Matches 101 - 150 out of 310 < 1 2 3 4 5 6 7 >
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5351599 Linear drive device  
A linear drive device has a linear motor which consists of a piston, an output rod and a control rod. The two rods extend through the two end plates of the motor housing. The working or output rod...
5347914 Traverse apparatus  
The traverse apparatus of the subject invention is provided at the end of the main base 24 with a control box 38 having electromagnetic valves 57, 58, relief valves 59, 60, and manifold 61; and,...
5343994 End of fill detector for a hydraulic clutch  
An apparatus and method are adapted for detecting an end-of-fill condition of an actuator having a varying control volume is provided. The end-of-fill condition corresponds to the varying control...
5333533 Method and apparatus for controlling an implement  
An implement control system is provided for controllably raising and lowering an implement relative to a work vehicle. The implement is pivotally connected to the work vehicle and movable between...
5325063 Linear position sensor with means to eliminate spurians harmonic detections  
An apparatus is adapted to detect the linear extension, velocity and acceleration of a hydraulic cylinder. The hydraulic cylinder defines a variable length coaxial resonant cavity Under the control...
5313871 Hydraulic control system utilizing a plurality of branch passages with differing flow rates  
A hydraulic control system for controlling an actuator has a cylinder and a piston, and an oil pump. A first passage is communicated with the oil pump, and a second passage is communicated with the...
5312217 Resolved motion velocity control  
A method and apparatus for controlling the movement of an end point of an articulated arm in the x, y and z directions using a manually operated resolved motion control by controlling the component...
5305681 Hydraulic control apparatus  
An apparatus for controllably actuating a hydraulic actuator is provided. The apparatus is connected between a source of pressurized hydraulic fluid and the hydraulic actuator. The apparatus...
5303636 Fluid controller and logic control system for use therewith  
An improved fluid controller (15) is provided having both rotary valving (47) actuated by the steering wheel (17), and axial valving (49) controlled by an electro-hydraulic valve (113) in response...
5303641 Method for checking the driving and control system of hydraulic punch brakes  
A method for checking the driving and control system of a hydraulic punch press is provided which comprises the steps of delivering a stop order signal to the driving device, sensing the position...
H001292 Electro-rheological fluid damped actuator  
An electro-rheological fluid damped actuator having an actuator housing w a moveable element such as a piston and rod assembly disposed within the housing. The actuator further comprises a...
5285715 Electrohydraulic servovalve with flow gain compensation  
An electrohydraulic servovalve including a tailoring circuit coupled to provide a predetermined input signal to the motor of the valve. The predetermined signal functions to control the flow of...
5230272 Hydraulic positioning drive with pressure and position feedback control  
A hydraulic drive is actuated by a CNC means via an electrically actuable valve. The pressure applied to the hydraulic drive or the force excerted by the hydraulic drive is supplied in the form of...
5224410 Power booster with vacuum supply passage in position sensor housing  
A vacuum brake power booster with a connecting member (23) for the connecting nozzle (2) of the vacuum line and for the vacuum non-return valve (3). The connecting member is configured in the shape...
5218895 Electrohydraulic control apparatus and method  
An apparatus, is adapted to controllably position a movable element in a hydraulic motor. A controller receives a request signal and velocity and/or position signals from sensors. The controller,...
5219393 Pressure driven rotary drive  
A hydraulically operated rotary drive includes a housing which is closed in hydraulically tight manner by flat covers and can be connected to a source of pressure fluid, a rotatable shaft extending...
H001191 Electromagnetically actuated spool valve  
An apparatus is provided for controllably positioning a movable element within a hydraulic motor in response to a flow request signal. An electric circuit receives the flow request signal and...
5205168 Device for carrying out quality test firings as well as the use thereof  
In a device for carrying out quality test firings with a gun barrel (1), a mount (2) and an automatic adjusting arrangement (4, 5, 6) for resetting the barrel (1), a given directional setpoint...
5193779 Actuating drive  
This actuating drive (1) has a main piston (4) which can be operated by means of an oil pressure and a pilot control system in effective connection to the main piston (4) by means of a linkage...
5178053 Electronic pilot positioner  
A positioner for use in pneumatic systems moves a pneumatic operator. The positioner is an electronic pilot positioner or electronic to pneumatic interface which provides accurate positioning of...
5146746 Loading/unloading control apparatus for industrial vehicles  
A loading/unloading control apparatus for a industrial vehicle control the discharge capacity of a variable displacement type hydraulic pump in accordance with the detected result of the amount of...
5140895 Valve mechanism for controlling a pressure difference between an upper and a lower chamber of a hydraulic cylinder for a die cushion for a press  
A double acting hydraulic cylinder is a die cushion for a press, with an upper and a lower chamber in communication with each other and with a differential pressure between the two chambers...
5137253 Actuator  
An actuator for a control valve with a control circuit has a main piston which slides in a main cylinder. On one side of the main piston, there is arranged a drive volume, which can be pressurized...
5135031 Power transmission  
A rotary hydraulic machine which includes a housing having a shaft mounted for rotation within the housing about a shaft axis. A cylinder block is coupled to the shaft for co-rotation with the...
5129310 Auto rigging for servo actuator system  
A dual servo actuation system is automatically equalized or rigged by electronic control circuits. A static auto rigging bias is applied to one or the other, or both, of a pair of electro hydraulic...
5121042 Electro-hydraulic servo mechanism  
An electro-hydraulic servo mechanism comprising: a hydraulic actuator formed with a pair of hydraulic chambers and having an output member which is displaced by a differential pressure between the...
5119717 Method of controlling solenoid valves for a hydraulic actuator, with a time delay between closing a normally open valve and opening a normally closed valve  
There is disclosed a method of controlling a hydraulic actuator by using a normally closed solenoid valve and two normally open solenoid valves and selectively actuating them to place the piston of...
5117633 Pneumohydraulic actuator  
A pneumatically driven hydrostatic actuator and a pneumatically driven recirculating hydraulic actuator are provided. Each of these actuators consists of a hydraulic pump fluidly coupled to an...
5102102 Apparatus for controlling operating reaction of winch  
An apparatus for controlling operating reaction of winch comprising a reaction device whose output is variable for applying the output as an operating reaction to an operating lever of a winch,...
5097744 Hydraulic control system  
A hydraulic control system is provided for regulating the slew rate of a servovalve driven actuator within design parameters despite widely varying load conditions. The servovale flow is maintained...
RE33846 Electrohydraulic valve system  
A control system for controlling a double-acting cylinder includes four pilot-operated, proportional-type poppet valves for controlling fluid flow between the cylinder, a pump and a reservoir. Four...
5095804 Drive for a steam servo valve  
A drive for a steam servo valve (2), including a control valve arrangement for regulating the actuating pressure of a servo drive (1), whereby the drive can always be actuated reliably and quickly...
5088383 Multiplexed hydraulic control system with multiplexing valve having planar port array  
A multiplexed hydraulic control system which avoids the use of a rotary multiplexer and thereby allows for random selection of the multiplexed outlet ports and variable dwell times for the...
5088382 Linear unit  
A linear unit (10) is provided with a cylinder (50) and a pressure-fluid actuated piston (52). The piston (52) runs in a borehole (51) of the cylinder (50). A slider (55) runs at the cylinder (50)....
5083494 Electro-hydraulic actuator with mechanical memory  
The reproducing system 9, 10, 42, 43 controls rotation of the rotor 30 of the electric motor 28 in order to provoke a variation in the leakage of the leakage relay 33 with a view to varying the...
5081903 Multiplexed hydraulic control system with multi-bit binary selector signal control  
A multiplexed hydraulic control system having a plurality of hydraulic channels for individually controlling the positions of a plurality of actuators in the respective channels in accordance with...
5079989 Electrohydraulic valve system with a pressure feedback signal modulated by a velocity feedback signal when the velocity exceeds a veloity limit  
An electrohydraulic system for bending tube stock includes a bend head having a mandrel and an actuator coupled to a bending die for engaging the tube stock and bending the stock around the...
5079492 Stability compensating circuit  
A stability compensating circuit of a servomechanism wherein the output displacement of an actuator is controlled, comprising: a unit generating a reference input signal corresponding to a target...
5065663 Electropneumatic or electrohydraulic linear drive mechanism  
A linear drive mechanism has a combination of a drive cylinder, a drive rod stroke-limiting element, position sensors, a solenoid, and a terminal strip, together with internal wirings and hose...
5062264 Hydraulic control system  
An articulated arm employs a controller to generate δr, δΘ and δz signals for controlling the movement of the arm in r, Θ and z directions to product movement of an end point from an initial...
5054369 Multiplexed hydraulic control system with plural selector valves  
A multiplexed hydraulic control system having a plurality of channels and a common source of modulated hydraulic fluid. The common source is shared among the plurality of channels by providing a...
5054599 End of fill detector for a hydraulic clutch  
An apparatus is adapted to detect an end-of-fill condition of an actuator having a varying control volume, C. The apparatus includes a solenoid having a coil and an armature. The armature is...
5048394 Multiplexed hydraulic control system with oscillator for multiplexer drive  
A multiplexed hydraulic control system in which high force margins for the multiplexer are achieved by employing hydraulic oscillators as the multiplexer driving means. The multiplexer is typically...
5044608 Operating force controlling device for operating lever  
An operating force controlling device includes a pair of reactive force mechanisms (70, 70') disposed in an opposing relationship to each other in the direction of operation of an operating lever...
5035113 Electropneumatic remote control for shifting the mechanical transmission of a motor vehicle  
A remote control shifting system for a mechanical transmission. The transmission is operated by two pneumatic cylinders, a selecting cylinder operating in the direction of shift path selection and...
5024141 Method for the synchronous operation of juxtaposed cylinder devices  
Either a reciprocating or a stationary part in each of juxtaposed cylinder devices is provided with a scale having alternate projections and depressions which are arranged with regular pitches in a...
5018431 Apparatus for positioning a work implement  
An apparatus for positioning a work implement in predetermined operative attitudes, including a valve body mounting a piston which is operable for movement through a range of selective operative...
5016519 Linear drive  
A modular handling system is assembled from a plurality of linear drive, rotary drive, or tool modules. The linear drive used as a cylinder block with a cylindrical bore therein and cylinder heads...
5012722 Floating coil servo valve  
An electrohydraulic servo valve employing a linear force motor having a floating coil and armature driven by a high frequency excitation signal modulated to change its average DC component. A servo...
5000077 Enclosed adjustable servo-actuator  
An enclosed adjustable servo-actuator is provided. This servo-actuator includes an elongated hollow cylinder; a first closed end member; a second closed end member; a through passageway is provided...
Matches 101 - 150 out of 310 < 1 2 3 4 5 6 7 >