes at least a first linkage and a second linkage. The apparatus produces a control...
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5365829 |
Transfer driver for pressing machine
An apparatus for operating feed bars to move a workpiece between stages of a pressing machine includes cylinder devices. Each of the cylinder devices serves to move the feed bars linearly and each...
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5357878 |
Burner tilt feedback control
A control system is provided for an actuating member including a controller, a solenoid valve electrically coupled to the controller, a fluid driven actuator operatively coupled to the solenoid...
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5353594 |
Driving mechanism of a circuit breaker
In a driving mechanism of a circuit breaker having first and second hydraulic operation apparatuses respectively driving a main contact and a resistor contact, a sequential control valve is...
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